Exadata Technical Overview - Oracle
Exadata Technical Overview - Oracle
Exadata Technical Overview - Oracle
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38<br />
<strong>Exadata</strong> Smart Flash Cache Write-Back<br />
Writes I/Os<br />
1 Million 8K<br />
Write IOPs<br />
from SQL<br />
Copyright © 2012, <strong>Oracle</strong> and/or its affiliates. All rights reserved.<br />
� Caches Write I/Os in PCI flash in addition to Read I/Os<br />
� Transparently accelerates write intensive workloads<br />
– 20X more write IOPS than disk on X3<br />
– 10X more write IOPs than disk on V2 and X2<br />
� Persistent write cache speeds database recovery<br />
� <strong>Exadata</strong> Flash Cache is much more effective than flash<br />
tiering architectures used by others<br />
– Caches current hot data, not yesterday’s<br />
– Caches data in granules 8x to 16x smaller than tiering<br />
� Greatly improves the effectiveness of flash<br />
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