perfSONAR User Q&A and Other Discussion

[Kathy Benninger <>]

I'm following the procedure on
  http://docs.perfsonar.net/multi_ma_backups.html

"Managing Measurement Archive Data"
"Backing up and Restoring Data"
"Creating the Snapshot"

I issued the command:
  nodetool snapshot esmond -t esmond_snapshot

but the stat_aggregations directory is not being populated:

[root@ps benninge]# ls -al 
/var/lib/cassandra/data/esmond/stat_aggregations/snapshots/esmond_snapshot
ls: cannot access 
/var/lib/cassandra/data/esmond/stat_aggregations/snapshots/esmond_snapshot: 
No such file or directory

[root@ps benninge]# ls -al 
/var/lib/cassandra/data/esmond/stat_aggregations/snapshots/
ls: cannot access 
/var/lib/cassandra/data/esmond/stat_aggregations/snapshots/: No such file or 
directory

[root@ps benninge]# ls -al /var/lib/cassandra/data/esmond/stat_aggregations/
total 8
drwxr-xr-x 2 cassandra cassandra 4096 Oct 15  2014 .
drwxr-xr-x 6 cassandra cassandra 4096 Oct 15  2014 ..

The other directories (base_rates, rate_aggregations, raw_data) are 
populated and have files timestamped appropriately for the snapshot so that 
much seems to be working.

What should I check for stat_aggregations?

Kathy

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Kathy Benninger
Pittsburgh Supercomputing Center