How to solve backup failed status not found in pmm after changing the storage location?

Percona Monitoring and Management (PMM) PMM 2.x
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Description:

[Detailed description of the issue or question]
How to solve backup failed status not found in pmm after changing the storage location?

backup failed
backup failed834×460 8.53 KB

I have already configured a nfs server that share a directory called mongo-nas-storage for the mongodb replica-set, all of the node member in replica set has already mount on the mongo-nas-storage. However, I was failed to create backup and received error as the attached image. Any one have idea?

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Hi @Alvin_Ma , It looks like backup process wasn’t even started. Can you please check your pmm-agent log for an errors?

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Thanks for reply, but how could I check the log? Given that I did not configure the path of pmm agent log and my servers OS is RHEL8.7, where is the default path of pmm agent log? Thanks!

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Hi all, thanks for replying, the log error showing as following, do you have any idea?
[ERROR: get backup files: create backu pCursor: (Location50917) Oplog rolled over while establishing the backup cursor.

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Oplog is a circular buffer. This means your oplog is not big enough to let the backup finish without rolling over. Consider increasing your oplog size to have a few days worth of oplog.