When to Add More Write Log Devices (BUI)
Use the following procedure to determine if you need more write log devices for the
appliance.
Before You Begin
Go to Maintenance > Hardware to identify which chassis and slots contain write cache
devices.
-
Create a worksheet as described in Creating a Worksheet (BUI).
-
Click the add icon
next to Add statistic.
-
Go to DISK > Disks > Broken down by percent utilization.
-
Select a write log device.
-
Click the drilldown icon
and select As a raw statistic.
-
Repeat steps 4 and 5 for all existing write log devices.
-
Wait at least 10 minutes.
Note -
Ten minutes is a general guideline. This amount of time may be adjusted if you have
a performance-sensitive, short-duration synchronous write workload.
-
Examine the graph(s).
You may want to add more write log devices when existing devices are 90%
utilized.