5 quick setup, 1 performance profile – Accusys ExaRAID GUI User Manual
Page 60
Using the RAID GUI
2-20
2.5 Quick Setup
2.5.1 Performance profile
The RAID GUI provides three performance profiles for you to apply the
preset settings to the RAID configuration. This allows users to achieve the
optimal performance for a specified application. When using a profile for
the RAID configuration, any attempt to change the settings is rejected.
See the following table for the values of each profile. Select Off if you
want to configure the settings manually.
Profile
AV streaming
Maximum IO
per second
Maximum
throughput
Disk IO Retry
Count
0
(Degrade: 2)
1
1
Disk IO Timeout
(second)
3
(Degrade: 10)
30
30
Bad Block Retry
Off
On
On
Bad Block Alert
On
N/A
N/A
Disk Cache
On
On
On
Write Cache
On
On
On
Write Cache
Periodic Flush
(second)
5
5
5
Write Cache
Flush Ratio (%)
45
45
45
Read Ahead
Policy
Adaptive
Off
Adaptive
Read Ahead
Multiplier
8
-
16
Read Logs
32
-
32
Table 2-9 Performance profile values
Note
When the disks are in the degraded mode with the AV streaming
profile selected, the disk IO retry count and timeout values may be
changed to reduce unnecessary waiting for I/O completion.