Performance Index
This section describes the performance index when configuring a NAS environment.
Although the ETERNUS DX has sufficient throughput, the performance degrades when the load is high.
Performance requirements (indices for process performance) must be taken into consideration.
The following table provides the performance requirements for the ETERNUS DX.
Table 74
Performance Requirements (during Random Access) for the ETERNUS DX
Item
For a system focusing on online response
For a system focusing on batch throughput
CM (CPU) busy ratio
80% or less
90% or less
Disk busy ratio
60% or less
80% or less
Response time
20ms or less
(No standard value)
The performance requirements in
are based on the items below that are measured with ETERNUS SF
Storage Cruiser when the SAN function is used.
•
CM (CPU) busy ratio
CM load (CPU usage) ratio
•
Disk busy ratio
Disk usage busy ratio
•
Response time
Read and Write response times for each LUN and RAID groups (ms)
4. NAS Functions
Performance Index
197
Design Guide
Содержание ETERNUS DX S5 Series
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