Host-based backup of VMware vSphere VMs.
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barrett27
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Calculating digest is taking a long time during VMware replication

Post by barrett27 »

Hello,
after extending the disk size of a VM, the VMware replication job of the machine gave a warning that if I understood well is related to an expected behaviour:
"3/18/2023 4:15:54 AM :: VM disk size changed since last sync, deleting all restore points"

However, the problem is with the "calculating digests" step that is taking a very long time (2,6TB the size of the disk and 75% calculatedi in 55 hours): is this a sort of full resync?

What "calculating digests" step does? How can I understand what is the root cause of the slowness of the process?

Many thanks,

db
MarkBoothmaa
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Full Name: Mark Boothman
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Re: Calculating digest is taking a long time during VMware replication

Post by MarkBoothmaa »

Because the disk size has changed the replica is no longer valid so it will delete all the restore points.
It then has to compare the replica against the source VM. This is the calculating digests portion and this refreshes the metadata / CBT information.
barrett27
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Re: Calculating digest is taking a long time during VMware replication

Post by barrett27 »

Thank you for the explanation Mark

db
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