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HP0-P19 HP-UX elevated Availability Using Serviceguard v18

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HP0-P19 exam Dumps Source : HP-UX elevated Availability Using Serviceguard v18

Test Code : HP0-P19
Test title : HP-UX elevated Availability Using Serviceguard v18
Vendor title : HP
: 152 existent Questions

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HP HP-UX elevated Availability Using

developing an HP-UX CSE Serviceguard Cluster | killexams.com existent Questions and Pass4sure dumps

Charles Keenan provides specific tasks for setting up a Serviceguard extreme availability cluster on HP-UX/Linux, including instance commands to capitalize illustrate key facets.

This chapter is from the bespeak 

Chapter Syllabus

  • 25.1 The Cookbook for developing a Serviceguard equipment-less Cluster

  • 25.2 The basics of a Failure

  • 25.3 The fundamentals of a Cluster

  • 25.four The "break up-brain" Syndrome

  • 25.5 Hardware and application issues for developing a Cluster

  • 25.6 checking out critical Hardware before setting up a Cluster

  • 25.7 setting up a Serviceguard equipment-less Cluster

  • 25.8 regular Monitoring

  • this is where they come by right down to the nitty-gritty of setting up a Serviceguard cluster on HP-UX. They mention ideas reminiscent of "mirroring your root disk." The mechanics of performing such tasks aren't covered during this module as a result of they are coated in different places. selected initiatives which are primary for setting up a Serviceguard elevated availability cluster are lined and, where appropriate, screenshots and illustration instructions are used to aid illustrate key elements.

    earlier than they will birth to employ this cookbook, they necessity to bewitch into account what Serviceguard is and what it's making an attempt to obtain. I imply that you just not leap straight to the cookbook (see desk 25-1) because having an understanding of the ideas and barriers of Serviceguard can Have an impact on your selections on how to construct your cluster. each bullet ingredient in the cookbook should exist studied, understood, and implemented carefully. So right here it is.

    table 25-1. Cookbook for constructing a Serviceguard package-much less Cluster

    Cookbook for setting up a Serviceguard package-much less Cluster:

    1. bewitch into account the hardware and application implications of developing a cluster.

    2. installation NTP between complete cluster contributors.

    three. exist confident that any shared LVM extent groups don't appear to exist activated at boot time.

    4. install Serviceguard and any connected Serviceguard patches.

    5. deploy a Quorum Server (optional in a simple cluster).

    6. enable far off access to complete nodes within the cluster.

    7. Create a default ASCII cluster configuration file (cmquerycl).

    8. update the ASCII cluster configuration file.

    9. determine the updated ASCII cluster configuration file (cmcheckconf).

    10. compile and divide the binary cluster configuration file (cmapplyconf).

    eleven. back up LVM constructions of any cluster lock quantity organizations (vgcfgbackup).

    12. start cluster features (cmruncl).

    13. check cluster performance.

    earlier than they come by began, they necessity to commence with the aid of speakme about the unthinkable—a failure. What constitutes a failure? several types of failure will prompt distinctive responses from Serviceguard. here's where they delivery their dialogue.


    3PAR Utility Storage offers Scalable architecture for HP-UX Clusters | killexams.com existent Questions and Pass4sure dumps

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    HP says Itanium, HP-UX now not deceased yet | killexams.com existent Questions and Pass4sure dumps

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  • ultimately week's crimson Hat pinnacle in Boston, Hewlett-Packard vice chairman for trade-standard Servers and software Scott Farrand changed into caught with out PR minders by using ServerWatch's Sean Michael Kerner, and can Have slipped off message a bit of. In a video interview, Farrand reported that HP turned into transferring its approach for mission-critical methods faraway from the Itanium processor and the HP-UX operating paraphernalia and toward x86-primarily based servers and red Hat enterprise Linux (RHEL), via a assignment to convey enterprise-crucial performance to the Linux operating device referred to as project Dragon Hawk, itself a subset of HP's challenge Odyssey.

    venture Dragon Hawk is an exertion to deliver the excessive-availability features of HP-UX, comparable to ServiceGuard (which has already been ported to Linux) to RHEL and the Intel x86 platform with a composite of server firmware and utility. Dragon Hawk servers will shun RHEL 6 and supply the potential to partition processors into as much as 32 remoted virtual machines—a know-how pulled from HP-UX's manner useful resource manager. Farrand talked about that HP became positioning Dragon Hawk as its future mission-important platform. "We certainly aid (Itanium and HP-UX) and esteem complete that, but going ahead their approach for mission-vital computing is transferring to an x86 world," Farrand instructed Kernel. "it exist now not by means of twist of kismet that individuals Have de-committed to Itanium, mainly Oracle."

    HP vice chairman Scott Farrand, interviewed at purple Hat pinnacle by using Sean Michael Kerner of ServerWatch

    since HP continues to exist watching for judgement in its case towards Oracle, that commentary may additionally Have made a few individuals in HP's company critical programs unit choke on their morning coffee. And sources at HP impart that Farrand drifted a diminutive bit off-direction in his comments. The company's respectable line on challenge Odyssey is that it's in parallel to and complementary to the business's investments in Itanium and HP-UX. A source at HP famous Farrand ignored piece of HP's venture Odyssey briefing notes to that effect: "task Odyssey includes endured investment in their based mission-crucial portfolio of Integrity, NonStop, HP-UX, OpenVMS in addition to their investments in constructing future mission-important x86 systems. providing Serviceguard for Linux/x86 is a step toward attaining that mission-critical x86 portfolio."

    assignment Odyssey, youngsters, is HP's transparent highway forward with valued clientele that Have not purchased into HP-UX during the past. with out a capitalize for Itanium previous red Hat Enterprse Linux version 5, and with RHEL being increasingly imperative to HP's approach for cloud computing (and, pending litigation, guide for Oracle on HP servers), perhaps Farrand was just a diminutive bit forward of the commerce in his pronouncement.

    Tip of the hat to Ars reader Caveira for his tip on the ServerWatch story.

     

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    HP-UX elevated Availability Using Serviceguard v18

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    Setting Up an HP-UX CSE Serviceguard Cluster | killexams.com existent questions and Pass4sure dumps

    Charles Keenan provides specific tasks for setting up a Serviceguard elevated availability cluster on HP-UX/Linux, including illustration commands to capitalize illustrate key points.

    This chapter is from the bespeak 

    Chapter Syllabus

  • 25.1 The Cookbook for Setting Up a Serviceguard Package-less Cluster

  • 25.2 The Basics of a Failure

  • 25.3 The Basics of a Cluster

  • 25.4 The "Split-Brain" Syndrome

  • 25.5 Hardware and Software Considerations for Setting Up a Cluster

  • 25.6 Testing critical Hardware before Setting Up a Cluster

  • 25.7 Setting Up a Serviceguard Package-less Cluster

  • 25.8 Constant Monitoring

  • This is where they come by down to the nitty-gritty of setting up a Serviceguard cluster on HP-UX. They mention concepts such as "mirroring your root disk." The mechanics of performing such tasks are not covered in this module because they are covered elsewhere. Specific tasks that are relevant for setting up a Serviceguard elevated availability cluster are covered and, where appropriate, screenshots and illustration commands are used to capitalize illustrate key points.

    Before they can start to employ this cookbook, they necessity to understand what Serviceguard is and what it is trying to achieve. I imply that you not jump straight to the cookbook (see Table 25-1) because having an understanding of the concepts and limitations of Serviceguard can influence your decisions on how to construct your cluster. Each bullet point in the cookbook should exist studied, understood, and implemented carefully. So here it is.

    Table 25-1. Cookbook for Setting Up a Serviceguard Package-less Cluster

    Cookbook for Setting Up a Serviceguard Package-less Cluster:

    1. Understand the hardware and software implications of setting up a cluster.

    2. Set up NTP between complete cluster members.

    3. Ensure that any shared LVM volume groups are not activated at boot time.

    4. Install Serviceguard and any related Serviceguard patches.

    5. Install a Quorum Server (optional in a basic cluster).

    6. Enable remote access to complete nodes in the cluster.

    7. Create a default ASCII cluster configuration file (cmquerycl).

    8. Update the ASCII cluster configuration file.

    9. Check the updated ASCII cluster configuration file (cmcheckconf).

    10. Compile and divide the binary cluster configuration file (cmapplyconf).

    11. Back up LVM structures of any cluster lock volume groups (vgcfgbackup).

    12. Start cluster services (cmruncl).

    13. Test cluster functionality.

    Before they come by started, they necessity to commence by talking about the unthinkable—a failure. What constitutes a failure? Different types of failure will prompt different responses from Serviceguard. This is where they start their discussion.


    3PAR Utility Storage Offers Scalable Architecture for HP-UX Clusters | killexams.com existent questions and Pass4sure dumps

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    Tips on implementing Oracle 10g RAC | killexams.com existent questions and Pass4sure dumps

    Clustered databases offer a variety of advantages, as well as choices and challenges.

    By Ashish Nadkarni

    You’ve heard the rumblings in the hallway: The databases are getting overloaded, and more projects are coming along. There is talk of upgrading Oracle to 10g RAC (Real Application Clusters). Then one day it’s official: You’re asked to uphold the database administrator (DBA) in implementing 10g RAC. But this is not your ordinary database upgrade: You hear terms enjoy ASM, CRS, OCR, Vote-disk, etc., and you commence to wonder: Am I supporting a database or a gross new concept?

    Having implemented these databases and having gone through the pain of supporting one, I can inform you that never in my undergo as a systems administrator Have I ever had an application or a database cross the lines of demarcation among systems, storage, clustering, and elevated availability enjoy 10g RAC does. But convergence is inevitable. So here are some guidelines to assist systems/storage administrators in their decision to implement 10g RAC. Disclaimer: I am not a DBA, nor enact I title to exist an expert in 10g RAC.

    Do you necessity RAC?

    The concept of implementing a database cluster (and they are not talking active/passive clustering here) may at first exhibit to unravel complete your database-related problems, but in reality it may become a uphold quagmire, especially if the DBAs are new to the RAC concept and you are supporting an environment that is radically different from the comfort of the database environments in the company. So before diving into the details, win confident your team spends enough time looking at alternatives, such as simply increasing the processing power of your existing systems instead of clustering a lot of servers and creating a distributed database.

    Which OS platform?

    A common misconception is that RAC is meant to exist implemented on cheap Linux servers, thereby creating a “database farm.” That is not the case: 10g RAC is supported on various platforms, including Solaris, AIX, and HP-UX. If you don’t Have Linux in your environment your plans to implement RAC should not exist a intuition to implement Linux. Your preference of platform should exist based primarily on your solace smooth and skills.

    One caveat is that Oracle may not release patches and updates for complete platforms at the very time. That is not to impart that point patches will not exist available should you escalate any issues to Oracle. Another thing to withhold in mind is that Oracle recently switched its primary development platform from Linux to Solaris. Oracle is furthermore a member of an IBM initiative on future AIX developments. That should give you a clue as to which operating systems will remark 10g first. From a systems perspective this is the most expensive investment you will exist making, so select wisely.

    Which clustering software?

    For those who are used to clustering Oracle databases using third-party clustering software-such as Symantec’s Veritas Cluster Server, Sun Cluster, IBM HACMP, or HP MC/ServiceGuard-this may Come as news: Oracle now has a cluster engine-called Cluster Ready Services (CRS)-built into the 10g suite. This engine is particularly distinguished when implementing RAC if you resolve to furthermore implement service names (see below). This is where you may undergo your first issue of contention between the DBA and systems administration teams.

    Basically, Oracle pushes CRS as a replacement for third-party clustering products. However, the issue is how stable CRS really is. Most other clustering products are in their third or fourth generation and are very stable in non-RAC environments, and some of these products Have been upgraded to involve RAC uphold as well. For example, Symantec’s Veritas Storage Foundation suite for 10g RAC is based on the very clustering platform that complete its other clustering packages are based on. If your environment has a lot of (non-RAC) database clusters, this is a very distinguished design decision.

    Using third-party clustering engines will allow you to maintain a single, consistent framework across complete your database instances. Additionally, these clustering products offer platform/application integration and high-availability options that CRS does not yet provide. In short, CRS is a bundled clustering engine that does not quite compare to the functionality offered by more-mature clustering technologies.

    Which volume management and file system software?

    Oracle now bundles Automated Storage Manager (ASM) in 10g. ASM performs the assignment of host-based volume management without the necessity for another volume manager on the system. From DBAs’ perspective, this is gauge since they don’t Have to depend on systems administrators for storage to exist made available to the database; as soon as the storage is provisioned and made available to the system (in the form of raw devices), ASM can start using it. Although this sounds enjoy a value proposition because you don’t necessity extra volume management software for managing database objects, here are some points to consider:

  • ASM is an Oracle-only product, so for managing non-Oracle applications and other operating system file systems, you will noiseless require third-party volume management;
  • ASM is only bundled in 10g, so non-10g Oracle implementations will require volume management;
  • ASM is a 1.0 version; its performance and stability in big database environments are largely unknown and untested. However, 10g release 2 includes significant changes to ASM; and
  • ASM does not provide precise visibility into how the database objects are distributed across devices presented to it, which means that troubleshooting performance issues or recovering from crashes may exist challenging.
  • As with CRS, ASM is gauge in scenarios where budget constraints confine the purchase of third-party volume management software. However, if you Have a big installation of third-party volume management software and a ripen storage provisioning process, bewitch a long difficult sight at ASM. Its adoption should exist performed in a planned manner because it’s a new product.

    What are some of the 10g dependencies?

    SCSI-3 reservations and IO Fencing- The gross view behind a 10g RAC implementation is that complete nodes partake access to complete database objects. No matter what volume management or clustering software is used, SCSI reservation is a requirement to accomplish this.

    If you are migrating from an older instance or Have older storage arrays that you are planning to employ for the new RAC environment, chances are that either the storage arrays are not configured to handle SCSI reservations or they enact not uphold it at all. Most modern arrays (especially if you are using Fibre Channel) uphold SCSI-3 persistent reservations (SCSI-3 PR). Some clustering engines, such as Veritas’ SFRAC, employ SCSI-3 persistent group reservation (SCSI-3 PGR) to implement a technique known as IO Fencing (sometimes called Disk Fencing), which is a routine by which nodes can exist stopped from accessing shared storage if they are not in a cluster. It allows the cluster engine to “eject a node” from the cluster, thereby protecting shared data.

    SCSI-3 PGR will soon replace complete other forms of SCSI reservation technologies, such as SCSI-2 reservations. It is highly advisable to select a stack that uses SCSI-3 PGR when implementing RAC.

    OCR and vote-disk-Oracle 10g RAC uses the concept of a vote-disk to withhold complete nodes in the cluster in sync. It furthermore uses a registry (Oracle Cluster Registry, or OCR) to maintain cluster information for complete nodes. These two entities are normally configured on raw devices. However, if you are using a clustered volume manager and/or file system as a piece of an external clustering suite, there are inevitable benefits to configuring CRS to employ a file system to store them. The main capitalize is that, unlike raw devices, file systems can exist composed of an underlying structure that has software, hardware, and I/O path redundancy. The other capitalize is that manipulating records for taking backups or creating multiple copies is much easier.

    Service names and CRS-Oracle introduced the concept of service names in 9i that allow you to add a layer of software virtualization over the traditional database instance. There are a variety of benefits to using service names, including dynamic load balancing and transfer between nodes, logical segregation of database traffic based on organizational or application needs, and the faculty to provide application-transparent resource pooling.

    In 10g RAC, Oracle introduced the requirement that dynamic management of service names require that the database exist registered to or with CRS. CRS then is ultimately answerable for online, offline, and fail-over, and monitoring of complete databases objects (such as database instances, listeners, virtual IP addresses and, of course, service names)-very similar to how a third-party cluster agent would function. This presents a problem with managing 10g RAC clusters using third-party cluster software:

    You can Have either CRS or the third-party cluster agent managing databases objects, but not both. Also, once a database is “registered” with CRS, it is almost impossible to Have any other external component manage it.

    A simple “meet-in-the-middle” approach that is recommended by vendors such as Symantec is to Have their products provide the elevated availability and performance infrastructure to manage CRS and then in revolve let CRS manage complete the database components. reflect about it this way: You Have an application-CRS-that needs to exist clustered, and you cluster it using a third-party cluster product. The primary handicap of this approach is that you are now complementing CRS in areas where its own capabilities are scanty and creating a “best-of-both-worlds scenario.” The biggest disadvantage of this approach is cost: The main intuition why Oracle is bundling CRS and complete other “goodies” in its database suite is to Have a “one-stop shop” for everything needed to manage the database, but whether they are really ripen and stable or not is a different story. Adding third-party cluster software adds cost.

    Heartbeats and messaging-In the Oracle world, heartbeats are furthermore known as “interconnects.” They are very similar to the heartbeats used by other clustering engines-a private and/or dedicated network that is exclusively used to withhold complete nodes in sync. CRS uses heartbeats for “cache fusion”-in other words, to ensure writes and reads performed by one node are known and acknowledged by complete the other nodes-primarily to forestall data corruption.

    There is one major shortcoming, however: In release 1 of 10g there was no facility to provide elevated availability for heartbeats using either multiple IP or network interfaces or providing a network interface fail-over mechanism (like Solaris IP Multipathing or Veritas MultiNIC). As a result, if you are implementing a unadulterated RAC, you Have to depend on the operating system to provide this nature of elevated availability. If you necessity to aggregate ports (as with Solaris Trunking or HP-UX APA) you may incur additional licensing costs.

    By default, Oracle uses the UDP protocol for messaging. Some clustering software, such as Sun Cluster and Veritas SFRAC, provides libraries that allow you to replace UDP with their proprietary protocols for this purpose. There is a lot of debate as to whether these are more stable than UDP. Oracle recommends against replacing UDP, but the company supports both configurations. Veritas SFRAC furthermore provides special agents to monitor the heartbeat interfaces using its own messaging protocols to add an additional layer of protection.

    Port aggregation-The limitations posed by CRS with respect to network elevated availability or port aggregation apply to virtual IP addresses as well. CRS handles fail-over of the virtual IP addresses between nodes, but assumes no responsibility for providing local elevated availability for any network failure. If you Have a node that is well configured, there should exist no intuition to fail an entire database instance over for a unique network failure. Therefore, it is absolutely necessary to provide network elevated availability using methods described above.

    Replication-If you are planning to replicate your RAC environment for disaster-recovery purposes, exist alert that Oracle’s vehicle of preference for this is Data Guard. If you Have already invested in another replication product, such as EMC’s SRDF or something similar, you may Have to integrate it yourself or employ third-party cluster agents because Oracle does not provide integration tools.

    Data Guard in 10g has some worthwhile improvements over previous versions and deserves evaluation. However, your preference of which replication product to employ will largely depend on whether you are planning to replicate just the 10g cluster or a lot of non-Oracle applications, because Data Guard only works with Oracle.

    In conclusion, Oracle 10g is a Good suite with complete the necessary pieces to come by RAC configured “out of the box.” However, some of the newer components such as CRS, ASM, etc., are noiseless relatively new and may require a few revisions to win them really robust. For now, it may win sense to Move with a hybrid approach using best-of-breed technologies from various vendors, including Oracle, for what they enact best.

    Ashish Nadkarni is a senior consultant with GlassHouse Technologies (www.glasshouse.com).



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