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Generally, SSD read cache is particularly effective when:
Reads are far more common than writes in the production environment, common in live
database or web service applications.
The inferior speeds of HDD reads cause performance bottlenecks.
The size of repeatedly accessed data is smaller than the capacity of the SSD cache.
Figure 10-1
SSD Read and Write Cache
SSD read-write cache is particularly effective when:
Reads and writes mix in the production environment, common in file service
applications.
The inferior speeds of HDD reads and writes cause performance bottlenecks.
Same as SSD read cache case; the size of repeatedly accessed data is smaller than the
capacity of the SSD cache.
Willing to take a little risk to increase write performance because it’s write cache
buffering at SSD cache pool. Of course, these write data in SSD cache can be used at
the next read.
Содержание XCubeSAN XS5224D
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