NEC M110 - Page 50

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2. M310 Component Selection (19)
(6) Cache Memory
It is required to purchase cache memory for M310 disk array unit. Refer the following table when
purchasing it.
a) Cache Model at Purchase
Mode Number Product Name Remarks
NF5332-SC01SE Standard Cache Memory (12GB) Standard Cache Memory (12GB) for M310
NF5332-SC02SE Standard Cache Memory (24GB) Standard Cache Memory (24GB) for M310
b) Cache Capacity Expansion
Cache memory can provide better performance by improving access times to frequently accessed data
and can significantly improve on write performance. In order to reduce the occurrence of cache
overflow conditions in high performance environments, it is recommended to expand cache to
maximum 48GB.
(i) Cache Saturation (ii) Cache Expansion
Usage
Cache
♪
Not
Saturated
・・・
・・・
♪
Usage
Cache
Cache
(Saturated by Usage)
・・・
…
The following table describes recommended cache capacity.
c) Cache Capacity Selection
Logical disk capacity (GB) Recommended cache capacity Number of Cache Memory
*1
Up to 26TB
24GB Standard Cache Memory (12GB) x 2
More than 26TB
48GB Standard Cache Memory (24GB) x 2