After the cache rewarming process starts, some events can abort the entire process and some events can abort the process on specific aggregates. Cache rewarming errors and important events are reported entirely
through EMS messages.
Events that abort the cache rewarming process
- You add, remove, or move a Flash Cache or Flash Cache 2 module after the WAFL external cache creates the Snapshot copy, but before it rebuilds the cache.
- The takeover node crashes.
- The local node crashes as the WAFL external cache rebuilds the cache.
- After a node reboots, it shuts down before the WAFL external cache can rebuild the cache.
- You initiate a SnapRestore operation on the node's root aggregate before the WAFL external cache rebuilds the cache.
wafliron process mounts the root aggregate.
Events that abort cache rewarming on the affected aggregate
- You initiate a SnapRestore operation on an aggregate before the WAFL external cache rebuilds the cache.
- An aggregate does not come online within 20 minutes after the WAFL external cache starts to rebuild the cache.
wafliron process mounts the aggregate.
that indicate cache rewarming failures
Specific EMS messages indicate exactly what occurred during the cache rewarming process, but the following are some examples of EMS messages that you might see:
These EMS messages are informational to explain why the rewarm process did not complete, or to help technical support interpret and explain the events. Usually you do not have to do anything about them, but, in the event there is a corrective action, you can find it in the EMS log.