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Which action will Veritas Cluster Server (VCS) take when dbsg faults if it is currently online on sym1?
The service group is shut down by VCS.
The service group fails over if another node exists in the same zone.
The service group fails over to another node within the other zone.
The service group restarts on the same node.
What is an advantage of using Endpoint Discover over Network Discover?
Ability to pause an in-progress scan
Ability to schedule the scans
Ability to scan online machines
Ability to scan many machines in parallel
Which type of resources are considered by Veritas Cluster Server when determining whether a service group is online?
What should a system administrator do to stop a detection server?
Access the Enforce Server Detail page and select "Done"
Access the Server Detail page and select "Stop"
Access a command prompt and enter the command "net stop service VontuMonitor"
Access the services panel and stop the VontuMonitorController service
Which statement describes a DLP Agent encryption feature?
The key size is standard and unconfigurable.
The key is randomly generated for the agent store.
The system administrator can generate a unique authentication key.
DLP Agent-to-server communication uses Secure Socket Layer (SSL).
What is the sequence of message processing for Network Monitor?
Packet Capture -> File Reader -> Incident Writer
Detection -> Packet Capture -> Incident Writer
Incident Persister -> Manager -> Notifier
Incident Persister -> File Reader -> Manager
What is the recommended deployment location for Network Monitor?
Inside the secured corporate LAN
Within the demilitarized zone (DMZ)
In its own isolated virtual LAN (VLAN)
On the WAN side of the corporate router
Veritas VCS-253 Exam (Administration of Veritas Cluster Server 6.0 for UNIX) Detailed Information
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VCS-253 Administration of Veritas Cluster Server 6.0 for UNIX
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Test Code : VCS-253
Test Name : Administration of Veritas Cluster Server 6.0 for UNIX
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Administration of Veritas Cluster Server 6.0 for UNIX book
Clusters' ultimate Stand | VCS-253 Real Questions and VCE Practice Test
To make sure, the expertise is struggling a picture problem,many VARs suppose of it as it became in its early days. lower back then, clustering applied sciences had been effortlessly mating two servers together. The servers ran the same OS, used the identical hardware configuration and helped to handle hardware failures gracefully. but today, as internet and database purposes have multiplied in visibility, clustering is plenty less monogamous and,subsequently,greater exciting, interesting and difficult for solution suppliers.
these changes have come about because of two mighty forces: purposes have turn into greater mindful and able to clustering technologies, and applications companies have turn into more dissatisfied with the pace of innovation around clustering on Intel/notebook hardware and Microsoft home windows OS application. as a result, clustering has branched out past simply the OS and is now dealt with directly through many essential functions, such as Oracle databases, and by storage carriers, similar to Veritas.
"shoppers' needs are different, and we need all these different techniques," says Arun Taneja, a senior analyst at analyst company business Storage group, Milford, Mass.
Clustering PrimerAt its coronary heart, clustering is a really basic thought, however with lots of advanced subtleties that can bedevil the savviest VAR: Tie collectively two or extra servers with quite a lot of hardware and application tools and hints, and permit them to hold operating if any one element fails. Clustering actually encompasses a few distinct notions. First and most useful is excessive availability. That capacity that there is not any single element of failure, and sometimes an excellent deal greater developed-in redundancy if more than one part fails. part of the thought of high availability includes failover and failback healing. If a component fails, the relaxation of the cluster continues to operate, and once the failed part is brought again online, the newly fixed system can also be brought back in synch with the relaxation of the cluster.
solution providers today have their alternative of clustering methods, but they even have the accountability to bone up on these new technologies and strategies of helping more authentic purposes. For providers to be constructive, they may should alternate their own loyalties, remixing their items, platforms and programs to leverage the brand new breeds of clustered purposes. To play in this space, providers will need to turn into more proactive in marrying clustering options with their consumers.
At its core, clustering includes the duplication of pretty much every computer element,from disk drives to processors to community adapters. In case one item fails, the working twin (or triplicate, or quadruplicate, depending on how many replicated servers are part of the cluster) soldier on, without the applications missing a beat.
"Clustering is foremost for a database-pushed software as a result of synchronization concerns concerning redundancy," says Capel English, CTO of SNAPS, an integration company specializing in significant-scale fax-server methods that consist of clustering.
it truly is why it be got so a lot purchase-in from huge vendors, together with Oracle. Oracle's clustering technology "has taken us more than 10 years to advance and is a step forward within the industry," says Robert Shimp, vice president of database marketing for Oracle. "it be making a revolution in the trade. loads of carriers are coming out with clustering solutions. Clustering drops the can charge of computing dramatically, along with dramatically enhancing purposes' reliability. It also makes Linux a lots more plausible option in business computing."
returned in its monogamous days, clustering become strictly the province of the OS: You needed specialized types of Unix and home windows to be capable of help redundant, tightly coupled file servers and handle hardware failures devoid of losing data or individual transactions.
but as net and database applications have grown in prominence, so, too, has the need for specialised functions-layer clustered solutions, and those have begun to complicate the want for OS-layer clustered services. The subject, of path, is the information. preserving it intact, synchronized and accessible in case of a failed part has become extra complex as web, database and applications servers engage and share assistance. The OS-layer clusters can not retain song of individual transactions, as a result of they operate on gross-file ranges. That makes clustering a tougher answer for resellers and integrators to install.
Clustering is more than just parallel processing or its latest incarnation known as server blades,servers on add-in cards that add multiprocessing horsepower. Such strategies marry a number of computers collectively for selected functions and have develop into extra common as hardware costs drop.
"we have seen that on the low conclusion of the market, where individuals are relocating towards ganging collectively a bunch of commodity computers and spreading the workload over them," says Dan Kusnetzky, researcher IDC's vice president of equipment software analysis. "Of route, you have to be capable of spoil up your software into separate items and then assemble the effects collectively. this may lower the charge of hardware and use decrease-cost licenses or open source and get the identical work done for a decrease budget."
a more in-depth LookClustering encompasses numerous situations, in line with analysts and companies (see "allow us to count number the techniques," web page 32). Storage and applications-connected clustering usathe ante for both integrators and shoppers. "Clustering is a logical extension of primary redundancy. We wouldn't typically take a consumer to that stage except they'd the basics already in place,strong backup, distinctive NICs in each server, dissimilar switches, correct vigour coverage etc," says Neil Rosenberg, CEO at quality know-how options, South Orange, N.J., a network integrator providing clustering solutions to midsize agencies in the metro manhattan location.
"in spite of the fact that the technology for hardware clustering has been around for years, it has now not been adopted by means of medium to small agencies. utility programmers understand little about hardware and do not understand a way to design for clustering," says Hal Lavender, chief architect at Cognizant applied sciences, a leading company of customized-software building.
The refocusing of clustering on purposes has took place for other explanations as well, two of which consist of the older OS clustering models falling victim to excessive pricing and their restrained functions assist.
When it comes to clustering, rate is a controversy. There are more suitable and cheaper options to featuring fault-tolerant functions than clustering accessible from Microsoft or versions of Unix from HP/Compaq, sun and others. One example is the LifeKeeper application product from SteelEye, which runs on each Unix and home windows and may supply support for a number of distinctive applications. An alternative on the hardware aspect is the specific line of fault-tolerant servers from NEC that run windows 2000 and can be found in configurations for only $25,000.
"ninety one;the brand new HP makes it very convenient to get begun with their CL380 packaged cluster bundle," says Rosenberg, who sells numerous this configuration to midsize companies. "it's a superb answer for shoppers trying to find gigantic disk ability and server failover with home windows 2000 Server or with NetWare 6.
but expense is rarely the most effective difficulty. "we're seeing only a few purposes that are cluster-mindful," says Doug Garcia, vice chairman of revenue at QuestingHound, an answer issuer based mostly in Lighthouse aspect, Fla., that concentrates on safety and networking capabilities. inserting clustering services inner the OS does not make a lot feel unless those services can aid a wide variety of functions devoid of too an awful lot effort. And therein lies the rub, since the effort to make functions cluster-mindful is odious, requiring the use of special scripts, programming interfaces or different techniques which are most effective for essentially the most experienced builders.
it's where Oracle's true utility Cluster (RAC) comes into play. RAC still requires clustered OSs and storage options, so it's an addition,now not a replacement,to those technologies. however the key here is that it runs all present Oracle purposes without any modification, and offers a layer of redundancy and scalability that isn't possible with simply OS and storage-clustering solutions. "RAC runs with any packaged app on the earth, and it runs across the board on various OSs," Oracle's Shimp says. "it is why customers care. we now have a whole bunch of customers the usage of this for massive functions. it's a really subtle piece of software and RAC offers massive discounts if you happen to compare it with the cost of a multiprocessing system."
home windows Vs. UnixMicrosoft has had three major complications with clustering and has been 2nd to the a lot of Unix carriers. First, Microsoft windows has lagged in the back of Unix in terms of supporting varied-machine clusters. second, it has no longer protected clustering aid for a lot of purposes into windows, beside its personal servers, equivalent to SQL Server, trade and information superhighway information Server. Third, even with guide for its own servers, integrators still needed to make modifications to purposes to make them cluster-mindful.
"When it involves sophistication in clustering application, Microsoft is a babe within the woods," Taneja says. "folks like Veritas, Legato, IBM and sun are an awful lot extra subtle,they can handle sixteen or 32 clustered servers, and have had more than eight server types accessible for two or three years, whereas Microsoft is barely popping out with this assist later this year," he says.
"Our clustering story needs to be enhanced," says Stan Sorensen, director of SQL Server advertising for Microsoft. "we have a advertising difficulty and a few work to do there, however we now have an excellent foundation on which to construct. obviously, we recognize we can make it enhanced,we are looking to be in a position to scale as much as multiple laptop clusters. we are definitely constrained by using state-of-the-art hardware."
Many resellers and integrators agree: "If an conclusion person definitely wants clustering, they deserve to be using Unix or Linux for allotted processing," Garcia says. Oracle's Shimp also recommends Linux. "Linux dramatically lowers the cost of hardware and nevertheless achieves a great pleasant of provider. Linux is extremely eye-catching for clustering."
To make matters greater complicated, diverse types of windows support distinct configurations and numbers of nodes per cluster (see "Microsoft Clustering Specs," correct). youngsters, Microsoft has made issues a little bit more convenient with the greater recent models of home windows. "windows load-balancing capabilities in advanced Server made it true convenient to get issues install. You should not have to be a rocket scientist to configure this," says Tom Rizzo, community product manager for SQL Server at Microsoft. "All Microsoft servers such as change, web suggestions Server and SQL Server assist clustering," he says.
included in all copies of home windows 2000 are the programming interfaces for clustering, so developers can write clustered purposes on any Win2k version. despite the fact, they can simplest install them on either advanced or Datacenter Server types.
Keys To Clustering"Clustering forces our builders to have some capabilities of the hardware ambiance and the administration staff to be aware fundamental architectural and software-design parameters," Cognizant's Lavender says. "as an instance, network administrators ought to be extra careful about designing directories and how failovers turn up from one machine to one other."
Scalability is subsequent. Having numerous servers skill which you can share their computing vigor and balance the average processing load. notice that here's different from multiprocessing servers that contain a number of CPUs in a single cabinet: The clusters comprise as a minimum two separate machines. Some clustering features guide up to eight or extra individual nodes. but having greater nodes is rarely all the time a much better deal: "In our environment, greater than two nodes would not in fact buy you anything else," English says.
Third is the potential to manage the cluster as a single entity. conclusion users, and functions and community administrators can have a single point of handle over the cluster. There are numerous parameters, such as how the particular person nodes of the cluster are connected together; even if the cluster is homogeneous in order that each computing device is an exact replica when it comes to processor, community adapter and different configuration details; and even if any particular application is required on every network client to access the clustered resources. Any management scheme will should keep in mind those diversifications.
eventually, clustering style is vital. A cluster can share a single disk array, in order that multiple copies of the equal software (corresponding to a database or internet server) have entry to the identical file device. Or each and every node within the cluster can take ownership of its own disk supplies. Clusters can also be connected collectively the usage of commonplace Ethernet cabling, a shared SCSI bus to connect disk
drives to distinctive servers, or a committed deepest link among the many servers besides the community connection (see "basic Clustering bill-of-materials record," web page 36). a typical cluster can also be energetic/lively, that means that separate copies of the software are operating at the same time as on all nodes of the cluster. If one node fails, the application will continue seamlessly and be picked up with the aid of the different nodes. on the other hand, clusters will also be lively/passive, which means that only 1 node of the cluster is operating the application while the others operate as scorching spares.
how you configure your cluster is dependent upon cost and the residences of your underlying OS and applications: Some combos only guide one class of configuration.
"Some consumers don't like the concept of the passive node sitting there doing nothing however awaiting the active node to fail over," English says. Passive configurations "require that you just purchase twice as lots hardware as you need to aid your creation atmosphere," Lavender says. "That capacity it's invariably cost-prohibitive and seldom used."
solution-provider ConcernsSuch issues make clustering a hard sell for solution providers. They should learn the way to specify, configure, set up and guide clusters. That requires a superb deal of up-entrance effort, and continuing schooling as clustering evolves in the course of the years.
now and again, the margins don't seem to be extensive ample to justify this variety of effort: "Hardware and software are very nearly commodities," Rosenberg says. "The work,and the income,is in the design and integration services." That means that integrators relying just on hardware income are going to have a troublesome time making any cash promoting clustered options, until they consist of expenses for his or her services as a part of the kit.
numerous practicing classes are available that may help
integrators. "With the right substances, and for a common installing, an skilled, mighty engineer can decide upon this up and run with it. We used several books and a three-day Microsoft/Compaq practising session held in the neighborhood to rise up to speed on clustering," Rosenberg says.
Such practicing is basic as a result of the really expert nature of clustering. "Most valued clientele are either without the really expert journey and skill levels, or have the skill onboard however can not spare them from other crucial areas," Garcia says.
"Many clients don't seem to be prepared for the complexity and help considerations of clustered purposes. You must take it on an software-by way of-software basis, and find out about licensing necessities, really good drivers and interfaces, and any enhancements which are mandatory," he says. "in many cases, their funds can be more desirable spent on excessive-availability servers reminiscent of NEC's Fault Tolerant Platform. About ninety five % of the requests we get for clustering are only for prime-availability servers, and we'd fairly suggest a fault-tolerant solution that has less complicated implementation and reduce can charge of possession."
Veritas And OracleFinally, VARs can go the route of the use of clustering provided by means of the software companies themselves,both leading carriers are Veritas and Oracle. Cluster Server from Veritas supports a big range of home windows and Unix clusters and storage configurations. Lavender is a large fan of Veritas' clustering software on each Unix and home windows.
"Veritas' providing is both vendor-impartial and packed with points that always meet the wants of any software," he says. "although, Microsoft's Clustering carrier remains in its infancy."
"software clustering allows for users to resubmit a transaction and have it processed consistently on the different nodes in the cluster automatically after a failure happens," Lavender says. "software clustering can perpetually be configured to deliver load-balancing between circumstances/nodes so in common operation, load-balancing will also be used to improve basic gadget throughput. Hardware clustering, however, ensures that after a quick length,customarily a couple of seconds to a few minutes,that transaction can once again be processed."
Oracle's RAC items a single database image for any purposes, yet handles failover and failback situations. "It has best been on the market for about a yr, and a small percent of our shoppers are the use of it," Oracle's Shimp says. "whereas the uptake is small, it is encouraging to us." And, not like Microsoft's clustering answer, RAC doesn't require any amendment to present applications. "You can't in reality run any clustered purposes with SQL Server; you possibly can should make a customized application to make clustering work," he says.
Of course, there are downsides, as smartly. "Oracle's RAC is awfully problematic to deploy and not every utility must be done that method," Taneja says. "RAC makes sense for aiding one gigantic database and if you happen to want to be certain that you've got two or greater servers to give enhanced performance."
No remember which way an integrator goes on clustering,functions or OS,it continues to be a tough promote and will take some effort to assist. however resellers who can marry the correct solution will discover that clustering can also be a ecocnomic source of profits, and find that these marriages could have staying energy as their purchasers proceed to develop their applications.
"To implement clustering has required comparatively cheap advantage,if you're a VAR, you are going to have to truly give price and understand what you're doing," Taneja says. "because it is complicated, those VARs that take note these concerns can get paid fairly a little bit of cash, because the clustering customer can
actually use that aid.
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