Service manual

Sizing Disk Subsystems
86 Sun ONE Directory Server Installation and Tuning Guide • June 2003
5. Add extra disk space to compensate for error and variation.
Diskspaceforsuffixesisonlypartofthepicture;youmustalsoconsiderhow
Directory Server uses disks.
How the Directory Server Uses Disks
Directory suffixes are part of what Directory Server stores on disk. A number of
otherfactors affecting disk use may vary widely dependingeven on how Directory
Server is used after deployment and so are covered here in general terms. Refer to
the Sun ONE Directory Server Administration Guide for instructions on configuring
the items discussedhere.
Directory Server Binaries
You need approximately 200 MB disk space to install this version of Directory
Server. This estimate is not meant to include space for data, but only for the
product binaries.
Event Logging
Disk use estimates for log files depend on the rate of Directory Server activity, the
type and level of logging, and the strategy for log rotation.
Many logging requirements can be predicted and planned in advance. If Directory
Server writes to logs and inparticular audit logs, diskuse increaseswith load level.
Whenhighloaddeployments callfor extensive logging,planforextradiskspaceto
accommodate the high load. You may decrease disk space requirements for
deployments with high load logging by establishing an intelligent log rotation and
archival system, rotating the logs often, and automating migration of old files to
less expensive, higher capacity storage mediums such as tape or cheaper disk
clusters.
Some logging requirements cannot easily be predicted. Debug logging can cause
temporarybut explosive growth inthe size of the
errors log, for example. For a
large, high load deployment, consider setting aside several gigabytes of dedicated
disk spacefor temporary,high-volumedebuglogging.RefertoChapter 8,“Tuning
Logging,” for further information.