Hi there,

On Thu, 20 Mar 2025, Dave Sherohman wrote:

This is primarily a cosmetic issue rather than a functional one, but I'd like 
to resolve it anyhow.

My BPC server has the backup pool stored on a zfs (raidz2) filesystem.  After a 
couple years of usage, the pool fs was over 90% full, so I copied the backups 
elsewhere, destroyed the original raidz2 vdev, and created a new pool with a 
couple more disks in it last week.  Functionally, all of this has worked 
flawlessly.

However, the pool usage graphs in the BPC web interface are convinced that pool 
disk usage has been a consistent 2.79T ever since I restarted with the expanded 
pool.  Actual usage is 50T, and continuing to increase daily as new backups are 
being taken.

The "before pooling and compression" value on the graph is steadily rising and appears to 
be plausible, and "Pool file system was recently at xx%" is reporting the correct 
percentage used (currently 60%).  It's only the graph of physical space used in the pool fs that is 
incorrect.

The graph displayed physical space usage correctly prior to my teardown and 
rebuild of the raidz2 pool, and the new pool is mounted at the same location as 
the old one.

Any suggestions for where I should look to get it graphing the correct amount 
of physical space used?

Look for $RRDFile in BackupPC/bin/BackupPC_rrdUpdate.

You might need to blow away[*] the RRD file and start again.

[*] Move to some safe location elsewhere. :)

--

73,
Ged.


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