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HP0-P19 HP-UX high Availability Using Serviceguard v18

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

Test Code : HP0-P19
Test denomination : HP-UX high Availability Using Serviceguard v18
Vendor denomination : HP
exam questions : 152 real Questions

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HP HP-UX high Availability Using

setting up an HP-UX CSE Serviceguard Cluster | killexams.com real Questions and Pass4sure dumps

This chapter is from the e-book 

I might not Go through each permutation of supported disk and LAN applied sciences. but I attain need to jog your reminiscence about solitary facets Of Failure when it comes to hardware components. i'll Go away it as much as you to accomplish a hardware stock to consequence confident that you should not tolerate an SPOF in your design.

  • SPU: It isn't a requirement for each node in a cluster to subsist configured the exact selfsame manner, from a hardware perspective. It is not not viable to utilize a reduce-powered progress server as a Standby node in case your leading application server fails. recall to assume some time to assume note the performance and excessive availability implications of working consumer functions on a server with a varied configuration.

  • Disk Drives:

  • These are the devices that are surely to fail. consequence confident that you present adequate insurance policy in your operating paraphernalia disks as well as your records disks.

  • applying incredibly available RAID disk arrays improves your chances of now not sustaining an outage due to a solitary disk failure.

  • if you're using Fibre Channel, consequence confident that each node has two divorce connections to your storage contraptions by course of two divorce Fibre Channel switches.

  • ensure that hardware options tolerate dissimilar vigour materials from different sources.

  • application accessories can present RAID capabilities as well; LVM can present RAID 0, 1, 0/1. VxVM can tender RAID 0, 1, 0/1, 1/0, and 5. When employing utility RAID, subsist confident that mirrored disks are on divorce controllers and powered from a divorce vigor give.

  • Networks:

  • Ideally, tolerate at the least one divorce heartbeat LAN.

  • Ideally, tolerate a standby LAN for eachandevery LAN interfaces, together with heartbeat LANs.

  • make the most of numerous bridges/switches between energetic and standby LANs.

  • If making utilize of distinctive routed IP networks between servers and valued clientele, consequence confident that numerous routers are used.

  • make confident that eachandevery individuals of a network can aid dynamic routing.

  • endeavor to consequence the most of essentially the most powerful routing protocols, e.g., RIP2 or even superior OSPF.

  • If making utilize of FDDI, consequence confident that dual attached stations are attached to divorce concentrators.

  • vigor components

  • make confident that you tolerate at the least two unbiased vigour components.

  • impartial vigor elements should subsist fed from two external energy turbines; that includes power deliver companies. assume the situation the dwelling you've got two unbiased vigour feeds into your information core each from XYZ producing enterprise. If XYZ producing enterprise goes "bust" or loses the capability to deliver you with electricity, you're a bit in a pickle. If eachandevery else fails, your second vigor deliver should reach from an onsite generator.

  • always test the capability of your 2d vigor provide to "kick in" seamlessly when your fundamental provide fails.

  • facts middle:

  • You need to account your records middle as an SPOF. how are you going to cope with this? this may hold a calamity recuperation draw together with offsite tape data storage or may well subsist as subtle as an superior cluster solution corresponding to Metrocluster or Continentalclusters incorporating asynchronous information replication over a DWDM or WAN link.

  • ensure that administration knows the implications of now not together with your data core within the universal high Availability Plan.

  • efficiency:

  • should still an utility fail over to an energetic adoptive node, you may tolerate two applications running on one node. attain the patrons of both functions subsist mindful and settle for this?

  • have you set up any carrier flat Agreements together with your person communities concerning particular person utility performance?

  • How will you manipulate the performance of individual applications within the event of a failover to an lively adoptive node?

  • Will you employ technologies akin to technique aid supervisor (PRM) and work Load supervisor (WLM), or depart efficiency management to the fundamental UNIX scheduler?

  • person entry:

  • Do clients need to accomplish a UNIX login to the node it's working their utility?

  • Does the consumer's utility require a UNIX consumer identity to accomplish its own degree of customer authentication?

  • How will you manage proposing consistent UNIX user and community IDs throughout the entire cluster?

  • Do you utilize NIS, NIS+, or LDAP?

  • Do you utilize relied on programs?

  • protection:

  • Do you've got a protection coverage for particular person nodes?

  • Do you've got a safety coverage to your network(s)?

  • Do you tolerate got a security policy for the cluster?

  • Do you tolerate a safety policy for your information middle?

  • Do you've got a safety coverage for users?

  • Does every person involved recognize and assume note your safety policies?

  • Do you employ third-celebration safety consultants to accomplish penetration checks?

  • Does your company tolerate an IT protection branch? in that case, attain they office typical security audits? attain they account the security implications of an HP high Availability Cluster?

  • That may still jog your reminiscence concerning the SPOF and matters regarding the supply of your purposes. As you could see, it's not nearly "throwing" hardware on the problem; there are lots of other technological and technique linked challenges that you'll need to countenance if you're to tender maximized uptime to your valued clientele.

    Let's movement on to show on the mechanics of setting up a primary high Availability Cluster.


    3PAR Utility Storage presents Scalable structure for HP-UX Clusters | killexams.com real Questions and Pass4sure dumps

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    HP Equips management paraphernalia for Multi-OS lead | killexams.com real Questions and Pass4sure dumps

    HP Equips management tools for Multi-OS assist

    In a tide designed to give service suppliers more flexibility in deploying and managing internet-primarily based purposes, Hewlett-Packard commerce has introduced multi-OS lead to a couple of of its management equipment.

    The alterations, which tolerate an consequence on HP’s Toptools, Servicecontrol supervisor, procedure useful resource supervisor, and the HP-UX Workload manager, are intended to nick back the workload of particular person device directors by using allowing elements to subsist provisioned instantly across varied systems.

    in line with HP, the adjustments symbolize its ongoing pains to construct a platform unbiased management offering and consequence it the most effective dealer with a tightly built-in multi-OS management method for windows, HP-UX, and Linux.

    “these days what they are looking to attain is tender one framework for how you attain multi-gadget administration,” says an HP spokesperson near the challenge.

    The paraphernalia that these adjustments move tarry a layer below HP’s OpenView techniques management providing. And while they're hypothetical to subsist used as standalone products, they're wholly integratable with the OpenView providing.

    Toptools, HP’s internet-primarily based administration product, now elements revision management with automatic updates, stronger discovery and stock administration. It furthermore has a brand novel database export device and SQL import appliance allowing superior records manipulation, and improved multi-OS help, together with HP-UX, home windows XP and Linux.

    HP Servicecontrol supervisor, a methods management appliance with net-enabled and command line interfaces, presents novel multi-OS manageability, accelerated scalability as much as 1,024 nodes, and expanded safety through authentication and encryption.

    HP procedure aid supervisor for allocating CPU, reminiscence and disk I/O on HP-UX systems now offers more desirable paraphernalia utilization and dynamic reallocations for Oracle environments through co-functioning with Oracle Database aid manager.

    And HP-UX Workload supervisor is now increasing its capabilities to operate in a excessive-availability, clustered ambiance with the aid of integrating with HP MC/Serviceguard, HP's high-availability clustering solution for HP-UX-based mostly servers. additionally, it permits utility integration to consequence the most of instant skill on claim resources. ICOD makes it viable for the activation of additional processor faculty addressing quickly IT fluctuation needs usually present in an online ambiance.

    Toptools is bundled with every HP Intel IA-32-based mostly server and is accessible immediately. each Servicecontrol supervisor and the technique useful resource manager, that are bundled with each HP-UX-based mostly server, can subsist attainable in September of 2001.

    HP-UX Workload supervisor is available automatically and starts at an estimated U.S. list expense of $5,000.

    With the enhancement’s HP has made to Toptools, Servicecontrol supervisor, technique resource manager, HP-UX Workload supervisor, an HP spokesperson says, “we've deliver a framework in location that permits you to launch functions concurrently on massive server environments.”

    For more tips, hunt advice from www.hp.com (new window>


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

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

    This chapter is from the reserve 

    Now that their cluster is up and running, it needs constant and careful monitoring. In Chapter 10, "Monitoring System Resources," they discussed EMS HA Monitors. EMS HA Monitors can subsist configured to monitor the status of hardware resources as well as faultfinding system resources. A Serviceguard cluster can subsist considered a faultfinding system resource. As such, a cluster can subsist monitored from within the EMS framework to route alarms to users and/or applications such as OpenView networking monitoring tools if the cluster experiences an expected event such as a LAN card or even an entire node failing.

    In Chapter 27, they peer at using the Serviceguard Manager GUI to monitor cluster resources. Whatever appliance you utilize to monitor clusters, you should review eachandevery your IT processes in order to assume into account the requirements of a high Availability Cluster.


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

    Clustered databases tender 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 fancy ASM, CRS, OCR, Vote-disk, etc., and you open to wonder: Am I supporting a database or a gross novel concept?

    Having implemented these databases and having gone through the twinge of supporting one, I can construe you that never in my suffer as a systems administrator tolerate I ever had an application or a database cross the lines of demarcation among systems, storage, clustering, and high availability fancy 10g RAC does. But convergence is inevitable. So here are some guidelines to assist systems/storage administrators in their conclusion to implement 10g RAC. Disclaimer: I am not a DBA, nor attain I pretense to subsist an expert in 10g RAC.

    Do you need RAC?

    The concept of implementing a database cluster (and they are not talking active/passive clustering here) may at first show to resolve eachandevery your database-related problems, but in reality it may become a uphold quagmire, especially if the DBAs are novel 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, consequence 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 subsist 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 tolerate Linux in your environment your plans to implement RAC should not subsist a understanding to implement Linux. Your choice of platform should subsist based primarily on your solace flat and skills.

    One caveat is that Oracle may not release patches and updates for eachandevery platforms at the selfsame time. That is not to construe that point patches will not subsist available should you escalate any issues to Oracle. Another thing to preserve in mind is that Oracle recently switched its primary progress 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 survey 10g first. From a systems perspective this is the most expensive investment you will subsist making, so choose 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 reach as news: Oracle now has a cluster engine-called Cluster Ready Services (CRS)-built into the 10g suite. This engine is particularly necessary when implementing RAC if you settle to furthermore implement service names (see below). This is where you may suffer 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 tolerate been upgraded to comprehend RAC uphold as well. For example, Symantec’s Veritas Storage Foundation suite for 10g RAC is based on the selfsame clustering platform that eachandevery its other clustering packages are based on. If your environment has a lot of (non-RAC) database clusters, this is a very necessary design decision.

    Using third-party clustering engines will allow you to maintain a single, consistent framework across eachandevery your database instances. Additionally, these clustering products tender 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 job of host-based volume management without the need for another volume manager on the system. From DBAs’ perspective, this is exemplar since they don’t tolerate to depend on systems administrators for storage to subsist 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 fancy a value proposition because you don’t need 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 still 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 accurate visibility into how the database objects are distributed across devices presented to it, which means that troubleshooting performance issues or recovering from crashes may subsist challenging.
  • As with CRS, ASM is exemplar in scenarios where budget constraints confine the purchase of third-party volume management software. However, if you tolerate a big installation of third-party volume management software and a mature storage provisioning process, assume a long hard peer at ASM. Its adoption should subsist performed in a planned manner because it’s a novel product.

    What are some of the 10g dependencies?

    SCSI-3 reservations and IO Fencing- The gross belief behind a 10g RAC implementation is that eachandevery nodes participate access to eachandevery 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 tolerate older storage arrays that you are planning to utilize for the novel RAC environment, chances are that either the storage arrays are not configured to ply SCSI reservations or they attain 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, utilize SCSI-3 persistent group reservation (SCSI-3 PGR) to implement a technique known as IO Fencing (sometimes called Disk Fencing), which is a method by which nodes can subsist 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 supersede eachandevery other forms of SCSI reservation technologies, such as SCSI-2 reservations. It is highly advisable to choose 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 preserve eachandevery nodes in the cluster in sync. It furthermore uses a registry (Oracle Cluster Registry, or OCR) to maintain cluster information for eachandevery 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 allotment of an external clustering suite, there are confident benefits to configuring CRS to utilize a file system to store them. The main benefit is that, unlike raw devices, file systems can subsist composed of an underlying structure that has software, hardware, and I/O path redundancy. The other benefit 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 subsist registered to or with CRS. CRS then is ultimately liable for online, offline, and fail-over, and monitoring of eachandevery 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 tolerate 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 tolerate any other external component manage it.

    A simple “meet-in-the-middle” approach that is recommended by vendors such as Symantec is to tolerate their products provide the high availability and performance infrastructure to manage CRS and then in rotate let CRS manage eachandevery the database components. account about it this way: You tolerate an application-CRS-that needs to subsist clustered, and you cluster it using a third-party cluster product. The primary advantage 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 understanding why Oracle is bundling CRS and eachandevery other “goodies” in its database suite is to tolerate a “one-stop shop” for everything needed to manage the database, but whether they are really mature 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 preserve eachandevery 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 eachandevery the other nodes-primarily to prevent data corruption.

    There is one major shortcoming, however: In release 1 of 10g there was no facility to provide high 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 simple RAC, you tolerate to depend on the operating system to provide this character of high availability. If you need 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 supersede 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 high 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 high availability for any network failure. If you tolerate a node that is well configured, there should subsist no understanding to fail an entire database instance over for a solitary network failure. Therefore, it is absolutely necessary to provide network high availability using methods described above.

    Replication-If you are planning to replicate your RAC environment for disaster-recovery purposes, subsist sensible that Oracle’s vehicle of choice for this is Data Guard. If you tolerate already invested in another replication product, such as EMC’s SRDF or something similar, you may tolerate to integrate it yourself or utilize 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 choice of which replication product to utilize 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 capable suite with eachandevery the necessary pieces to bag RAC configured “out of the box.” However, some of the newer components such as CRS, ASM, etc., are still relatively novel and may require a few revisions to consequence them really robust. For now, it may consequence sense to Go with a hybrid approach using best-of-breed technologies from various vendors, including Oracle, for what they attain best.

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



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