Administrator’s Command Line Guide

Chapter 4. Monitoring Acronis Storage Clusters
data chunk. So once the disk space on the smallest chunk server (200 GB) runs out, no more chunks in the
cluster can be created until a new chunk server is added or the replication factor is decreased.
If you now change the replication factor to 2, the vstorage top command will report the available disk space as
700 GB:
# vstorage set-attr -R /vstorage/stor1 replicas=2:1
# vstorage -c stor1 top
connected to MDS#1
Cluster ’stor1’: healthy
Space: [OK] allocatable 680GB of 700GB, free 1.6TB of 1.7TB
...
The available disk space has increased because now only 2 replicas are created for each data chunk and new
chunks can be made even if the smallest chunk server runs out of space (in this case, replicas will be stored
on a bigger chunk server).
Note: Allocatable disk space may also be limited by license.
4.3.1.2 Viewing Space Occupied by Data Chunks
To view the total amount of disk space occupied by all user data in the cluster, run the vstorage top command
and press the V key on your keyboard. Once you do this, your command output should look like the following:
# vstorage -c stor1 top
Cluster ’stor1’: healthy
Space: [OK] allocatable 180GB of 200GB, free 1.6TB of 1.7TB
MDS nodes: 1 of 1, epoch uptime: 2d 4h
CS nodes: 3 of 3 (3 avail, 0 inactive, 0 offline)
Replication: 2 norm, 1 limit, 4 max
Chunks: [OK] 38 (100%) healthy, 0 (0%) degraded, 0 (0%) urgent,
 0 (0%) blocked, 0 (0%) offline, 0 (0%) replicating,
 0 (0%) overcommitted, 0 (0%) deleting, 0 (0%) void
FS: 1GB in 51 files, 51 inodes, 23 file maps, 38 chunks, 76 chunk replicas
...
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