Hi team!
Here is a case about how can I adjust the frequency of sending the 0x5E (PERSISTENT_RESERVE_IN) command sent by windows WSFC nodes.
I hope it can be helpful when you learn about it :)
Symptom
How can I adjust the frequency of sending the 0x5E (PERSISTENT_RESERVE_IN) command sent by Windows WSFC nodes?
Solution
Microsoft replied that this command is sent to disks by cluster nodes regularly to check reservation information and is sent to each LUN every three seconds by default.
You can set the frequency by configuring time interval of quorum disks.
Why does Cluster Node send 0x5E?
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As per the design of cluster, both the active node and passive nodes will try to check the disk reservation regularly.
The default setting is 3 seconds for each LUN on each cluster node.
So, the frequency should only depend
- The number of LUN on each node.
- The number of the cluster nodes.
By design, such setting won't cause big workload on your disk, so don't worry about it.
How to reduce the frequency?
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Refer to this document: http://msdn.microsoft.com/en-us/library/bb309226(v=vs.85).aspx
You can try to configure the Disk Arbitration Interval from 3 seconds to more. (Like 10 seconds). However, it's not recommended.
