This article applies to all JSDR software versions.
These alarms are sent by MSA when the below condition is hit.
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Explanation of Bitmap On Frequency and Back Pressure On Frequency
Bitmap On Frequency
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Backpressure
"Backpressure On Frequency" is measured as the percentage of operating time that data could not efficiently reach the DRVA, so newly written data was captured by the IO filters in bitmaps for later replication.Bitmap mode warning: This alarm will be triggered if a domain stays in bitmap mode for application write operations were slowed to accommodate data replication.
Backpressure Alarm
An alarm notification will be triggered if application write Backpressure has been applied for a period exceeding 5 consecutive
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mintes.
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Cause of
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Network disruption between DRVA and the object store.
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Backpressure
Backpressure occurs when the replication incoming data rate exceeds the outgoing data rate.
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Note: DRVA To monitor backpressure, the network statistics of protected VMs and DRVAs can be checked verified from the vCenter level to isolate any issues. |
Bitmap
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"Bitmap On Frequency
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The " is measured as the percentage of operating time the application writes operations were slowed to accommodate data replication.BackPressure alarm: This alarm will be triggered if the application write backPressure has been applied for data could not efficiently reach the DRVA causing newly written data to be captured by the IOFilters in bitmaps for replication at a later point in time.
Bitmap Alarm
An alarm notification will be triggered if a domain stays in bitmap mode for a period exceeding 5 consecutive minutes.
Cause of
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Bitmap Mode
Bitmap mode occurs when:
There is a network disruption between the DRVA and the object store.
When the replication log is full and cannot be written to.
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Note: The Network Statistics of a Protected VM and DRVA can be verified From the vCenter level to isolate the issueDRVA network statistics can be checked from the vCenter. |