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To: Road Walker who wrote (12048)2/7/2001 8:03:02 AM
From: Bob Kim  Respond to of 17183
 
John, The systems comes with backup power supplies and usually a mechanism for offloading to disk drives if the power problem persists. I guess Flash could be used in the backup role. I'm not an expert, but I think there is a limitation for primary use in a high transaction environment because writing to flash can be slow in relative terms.



To: Road Walker who wrote (12048)2/7/2001 2:06:40 PM
From: Gus  Respond to of 17183
 
John,

The principle at work is that semiconductor memory is at least two magnitudes (20x) faster than disk drives so by putting what is essentially a large bank of special memory chips in between the processors and the main storage device, performance can be increased since the ratio of cache hits to cache misses is going to be very high. A cache hit occurs when the processor requests for data that is already in the solid-state disk.

Gus


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