The CACHE parameter controls how CA FAVER uses the cache in cached disk controllers. This can significantly affect performance of CA FAVER export processing.
Syntax
CACHE
►►─┬─────────────────┬────────────────────────────────────────────────────────►◄ ├─ CACHE=INHIBIT ─┤ └─ CACHE=SEQ ◄ ───┘
Operands
The CACHE parameter is specified with the following operands:
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Operand |
Explanation |
|---|---|
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SEQ |
When access is made to disk, CA FAVER instructs the disk controller to pre-stage the next sequential tracks into cache. Tracks that CA FAVER has just read are rapidly de-staged from cache. Using this read-ahead feature of the controller improves CA FAVER EXPORT times, while still minimizing the impact on the cache for other concurrent disk users. |
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INHIBIT |
When access is made to disk, CA FAVER instructs the disk controller not to move any additional tracks to the cache. The tracks are retrieved from cache if they are in cache, but no new tracks are staged into cache. This option eliminates any impact on the cache for other concurrent disk users. |
Usage Rules
The following rules apply:
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