NetApp AltaVault AVA400, Administration Manual

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NetApp AltaVault Cloud Integrated Storage Administration Guide 133
Beta Draft
Viewing the alarm status report Viewing reports and logs
Viewing the alarm status report
The Alarm Status report takes a current snapshot of the system to provide a single report you can use to check for any
issues with the AltaVault. The report examines the status of key system components. Use this report to gather
preliminary system information before calling NetApp Support to troubleshoot an issue.
Alarm Description
Admission Control Indicates that AltaVault has entered the admission control state. Admission control
limits the number of connections made to the AltaVault, so that you do not over-
consume resources on your system.
Cloud Bucket Consistency Indicates that there is data in the cloud although the AltaVault datastore is empty.
Enable replication and recovery to ensure that the cloud storage is synchronized
with the datastore.
Cloud Bucket Disparity Indicates that the cloud bucket that the AltaVault is trying to connect to might be in
use by another AltaVault. This prevents corruption of the files in the cloud.
Cloud Bucket Over Capacity Indicates that the cloud bucket size is greater than the licensed amount of cloud
capacity that you are using. You must upgrade to a higher-capacity license.
Generates an AutoSupport message when AutoSupport is enabled.
CPU Utilization Indicates that the system has reached the CPU threshold for one or more of the
CPUs in the AltaVault. If the system has reached the CPU threshold, check and
adjust your settings as appropriate.
Data Integrity Error Indicates that there was an inconsistency in the data stored on disk.
Generates an AutoSupport message when AutoSupport is enabled.
Datastore Eviction Indicates that the system has detected an issue with datastore eviction.
The alarm triggers when the appliance has started evicting data from the local disk
cache when the age of the evicted data is relatively young. An AltaVault has disk
space much smaller than the total addressable space on the cloud, and if disk space
runs low, the appliance starts evicting data from disk that has not been used recently.
This keeps only fresh and frequently accessed data in cache.
The AltaVault keeps statistics about how old the evicting data is (this is the average
evicted age). Usually, only old data is evicted. This behavior is generally not a
problem and does not trigger an alarm. However, the appliance might be
experiencing such a huge workload that more and more recent data needs to be
evicted from the appliance to make space for incoming data. This causes the average
evicted age to decrease, and when it goes below a certain threshold, the average
evicted age alarm triggers. This alarm is an anomalous event because it signals that
the appliance is handling a much larger workload than expected.
The alarm is useful in detecting whether the appliance is undersized relative to the
your normal workload. If the alarm is constantly triggered, then you should consider
increasing the AltaVault’s cache size with either expansion shelves or a larger
virtual capacity.
Datastore Low Space Indicates that the local data store (disk cache on the AltaVault) is running out of
space and the eviction process on the AltaVault is unable to run at a sufficient pace
to create space on the disk cache.
This alarm might trigger when replication is too slow.
View the Eviction Optimization report to determine how much disk cache is
available.