U-Line B12115 Service Manual download pdf (Page 48)

General Management Considerations

5-2 Advanced Topologies for Enterprise Deployments

One way of managing log files is by using a "waterfall" approach, i.e. working on one

server or component at a time during non-peak load times. This approach allows a

data center to maintain high availability when a server is taken off-line, or when it is

not brought down properly. Then, when that server or component has restarted, you

can bring down the next server for log file maintenance, for example, one hour later.

You can also automate these tasks with "chron" jobs as a way to ensure this task is

done. For more information, see the Oracle Application Server 10g Administrator’s Guide.

5.1.2 Periodic Restarting of OC4J

For increased performance of OC4J, Oracle recommends regular restarting of OC4J.

Sometimes memory leaks from applications or from the virtual machine (VM) within

OC4J itself can degrade application server performance. You determine how often you

need to restart OC4J based on daily observation and if automatic restarting does not

happen. Your business needs may also affect how often you’ll have to restart OC4J.

5.1.3 Starting and Stopping Servers and Applications

Starting and stopping servers and any applications depends on which servers are

involved and the needs of users and the applications they use. Starting and stopping

servers and applications can be automated through shell scripts and chron jobs as

necessary.

When implementing automated starting and stopping of servers, you should take into

account any applications that need to be started with the server. You should also

consider the effects on high availability while a server is brought down for restarting,

or if a server or application fails to start correctly.

You can also plan stopping and restarting procedures on a tier-by-tier basis. For

example, you may only need to restart the application server, but not the database, in

the case of rolling out patches.

5.1.4 Rolling Out Upgrades, Patches, and Configuration Changes

When rolling out configuration changes for upgrade and patching purposes, you do it

once for each virtual host in httpd.conf. For information on configuring httpd.conf, see

Oracle HTTP Server Administrator’s Guide.

5.1.5 Backup and Recovery

You can use the Archive feature in Oracle Application Server as part of the disaster

and backup and recovery strategies for your enterprise topology. Possible daily

strategies include:

1. Making a complete operating system TAR of the entire code tree.

2. Backup of the file repository (database) for all installation types.

You can also use archives in a development environment where a new server comes

online and you need data for research and development.

Your actual backup and recovery strategies should also take into account your

business needs and security issues.

5.1.6 Taking Advantage of NFS

You can take advantage of NFS in your data center to:

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U-Line B12115 Service Manual Page 48

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