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VCS-253 Administration of Veritas Cluster Server 6.0 for UNIX

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VCS-253 exam Dumps Source : Administration of Veritas Cluster Server 6.0 for UNIX

Test Code : VCS-253
Test designation : Administration of Veritas Cluster Server 6.0 for UNIX
Vendor designation : Veritas
: 235 real Questions

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Veritas Administration of Veritas Cluster

Astronomers determine once-in-a-lifetime gamma rays | killexams.com real Questions and Pass4sure dumps

UD Professor Jamie Holder (left) and doctoral scholar Tyler Williamson maintain been gaining learning of gamma rays with the assist of the VERITAS telescopes located on the Fred Lawrence Whipple Observatory in Amado, Arizona. credit score: college of Delaware

Scientists maintain discovered something magnificent.

In a cluster of one of the most massive and luminous stars in their galaxy, about 5,000 gentle years from Earth, astronomers detected particles being accelerated by means of a faultless of a sudden rotating neutron celebrated person because it passed with the aid of the large substantial designation it orbits best as soon as every 50 years.

the invention is extremely infrequent, in response to institution of Delaware astrophysicist Jamie Holder and doctoral student Tyler Williamson, who were allotment of the overseas team that documented the occurrence.

Holder known as this eccentric pair of gravitationally linked stars a "gamma-ray binary system" and likened the once-in-a-lifetime event to the advent of Halley's comet or final 12 months's U.S. photo voltaic eclipse.

huge stars are among the many brightest stars in their galaxy. Neutron stars are extraordinarily dense and lively stars that result when a colossal substantial designation explodes.

This binary device is a colossal personage with a neutron personage orbiting around it. Of the 100 billion stars in their galaxy, below 10 are classic to subsist this nature of equipment.

Even fewer—handiest two programs, together with this one—are widely used to maintain an identified neutron superstar, or pulsar, that emits pulses of radio waves that scientists can measure. here's critical since it tells astronomers very precisely how much energy is obtainable to hurry up particles, anything scientists understand exiguous about.

"You could not examine for a higher herbal laboratory to examine particle acceleration in a always changing atmosphere - at energies some distance beyond anything else they are able to produce on earth," pointed out Holder, a professor in UD's department of Physics and Astronomy.

The assignment was led by means of a crew of scientists, together with Holder and Williamson, the usage of the VERITAS telescope array on the Fred Lawrence Whipple Observatory in Arizona, in collaboration with scientists using the MAGIC telescopes at the Roque de los Muchachos Observatory determined in La Palma, an island of the Canary Islands, Spain. (VERITAS stands for terribly full of life Radiation Imaging Telescope Array device and MAGIC stands for most essential Atmospheric Gamma Imaging Cherenkov telescopes.)

probably the most VERITAS telescopes at sunset. credit score: institution of Delaware

The researchers lately reported their findings within the Astrophysical Journal Letters.

Hoping for fireworks

The natural query, to many minds, is why consequence scientists care about accelerated particles?

"as a result of their galaxy is filled with them. They convene them cosmic rays and that they elevate as a lot energy because the light from faultless of the stars," spoke of Holder.

Astronomers establish out more than a hundred years in the past that accelerated particles exist, yet how or the residence these particles hurry up is noiseless a mystery. Pulsars are among the most ascetic objects in the universe and that they maintain magnetic fields around them which are thousands and thousands of times more suitable than the rest scientists could hope to build on the earth. When a pulsar encounters dirt or gasoline close to a massive superstar, the particles nearby hurry up—to close velocity of light velocities—and collide with what's round them. The outcomes is a beam of high-power light referred to as gamma-radiation or gamma rays.

sophisticated telescopes, infatuation those operated by pass of VERITAS and MAGIC, can commemorate these gamma rays as a result of they emit a blue scintillate of mild when they attain the Earth's ambiance. whereas their eyes cannot discern these flashes of light because they're too quick, best nanoseconds lengthy, these telescopes can.

once-in-a-lifetime doctoral experience

Astronomers first discovered gamma rays coming from the pulsar during this unusual pair of stars in 2008. concerning the size of Newark, Delaware, the pulsar is spinning just infatuation the attachment on a kitchen blender, emitting exiguous pulses of gamma rays and radio waves with every rotation.

by pass of measuring these radio pulse frequencies, astronomers were able to relate how rapid the pulsar become relocating and reckon exactly when it could subsist closest to the substantial star that it was orbiting—Nov. 13, 2017. it's a trip that took 50 years.

UD Professor Jamie Holder is dwarfed by using one of the most VERITAS cameras. credit: tuition of Delaware

The VERITAS and MAGIC teams begun monitoring the evening sky and monitoring the pulsar's orbit in September 2016. at the start, they weren't even positive in the event that they would discern anything else. but in September 2017 the astronomers started to commemorate a rapid boost within the variety of gamma rays hitting the top of the earth's atmosphere.

As they monitored the statistics coming from the VERITAS telescopes, Holder and Williamson realized that the pulsar changed into doing some thing discrete daily.

"i might wake up every morning and examine and spot if they had unusual statistics, then anatomize it as speedy as I could, as a result of there were times where the variety of gamma rays they had been seeing became changing impulsively over a day or two," referred to Williamson, a fourth-year doctoral pupil.

during the closest manner between the superstar and the pulsar in November 2017, Williamson noticed that the VERITAS telescopes had—overnight—recorded ten times the number of gamma rays detected best just a few days before.

"I double checked every exiguous thing before sending the facts to their collaborators," Williamson stated. "Then one in faultless their companions, Ralph hen at UCLA, established he'd gotten the same results; that become wonderful."

much more pleasing—this observational statistics didn't healthy what predictive models had expected.

frequently speaking, Holder observed, latest fashions anticipated that because the pulsar approached the massive celebrated person it became orbiting, the variety of gamma rays produced would slowly hurry up, experience some volatility and then slowly spoil over time.

"however their recorded records showed a substantial spike within the variety of gamma rays as a substitute," Holder stated. "This tells us that they necessity to revise the models of how this particle acceleration is going on."

What's greater, in line with Holder, while astrophysicists anticipated the national Aeronautics and house Administration's (NASA) Fermi gamma-ray zone telescope to record these gamma rays, it didn't. Holder pointed out the understanding for here is unclear, but that is a allotment of what makes the VERITAS results so enjoyable.

UD doctoral student Tyler Williamson standing on one of the most VERITAS telescope entry systems. credit: university of Delaware

Astrophysicists want to subsist trained just which particles are being accelerated, and what procedures are pushing them up to these extreme speeds, to subsist able to understand more concerning the Universe. Holder pointed out that youngsters gamma-ray binary programs likely consequence not hurry up a substantial component of the particles in their galaxy, they allow scientists to peep at the category of acceleration mechanisms which may produce them.

Charting a promising future

Astronomers might not subsist capable of discern this binary gadget at work once more unless 2067 when both stars are as soon as once more shut together. by using then, Williamson joked that he simply could subsist an emeritus professor with time on his fingers.

at the moment, Williamson isn't involved about operating out of things to do. He spent three months on the Arizona-based observatory earlier this 12 months, taking measurements, performing hardware renovation and devising a faraway control to enable the researchers to spin on the telescope's cameras from a pc inner a control room.

"It changed into an outstanding haphazard to expend palms-on time with the telescopes and accumulate to know the instrument," said Williamson.

Going ahead, he'll expend the residue of his doctoral stories combing via and inspecting in improved detail the very nearly a hundred seventy five hours of statistics the VERITAS telescopes accrued in 2016 and 2017.

"Tyler is, clearly, the luckiest graduate student I've ever met because this event that occurs most effectual as soon as every 50 years—one of the most enjoyable issues we've got viewed with their telescopes in a decade—passed off appropriate within the middle of his doctoral work," pointed out Holder.

explore further: Kes seventy five—Milky approach's youngest pulsar exposes secrets of celebrity's demise

greater counsel: A. U. Abeysekara et al. VERITAS Observations of the BL Lac kick TXS 0506+056, The Astrophysical Journal (2018). DOI: 10.3847/2041-8213/aad053


Cosmic fireworks | killexams.com real Questions and Pass4sure dumps

As they monitored the data coming from the VERITAS telescopes, Holder and Williamson realized that the pulsar became doing some thing diverse day to day.

“i might wake up each morning and assess and spot if they had unusual records, then anatomize it as quick as I could, as a result of there were times the residence the number of gamma rays they were seeing become altering rapidly over a day or two,” spoke of Williamson, a fourth-year doctoral student.

throughout the closest approach between the substantial designation and the pulsar in November 2017, Williamson observed that the VERITAS telescopes had — in a lone day — recorded ten times the number of gamma rays detected only just a few days before.

“I double checked every thing before sending the facts to their collaborators,” Williamson spoke of. “Then one in faultless their companions, Ralph chicken at UCLA, established he’d gotten the same outcomes; that became entertaining.”

much more entertaining — this observational information did not meet what predictive fashions had estimated.

frequently speakme, Holder pointed out, present models envisioned that because the pulsar approached the substantial star it changed into orbiting, the variety of gamma rays produced would slowly hurry up, journey some volatility and then slowly spoil over time.

“however their recorded statistics showed a tremendous spike in the number of gamma rays in its place,” Holder noted. “This tells us that they should revise the models of how this particle acceleration is going on.”

What’s more, in line with Holder, while astrophysicists anticipated the country wide Aeronautics and space Administration’s (NASA) Fermi gamma-ray house telescope to list these gamma rays, it didn’t. Holder said the understanding for here's doubtful, but that is a allotment of what makes the VERITAS outcomes so pleasing.

Astrophysicists are looking to learn just which particles are being accelerated, and what tactics are pushing them up to those extreme speeds, with the objective to subsist mindful extra about the Universe. Holder spoke of that despite the fact gamma-ray binary programs probably don’t hurry up a huge portion of the particles in their galaxy, they enable scientists to peep at the class of acceleration mechanisms which may produce them.

Charting a promising future

Astronomers won’t subsist able to discern this binary rig at work once more until 2067 when both stars are once once again close collectively. via then, Williamson joked that he just can subsist an emeritus professor with time on his palms.

in the subsist essential time, Williamson is not worried about working out of things to do. He spent three months on the Arizona-primarily based observatory previous this yr, taking measurements, performing hardware preservation and devising a far off manage to enable the researchers to spin on the telescope’s cameras from a laptop internal a ply room.

“It turned into a fine opportunity to expend palms-on time with the telescopes and accumulate to grasp the instrument,” noted Williamson.

Going ahead, he’ll expend the residue of his doctoral experiences combing through and examining in more advantageous ingredient the practically a hundred seventy five hours of statistics the VERITAS telescopes amassed in 2016 and 2017.

“Tyler is, sincerely, the luckiest graduate scholar I’ve ever met as a result of this adventure that happens simplest as soon as every 50 years — probably the most unique issues we’ve viewed with their telescopes in a decade — passed off reform within the core of his doctoral work,” spoke of Holder.

Funding for this work was provided by means of the countrywide Science groundwork and NASA.


VERITAS publicizes IT matters; Celebrates 15 Years of Innovation and Affirms vision for Utility Computing | killexams.com real Questions and Pass4sure dumps

MOUNTAIN VIEW, Calif.--(enterprise WIRE)--Sept. 15, 2004--   A Pioneer in utility Innovation; company Highlights Key Contributions to consumer Success  

VERITAS application company (Nasdaq:VRTS) these days celebrated its 15 12 months anniversary and mirrored on its loaded history of innovation by means of recognizing key innovators, their accomplishments and how they are pondering in regards to the future and enabling utility computing. Key to the enterprise's confirmed song record of innovation are its contributions to constructing the business's first mighty quantity manager and file device, offering business main lower back-up and facts coverage utility and protecting shoppers from disaster with exorbitant availability application. The commonplace thread woven birthright through the company's tradition is an uncanny ability to residence the complications of valued clientele first before establishing and providing utility options to hold modern-day records centers up and running. With a attractiveness for providing resourceful software and engineering excellence VERITAS is neatly positioned to circulate valued clientele toward the subsequent paradigm in computing, utility computing.

"Computing has been through completely extraordinary exchange in the past 15 years, going from the mainframe to client/server to internet-based mostly methods and turning out to subsist ever greater knotty at every step. IT has discovered it increasingly difficult to control this complexity and deliver value to the enterprise," spoke of Gary Bloom, chairman, president and CEO, VERITAS software. "anticipating the subsequent 15 years, VERITAS goes to continue to dispose of complexity from IT, assisting consumers spin into extra productive by riding up utilization of their hardware, and using down their labor costs."

Humble Beginnings

VERITAS utility business enterprise emerged from Tolerant application, Inc. in 1989 which emerged from Tolerant Transaction methods, Inc., a frailty tolerant computing programs company first established in 1982. In 1988 pioneer and co-founder Dale Shipley fashioned a petite software difficult referred to as Tolerant application to pursue engineering excellence in setting up utility intended to subsist positive the availability of computing systems and the mission critical functions that evade across them. From its modest beginnings and tiny staff of gifted engineers the business straight away developed an aptitude for being attentive to purchasers and responding with innovative application-based solutions to their problems. today, VERITAS application is a leading impartial provider of application that permits utility computing using more than 7,a hundred people and conducting company in additional than forty nations around the world.

"From the genesis in 1989 when they fashioned VERITAS software the cornerstone of their success established upon convincing and securing the pilot of AT&T UNIX gadget Laboratories, Inc. to maintain self-possession us to extract the effectual code from the Tolerant systems high availability working gadget and boost and carry the trade's first potent UNIX device V transaction-primarily based quantity supervisor and file rig thereby contributing the early success of AT&T and sun Microsystems within the promising UNIX industry," talked about Dale Shipley, VERITAS co-founder. "It became this calculated possibility that opened the door to the wide horizontal adoption of VERITAS application by the myriad of UNIX systems companies and paved the course towards the business's leadership in storage management and information insurance plan. The business's initial cost proposition nevertheless holds bona fide nowadays, a corporation's most positive IT belongings don't look to subsist the hardware programs, however Somewhat the information that resides on and runs across them and the insurance policy and availability of that data is paramount."

quality, risk and Persistence: volume supervisor and File gadget Emerge

From the starting, the engineers had been considering imaginitive tips on how to dramatically enrich the provision of computing operating methods first via fixing essential issues after which by taking up more complicated strategies. In 1989 if an IT manager desired to makes alterations to the file system of their UNIX computing ambiance it intended bringing the device faultless the pass down to beget adjustments after which bringing it again up with the hope that the changes would not disrupt availability further. The fledging enterprise's strategy at the start centered on three key priorities: first, eradicate system downtime, 2d simplify overly knotty initiatives and enhance a Graphical user Interface (GUI) to imagine storage administration and administrative tasks and third adopt a maniacal focal point toward enhancing the performance of methods. The enterprise had a sheer hill to climb in convincing dozens of leading computing device companies that VERITAS may build, convey and serve a far better exceptional file device than they may themselves at a reduce can imbue and with more suitable efficiency capabilities. at the time shoppers maintain been caught with the file device that shipped with their device dealer's operating device and that meant loads of time invested in managing and administering disparate computing techniques. VERITAS took a calculated possibility that consumers would respond favorably to systems that could subsist managed, modified and administered devoid of disruption. The possibility paid off handsomely with the emergence of VERITAS extent manager in 1990 and VERITAS File device in 1991, two of the company's flagship items that can also subsist discovered on the heart of well-nigh 70 % of the area's facts facilities these days.

"one of the most issues that distinguishes VERITAS with customers is that they prefer a company manner to innovation versus an engineering method," talked about John Colgrove, VERITAS Fellow and 15 year veteran, VERITAS. "if you listen to client's complications and what they're making an attempt to consequence and also you hearken to their desires you accumulate ideas for a pass you could hobble and create options to unravel them. This continues to subsist their future manner and we're engaged on some very entertaining things for customers so one can really bring large charge once they elect their application."

statistics protection Mastered

VERITAS is the de-facto industry common for records backup and information coverage offering utility to meet the wants of the world's smallest organizations and biggest corporations. always innovating and bringing unusual performance to data protection, VERITAS merged with OpenVision in 1997 and delivered its first unlock of VERITAS NetBackup(TM) software to valued clientele. From the genesis the engineers maintain been set on offering essentially the most innovative records coverage application that delivered the optimum efficiency with the least repercussion to conclusion-users. NetBackup application helps each leading operating system and was the primary to market with serve for Linux in 1999. these days, VERITAS NetBackup utility is the trade's No. 1 backup and recovery software and allows IT companies to in the reduction of administration and hardware expenses by means of taking learning of superior enterprise facets, corresponding to synthetics, disk-based protection, computerized disaster healing and laptop and desktop insurance policy.

The 2d key facts protection milestone got here in 1999 when VERITAS got Seagate application's network and Storage management group and the business's leading Microsoft home windows backup utility for petite to mid-sized agencies, VERITAS Backup Exec(TM). fast, light to maneuver and simple to install in 10 minutes or less, Backup Exec software ensures the insurance policy of statistics throughout windows environments. today, Backup Exec application serves the information insurance contrivance needs of greater than a million customers faultless over the world.

A Pioneer in disaster recovery

VERITAS has long been a pioneer in constructing and delivering inventive clustering and disaster restoration application. From the time that VERITAS obtained Tidal Wave and its first exorbitant availability product First Watch in 1995, a rudimentary two node lone utility failover SCSI-based mostly answer, its lead engineers maintain been already brooding about developing advanced clustering options that might scale to eight, sixteen or 32 nodes and ensure the availability of dissimilar purposes running across Storage zone Networks (SANs) with large zone network failover and disaster healing. In 1998 VERITAS delivered its first unlock of VERITAS Cluster Server bringing superior clustering capabilities to each most essential working system from solar Solaris to Microsoft windows to pink Hat Linux together with integration with VERITAS Cluster File system and VERITAS Cluster extent manager to ensure the provision and manageability of dozens of applications running throughout increasingly refined and scaleable IT environments.

"When it comes to your catastrophe healing plan, you only accumulate one haphazard to accumulate it reform since you cannot examine a hurricane or an earthquake or an influence outage to recrudesce lower back day after today," mentioned Jason Bloomstein, personnel utility engineer and 7 year veteran, VERITAS. "in case your contrivance does not work, faultless of the IT infrastructure that you've invested in and deployed goes to waste, but if you've got the ability to peep at various disaster restoration eventualities on a every day foundation with out bringing your production environment down then abruptly which you can maximize these IT investments and accumulate a fine recrudesce on those investments on your company."

The journey to Utility Computing Commences

As customers beget the trek towards utility computing VERITAS is innovating continually to bring increasingly subtle application to market. The latest choices permit IT managers to shift from reactive issue resolution to proactive availability and failover checking out to address issues with storage, servers and purposes before they repercussion the enterprise. by means of combining VERITAS Cluster Server with VERITAS i3(TM), VERITAS OpForce(TM) and VERITAS UpScale(TM) software (scheduled for unencumber in 2005), IT managers will promptly recognise the colossal can imbue savings and recrudesce on funding of automating their IT infrastructure. In an automated ambiance, if an application's performance deteriorates to an unacceptable degree VERITAS i3 application is designed to alert IT managers before the problem influences end-clients and supply insight into a pass to foremost pellucid up the difficulty. If the hardship stems from inadequate processing vigour, VERITAS OpForce utility can instantly provision additional servers and in 2005 VERITAS UpScale application, an acquired Ejasent technology, can migrate the purposes alongside to the brand unusual cluster of their present situation making inescapable that conclusion-clients remain highly productive. Add to that the VERITAS Cluster File gadget and VERITAS Cluster volume supervisor along with the bullet-proof reliability of VERITAS NetBackup application and IT managers are well on their pass towards aligning IT tightly with the changing needs of the enterprise and realizing the swear of utility computing.

"Utility computing is a lot just infatuation the container full of wood pile blocks at your child's school; at some point the exiguous ones participate the blocks to construct a fortress and an zone station and tomorrow they exhaust the identical blocks to construct some thing their imaginations approach up with," stated Oleg Kiselev, technical director and 14 yr veteran, VERITAS. "Now apply that analogy to a field full of IT pile blocks-- storage, servers, switches and application. With VERITAS application it can provision these supplies when they're needed, the residence they are needed, as they may subsist necessary and after they aren't any longer needed they can region them again in a useful resource pool or establish them lower back within the field. Add to this the potential to automatically specify and hold agreed upon application provider and availability degrees and provide excellent-grain utilization accounting and you maintain got a magnificent set of pile blocks. In a nutshell their manner is to convey the application constructing blocks that enable utility computing."

About VERITAS software

VERITAS application, some of the 10 greatest utility agencies on this planet, is a leading provider of software to permit utility computing. In a utility computing model, IT substances are aligned with company needs, and company purposes are delivered with most beneficial efficiency and availability on top of shared computing infrastructure, minimizing hardware and labor fees. With 2003 revenues of $1.75 billion, VERITAS gives you items for facts coverage, storage & server management, high availability and utility efficiency administration which are used via ninety nine percent of the Fortune 500. more guidance about VERITAS software may also subsist establish at www.veritas.com.

Copyright (C) 2004 VERITAS utility supplier. faultless rights reserved. VERITAS, the VERITAS emblem, Backup Exec, i3, NetBackup, OpForce, and UpScale are trademarks or registered trademarks of VERITAS software enterprise or its associates in the U.S. and different international locations. different names may well subsist trademarks of their respective corporations.


VCS-253 Administration of Veritas Cluster Server 6.0 for UNIX

Study pilot Prepared by Killexams.com Veritas Dumps Experts


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VCS-253 exam Dumps Source : Administration of Veritas Cluster Server 6.0 for UNIX

Test Code : VCS-253
Test designation : Administration of Veritas Cluster Server 6.0 for UNIX
Vendor designation : Veritas
: 235 real Questions

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Administration of Veritas Cluster Server 6.0 for UNIX

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Veritas Cluster Server for UNIX | killexams.com real questions and Pass4sure dumps

No result found, try unusual keyword!For individuals who maintain the learning and skills necessary to plan, install, implement, and maintain Veritas Cluster Server 5.0 on a UNIX platform. You must pass the Administration of high Availabili...

Symantec launches high availability software for virtual, physical servers | killexams.com real questions and Pass4sure dumps

Symantec Corp. today launched version 6.0 of its high availability software and storage management applications, including unusual Virtual business Services (VBS) for recovery of applications across multiple business units, operating systems and storage platforms.

Symantec also added built-in data deduplication and compression at the file-system level, as well as the ability to shrink or expand thin provisioned storage from Veritas Storage Foundation and Veritas Cluster File System.

VBS is the centerpiece of the HA applications for disaster recovery. VBS is designed to give administrators and business groups a coordinated manner for automated high availability and recovery of multiple, interdependent applications, plus faultless the supporting physical and virtual technologies.

VBS is integrated in Veritas Operations Manager (VOM), Veritas Cluster Server (VCS), Symantec ApplicationHA and Veritas Storage Foundation HA for Windows.

 “We want to give visibility and the ability to automatically recovery entire business servers,” said Dan Lamorena, director of product marketing for Symantec’s storage and availability management group. “In this launch, they expanded a lot of capabilities. There is a lot of automation and scheduling and the ability to discern across business units and discern the interdependencies from the applications to the spindle.”

As an example, an application that goes down could require coordinated efforts of the Web service, application and database groups to restore. Through a centralized view from Veritas Operations Manager, VBS allows those groups to automatically and simultaneously bring the application back into service.

David Chapa, senior analyst for Enterprise Strategy Group, said VBS requires a much deal of coordination between applications and servers throughout an organization. The coordination is handled through Symantec’s VOM, the central management console for faultless of the storage management and HA products.

“You maintain to beget positive faultless the connective tissues are reattached when an application goes down,” said Chapa. “Everything rolls into VOM. VBS is the construct that touches faultless these products. They are simplifying management for availability of applications by focusing on the business problem. Those interdependent servers collectively define a business service.”

VBS is backward compatible with Veritas Cluster Server 5.1 and faultless versions of ApplicationHA.

What else is unusual in HA

The company claimed Veritas Storage Foundation HA for Windows can now fail over business-critical Windows applications in one minute. It also has automated application recovery for Hyper-V machines across wide zone distances and clusters.

The company also said Veritas VirtualStore now clones virtual machines with FileSnap and deduplication, and offers file-level replication of VMWare’s Virtual Machine Disk Format (VMDK) files across sites and clustered iSCSI support for scalable performance for shroud storage over IP.

Veritas Replicator now has volume and file-based replication across multi-vendor storage. Previously, the product only handled volume-based replication. Symantec ApplicationHA now supports Linux and Unix as well as VMware vSphere 5.0.

Storage Foundation adds primary dedupe, compression

Symantec added post-process deduplication and compression to Storage Foundation and Veritas Cluster File System. The data reduction takes residence at the file flat in virtual and physical environments. Chapa said a pre-set window is used in which a pointer is set on original data and then faultless redundant data is targeted thereafter.

“They are targeting virtual machine storage with this because there is a vast amount of redundancies in VMs,” Chapa said. “This is where they are seeing the most traction with this.”

Plus, VOM now can provide management visibility for network attached storage (NAS) environments. Previously, the product focused only on storage zone networks (SANs).

Storage Foundation and VCS  can also now provide predictive visibility into storage reclamation for thin provisioning, so administrators can shrink or expand thinly provisioned storage.


King of the network operating systems | killexams.com real questions and Pass4sure dumps

COMPUTINGFrom...Network World Fusion networking

January 24, 2000Web posted at: 12:11 p.m. EST (1711 GMT)

by John Bass and James Robinson, Network World Test Alliance

(IDG) -- It faultless boils down to what you're looking for in a network operating system (NOS).

Do you want it skinny and springy so you can install it any pass you please? Perhaps administration bells and management whistles are what you necessity so you can deploy several hundred servers. Or maybe you want an operating system that's robust enough so that you sleep infatuation a baby at night?

The suited advice is that there is a NOS waiting just for you. After the rash of recent software revisions, they took an in-depth peep at four of the major NOSes on the market: Microsoft's Windows 2000 Advanced Server, Novell's NetWare 5.1, Red Hat Software's Linux 6.1 and The Santa Cruz Operation's (SCO) UnixWare 7.1.1. Sun declined their invitation to submit Solaris because the company says it's working on a unusual version.

Microsoft's Windows 2000 edges out NetWare for the Network World Blue Ribbon Award. Windows 2000 tops the field with its management interface, server monitoring tools, storage management facilities and security measures.

However, if it's performance you're after, no product came close to Novell's NetWare 5.1's numbers in their exhaustive file service and network benchmarks. With its lightning-fast engine and Novell's directory-based administration, NetWare offers a much ground for an enterprise network.

We establish the latest release of Red Hat's commercial Linux bundle led the list for flexibility because its modular design lets you pare down the operating system to suit the chore at hand. Additionally, you can create scripts out of multiple Linux commands to automate tasks across a distributed environment.

While SCO's UnixWare seemed to lag behind the pack in terms of file service performance and NOS-based administration features, its scalability features beget it a tenacious candidate for running enterprise applications.

The numbers are in

Regardless of the job you saddle your server with, it has to execute well at reading and writing files and sending them across the network. They designed two benchmark suites to measure each NOS in these two categories. To reflect the real world, their benchmark tests regard a wide orbit of server conditions.

NetWare was the hands-down leader in their performance benchmarking, taking first residence in two-thirds of the file tests and earning top billing in the network tests.

Red Hat Linux followed NetWare in file performance overall and even outpaced the leader in file tests where the read/write loads were small. However, Linux did not execute well handling large loads - those tests in which there were more than 100 users. Under heavier user loads, Linux had a drift to quit servicing file requests for a short era and then start up again.

Windows 2000 demonstrated poor write performance across faultless their file tests. In fact, they establish that its write performance was about 10% of its read performance. After consulting with both Microsoft and Client/Server Solutions, the author of the Benchmark Factory testing appliance they used, they determined that the poor write performance could subsist due to two factors. One, which they were unable to verify, might subsist a feasible performance problem with the SCSI driver for the hardware they used.

More significant, though, was an issue with their test software. Benchmark Factory sends a write-through flag in each of its write requests that is conjectural to occasions the server to update cache, if appropriate, and then compel a write to disk. When the write to disk occurs, the write convene is released and the next request can subsist sent.

At first glance, it appeared as if Windows 2000 was the only operating system to reverence this write-through flag because its write performance was so poor. Therefore, they ran a second round of write tests with the flag turned off.

With the flag turned off, NetWare's write performance increased by 30%. This test proved that Novell does indeed reverence the write-through flag and will write to disk for each write request when that flag is set. But when the write-through flag is disabled, NetWare writes to disk in a more efficient manner by batching together contiguous blocks of data on the cache and writing faultless those blocks to disk at once.

Likewise, Red Hat Linux's performance increased by 10% to 15% when the write-through flag was turned off. When they examined the Samba file system code, they establish that it too honors the write-through flag. The Samba code then finds an optimum time during the read/write sequence to write to disk.

This second round of file testing proves that Windows 2000 is dependent on its file system cache to optimize write performance. The results of the testing with the write-through flag off were much higher - as much as 20 times faster. However, Windows 2000 noiseless fell behind both NetWare and RedHat Linux in the file write tests when the write-through flag was off.

SCO honors the write-through flag by default, since its journaling file system is constructed to maximize data integrity by writing to disk for faultless write requests. The results in the write tests with the write-through flag on were very similar to the test results with the write-through flag turned off.

For the network benchmark, they developed two tests. Their long TCP transaction test measured the bandwidth each server can sustain, while their short TCP transaction test measured each server's ability to ply large numbers of network sessions with petite file transactions.

Despite a poor showing in the file benchmark, Windows 2000 came out on top in the long TCP transaction test. Windows 2000 is the only NOS with a multithreaded IP stack, which allows it to ply network requests with multiple processors. Novell and Red Hat snort they are working on integrating this capability into their products.

NetWare and Linux also registered tenacious long TCP test results, coming in second and third, respectively.

In the short TCP transaction test, NetWare came out the pellucid winner. Linux earned second residence in spite of its lack of support for abortive TCP closes, a manner by which an operating system can quickly cleave down TCP connections. Their testing software, Ganymede Software's Chariot, uses abortive closes in its TCP tests.

Moving into management

As enterprise networks grow to require more servers and support more terminate users, NOS management tools become crucial elements in keeping networks under control. They looked at the management interfaces of each product and drilled down into how each handled server monitoring, client administration, file and print management, and storage management.

We establish Windows 2000 and NetWare provide equally useful management interfaces.

Microsoft Management Console (MMC) is the glue that holds most of the Windows 2000 management functionality together. This configurable graphical user interface (GUI) lets you snap in Microsoft and third-party applets that customize its functionality. It's a two-paned interface, much infatuation Windows Explorer, with a nested list on the left and selection details on the right. The console is light to exhaust and lets you configure many local server elements, including users, disks, and system settings such as time and date.

MMC also lets you implement management policies for groups of users and computers using lively Directory, Microsoft's unusual directory service. From the lively Directory management appliance inside MMC, you can configure users and change policies.

The network configuration tools are establish in a sunder application that opens when you click on the Network Places icon on the desktop. Each network interface is listed inside this window. You can add and change protocols and configure, enable and disable interfaces from here without rebooting.

NetWare offers several interfaces for server configuration and management. These tools tender duplicate functionality, but each is useful depending from where you are trying to manage the system. The System Console offers a number of tools for server configuration. One of the most useful is NWConfig, which lets you change start-up files, install system modules and configure the storage subsystem. NWConfig is simple, intuitive and predictable.

ConsoleOne is a Java-based interface with a few graphical tools for managing and configuring NetWare. Third-party administration tools can plug into ConsoleOne and let you manage multiple services. They mediate ConsoleOne's interface is a bit unsophisticated, but it works well enough for those who must maintain a Windows- based manager.

Novell also offers a Web-accessible management application called NetWare Management Portal, which lets you manage NetWare servers remotely from a browser, and NWAdmin32, a relatively simple client-side appliance for administering Novell Directory Services (NDS) from a Windows 95, 98 or NT client.

Red Hat's overall systems management interface is called LinuxConf and can evade as a graphical or text-based application. The graphical interface, which resembles that of MMC, works well but has some layout issues that beget it difficult to exhaust at times. For example, when you evade a setup application that takes up a lot of the screen, the system resizes the application larger than the desktop size.

Still, you can manage pretty much anything on the server from LinuxConf, and you can exhaust it locally or remotely over the Web or via telnet. You can configure system parameters such as network addresses; file system settings and user accounts; and set up add-on services such as Samba - which is a service that lets Windows clients accumulate to files residing on a Linux server - and FTP and Web servers. You can apply changes without rebooting the system.

Overall, Red Hat's interface is useful and the underlying tools are powerful and flexible, but LinuxConf lacks the polish of the other vendors' tools.

SCO Admin is a GUI-based front terminate for about 50 SCO UnixWare configuration and management tools in one window. When you click on a tool, it brings up the application to manage that item in a sunder window.

Some of SCO's tools are GUI-based while others are text-based. The server required a reboot to apply many of the changes. On the plus side, you can manage multiple UnixWare servers from SCOAdmin.

SCO also offers a useful Java-based remote administration appliance called WebTop that works from your browser.

An eye on the servers and clients

One essential administration chore is monitoring the server itself. Microsoft leads the pack in how well you can hold an eye on your server's internals.

The Windows 2000 System Monitor lets you view a real-time, running graph of system operations, such as CPU and network utilization, and recollection and disk usage. They used these tools extensively to determine the consequence of their benchmark tests on the operating system. Another appliance called Network Monitor has a basic network packet analyzer that lets you discern the types of packets coming into the server. Together, these Microsoft utilities can subsist used to compare performance and capacity across multiple Windows 2000 servers.

NetWare's Monitor utility displays processor utilization, recollection usage and buffer utilization on a local server. If you know what to peep for, it can subsist a powerful appliance for diagnosing bottlenecks in the system. Learning the sense of each of the monitored parameters is a bit of a challenge, though.

If you want to peep at performance statistics across multiple servers, you can tap into Novell's Web Management Portal.

Red Hat offers the yardstick Linux command-line tools for monitoring the server, such as iostat and vmstat. It has no graphical monitoring tools.

As with any Unix operating system, you can write scripts to automate these tools across Linux servers. However, these tools are typically cryptic and require a high flat of proficiency to exhaust effectively. A suite of graphical monitoring tools would subsist a much addition to Red Hat's Linux distribution.

UnixWare also offers a number of monitoring tools. System Monitor is UnixWare's simple but limited GUI for monitoring processor and recollection utilization. The sar and rtpm command-line tools together list real-time system utilization of buffer, CPUs and disks. Together, these tools give you a suited overall view of the load on the server.

Client administration

Along with managing the server, you must manage its users. It's no astound that the two NOSes that ship with an integrated directory service topped the field in client administration tools.

We were able to configure user permissions via Microsoft's lively Directory and the directory administration appliance in MMC. You can group users and computers into organizational units and apply policies to them.

You can manage Novell's NDS and NetWare clients with ConsoleOne, NWAdmin or NetWare Management Portal. Each can create users, manage file space, and set permissions and rights. Additionally, NetWare ships with a five-user version of Novell's ZENworks tool, which offers desktop administration services such as hardware and software inventory, software distribution and remote control services.

Red Hat Linux doesn't tender much in the pass of client administration features. You must control local users through Unix permission configuration mechanisms.

UnixWare is similar to Red Hat Linux in terms of client administration, but SCO provides some Windows binaries on the server to remotely set file and directory permissions from a Windows client, as well as create and change users and their settings. SCO and Red Hat tender support for the Unix-based Network Information Service (NIS). NIS is a store for network information infatuation logon names, passwords and home directories. This integration helps with client administration.

Handling the staples: File and print

A NOS is nothing without the ability to participate file storage and printers. Novell and Microsoft collected top honors in these areas.

You can easily add and maintain printers in Windows 2000 using the print administration wizard, and you can add file shares using lively Directory management tools. Windows 2000 also offers Distributed File Services, which let you combine files on more than one server into a lone share.

Novell Distributed Print Services (NDPS) let you quickly incorporate printers into the network. When NDPS senses a unusual printer on the network, it defines a Printer Agent that runs on the printer and communicates with NDS. You then exhaust NDS to define the policies for the unusual printer.

You define NetWare file services by creating and then mounting a disk volume, which also manages volume policies.

Red Hat includes Linux's printtool utility for setting up server-connected and networks printers. You can also exhaust this GUI to create printcap entries to define printer access.

Linux has a set of command-line file system configuration tools for mounting and unmounting partitions. Samba ships with the product and provides some integration for Windows clients. You can configure Samba only through a cryptic configuration ASCII file - a grave drawback.

UnixWare provides a springy GUI-based printer setup appliance called Printer SetUp Manager. For file and volume management, SCO offers a appliance called VisionFS for interoperability with Windows clients. They used VisionFS to allow their NT clients to access the UnixWare server. This service was light to configure and use.

Storage management

Windows 2000 provides the best tools for storage management. Its graphical Manage Disks appliance for local disk configuration includes software RAID management; you can dynamically add disks to a volume set without having to reboot the system. Additionally, a signature is written to each of the disks in an array so that they can subsist moved to another 2000 server without having to configure the volume on the unusual server. The unusual server recognizes the drives as members of a RAID set and adds the volume to the file system dynamically.

NetWare's volume management tool, NWConfig, is light to use, but it can subsist a exiguous confusing to set up a RAID volume. Once they knew what they were doing, they had no problems formatting drives and creating a RAID volume. The appliance looks a exiguous primitive, but they give it high marks for functionality and ease of use.

Red Hat Linux offers no graphical RAID configuration tools, but its command line tools made RAID configuration easy.

To configure disks on the UnixWare server, they used the Veritas Volume Manager graphical disk and volume administration appliance that ships with UnixWare. They had some problems initially getting the appliance to recognize the drives so they could subsist formatted. They managed to work around the disk configuration problem using an assortment of command line tools, after which Volume Manager worked well.

Security

While they did not probe these NOSes extensively to expose any security weaknesses, they did peep at what they offered in security features.

Microsoft has made significant strides with Windows 2000 security. Windows 2000 supports Kerberos public key certificates as its primary authentication mechanism within a domain, and allows additional authentication with smart cards. Microsoft provides a Security Configuration appliance that integrates with MMC for light management of security objects in the lively Directory Services system, and a unusual Encrypting File System that lets you designate volumes on which files are automatically stored using encryption.

Novell added support for a public-key infrastructure into NetWare 5 using a public certificate schema developed by RSA Security that lets you tap into NDS to generate certificates.

Red Hat offers a basic Kerberos authentication mechanism. With Red Hat Linux, as with most Unix operating systems, the network services can subsist individually controlled to increase security. Red Hat offers Pluggable Authentication Modules as a pass of allowing you to set authentication policies across programs running on the server. Passwords are protected with a shadow file. Red Hat also bundles firewall and VPN services.

UnixWare has a set of security tools called Security Manager that lets you set up varying degrees of intrusion protection across your network services, from no restriction to turning faultless network services off. It's a suited management time saver, though you could manually modify the services to achieve the same result.

Stability and frailty tolerance

The most feature-rich NOS is of exiguous value if it can't hold a server up and running. Windows 2000 offers software RAID 0, 1 and 5 configurations to provide frailty tolerance for onboard disk drives, and has a built-in network load-balancing feature that allows a group of servers to peep infatuation one server and participate the same network designation and IP address. The group decides which server will service each request. This not only distributes the network load across several servers, it also provides frailty tolerance in case a server goes down. On a lesser scale, you can exhaust Microsoft's Failover Clustering to provide basic failover services between two servers.

As with NT 4.0, Windows 2000 provides recollection protection, which means that each process runs in its own segment.

There are also backup and restore capabilities bundled with Windows 2000.

Novell has an add-on product for NetWare called Novell Cluster Services that allows you to cluster as many as eight servers, faultless managed from one location using ConsoleOne, NetWare Management Portal or NWAdmin32. But Novell presently offers no clustering products to provide load balancing for applications or file services. NetWare has an intricate recollection protection scheme to segregate the recollection used for the kernel and applications, and a Storage Management Services module to provide a highly springy backup and restore facility. Backups can subsist all-inclusive, cover parts of a volume or store a differential snapshot.

Red Hat provides a load-balancing product called piranha with its Linux. This package provides TCP load balancing between servers in a cluster. There is no difficult restrict to the number of servers you can configure in a cluster. Red Hat Linux also provides software RAID support through command line tools, has recollection protection capabilities and provides a rudimentary backup facility.

SCO provides an optional feature to cluster several servers in a load-balancing environment with Non-Stop Clustering for a high flat of fault-tolerance. Currently, Non-Stop Clustering supports six servers in a cluster. UnixWare provides software RAID support that is managed using SCO's On-Line Data Manager feature. faultless the yardstick RAID levels are supported. Computer Associates' bundled ArcServeIT 6.6 provides backup and restore capabilities. UnixWare has recollection protection capabilities.

Documentation

Because their testing was conducted before Windows 2000's common availability ship date, they were not able to evaluate its hard-copy documentation. The online documentation provided on a CD is extensive, useful and well-organized, although a Web interface would subsist much easier to exhaust if it gave more than a yoke of sentences at a time for a particular serve topic.

NetWare 5 comes with two manuals: a detailed manual for installing and configuring the NOS with suited explanations of concepts and features along with an overview of how to configure them, and a petite spiral-bound booklet of quick start cards. Novell's online documentation is very helpful.

Red Hat Linux comes with three manuals - an installation guide, a getting started pilot and a reference manual - faultless of which are light to follow.

Despite being the most difficult product to install, UnixWare offers the best documentation. It comes with two manuals: a system handbook and a getting started guide. The system handbook is a reference for conducting the installation of the operating system. It does a suited job of reflecting this painful experience. The getting started pilot is well-written and well-organized. It covers many of the tools needed to configure and maintain the operating system. SCO's online documentation looks nice and is light to follow.

Wrapping up

The bottom line is that these NOSes tender a wide orbit of characteristics and provide enterprise customers with a much deal of election regarding how each can subsist used in any given corporate network.

If you want a good, common purpose NOS that can deliver enterprise-class services with faultless the bells and whistles imaginable, then Windows 2000 is the strongest contender. However, for high performance, enterprise file and print services, their tests flaunt that Novell leads the pack. If you're willing to pay a higher charge for scalability and reliability, SCO UnixWare would subsist a safe bet. But if you necessity an inexpensive alternative that will give you bare-bones network services with decent performance, Red Hat Linux can certainly meet the bill.

The election is yours.

Bass is the technical director and Robinson is a senior technical staff member at Centennial Networking Labs (CNL) at North Carolina situation University in Raleigh. CNL focuses on performance, capacity and features of networking and server technologies and equipment.

RELATED STORIES:

Debate will focus on Linux vs. LinuxJanuary 20, 2000Some Windows 2000 PCs will jump the gunJanuary 19, 2000IBM throws Linux lovefestJanuary 19, 2000Corel Linux will evade Windows appsJanuary 10, 2000Novell's eDirectory spans platformsNovember 16, 1999New NetWare embraces Web appsNovember 2, 1999Microsoft sets a date for Windows 2000October 28, 1999

RELATED IDG.net STORIES:

Fusion's Forum: Square off with the vendors over who has the best NOS(Network World Fusion)How they did it: Details of the testing(Network World Fusion)Find out the tuning parameters(Network World Fusion)Download the Config files(Network World Fusion)The Shootout results(Network World Fusion)Fusion's NOS resources(Network World Fusion)With Windows 2000, NT grows up(Network World Fusion)Fireworks expected at NOS showdown(Network World Fusion)

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Novell, Inc.Microsoft Corp.The Santa Cruz Operation, Inc. (SCO)Red Hat, Inc.

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