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Virtualization Management in Software Compose code-128c in Software Virtualization Management




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9. use software barcode standards 128 printer todeploy code 128 code set c in software RoyalMail4SCC Virtualization Management virtual ones, should be im ported into the DCM framework. The DCM tools should be able to manage the assets after they have been imported. After the virtualization layer has been deployed on a system, you can provision VEs and customize them to run speci c workloads.

Resource controls should be applied at this point. Many workloads run the same software but with different data, or as different phases in the software life cycle. Although maintaining consistency between application instances is important, human error is dif cult to avoid in doing so.

VE pro les, or templates, can be used to enforce similarities automatically and expedite the provisioning process. A pro le can include a choice of OS, con guration of network services such as DNS, and other aspects. Capacity planning must also be performed before provisioning.

If the workload cannot meet the required response time, the deployment can be considered a failure. Fortunately, principles of operational exibility, discussed later in this chapter, can be used to solve this problem..

9.1.1.

3 Update and Report Software Code128 Compliance All hypervisors, operating systems, and applications are eventually updated with both enhancements and xes to bugs. Manually tracking the status of dozens of updates to hundreds or even thousands of individual entities can be an impossible task. Data center software is able to reduce this burden signi cantly by automating many of the processes and verifying the status of updates.

Virtualization complicates the situation by adding another layer of entities on a physical computer. A non-virtualized computer has only one status for an entire OS package. A computer with 16 VEs, however, may have as many as 16 different levels of updates for that one package.

You can use DCM tools to group similar assets and easily perform actions that they all need. For example, three OS updates can be applied to 50 Apache web servers running in 50 VEs spread over 6 computers, all in one operation run from a centralized console. If the DCM tool supports a browser user interface (BUI), it may even be possible to perform this action remotely.

You cannot achieve compliance with data center policies without knowing what is installed on your computers and how they are con gured. To this end, DCM tools should provide charts that reveal at a glance which systems and VEs are out of compliance, along with an explanation of the problem. They should also generate compliance reports for archival and for regular audits.

9.1.1.

4 Monitor and Audit Usage Proactive support of computer systems and their workloads requires understanding their current health. A VE s health can be evaluated using current performance characteristics and trends as well as activity patterns and access attempts..

9.1 VE LIFE-CYCLE MANAGEMENT Who is using the VE Which Software Code 128C applications are they running What is the processing load caused by those applications Are all of those loads expected and normal, and can the system continue to provide suf cient resources if current trends continue and expected changes occur Individual workloads inevitably grow and shrink over time; likewise, the set of workloads on a system changes over time. If you don t monitor the performance characteristics of your systems, you cannot make plans to avert a performance crisis or system failure. Although most data centers monitor CPU and memory utilization, other measurements are important as well.

Current resource utilization provides little insight into the health of the system or VE. A system running at 85% CPU utilization may be providing the response times needed, but one running at 10% may include a workload providing unacceptable performance for reasons unrelated to CPU performance. Further, the bottleneck in the latter case may be either a physical limitation, such as I/O bus rate, or a con gured limitation, such as a memory cap.

Consolidated systems, including those with multiple VEs, complicate this situation. Is a VE not meeting the desired response time because system resources are insuf cient, or because a resource control is overly aggressive, or because another VE does not have a suf ciently tight resource control If VEs are owned by different business groups, the initial complaint may come from one group that does not have any visibility into another group s VE, and may simply report that the system is slow. Complete monitoring and tracking of resource utilization and transaction times is necessary to diagnose performance problems.

DCM tools should gather and store the necessary data so that trends can easily be detected. After all, you can avoid a problem only if you can predict it. In addition to performance monitoring, tools are needed to detect inappropriate access and take appropriate action.

An audit trail is used as a record of accesses, and can aid in the analysis of access patterns as well as intrusions and intrusion attempts. Some virtualization tools can audit only low-level I/O transactions such as network connections. All other auditing occurs in the VEs, using the existing auditing method of the OS.

Other methods, such as operating system virtualization (OSV), can perform auditing of VEs in the OS kernel, not in the VE. An intruder who gains access to the VE would not know that there is an audit trail and, therefore, might be less careful about the evidence being generated. Recent changes in the computer industry have yielded a heightened awareness of computer systems and their con gurations.

Conversations about compliance enforcement are now common. One factor contributing to the increased attention being paid to this area has been the lack of automation, which leads to human error in security con guration, system standardization, and auditing..

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