The System Administrator must make many decisions regarding the physical allocation of space to Adaptive Server databases. The major considerations in these choices are:
Recovery – disk mirroring and maintaining logs on a separate physical device provide two mechanisms for full recovery in the event of physical disk crashes.
Performance – for tables or databases where speed of disk reads and writes is crucial, properly placing database objects on physical devices yields performance improvements. Disk mirroring slows the speed of disk writes.
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