Administrator’s Command Line Guide

Chapter 4. Monitoring Storage Cluster
Parameter Description
CLID Client identifier (ID).
LEASES Average number of files opened for reading/writing by the client and not yet closed,
for the last 20 seconds.
READ Average rate, in bytes per second, at which the client reads data, for the last 20 seconds.
WRITE Average rate, in bytes per second, at which the client writes data, for the last 20 sec-
onds.
RD_OPS Average number of read operations per second the client made, for the last 20 seconds.
WR_OPS Average number of write operations per second the client made, for the last 20 sec-
onds.
FSYNCS Average number of sync operations per second the client made, for the last 20 seconds.
IOLAT Average/maximum time, in milliseconds, the client needed to complete a single IO op-
eration, for the last 20 seconds.
HOST Client hostname or IP address.
4.5 Monitoring Physical Disks
The S.M.A.R.T. status of physical disks is monitored by the smartctl tool installed along with Acronis Storage.
The tool is run every 10 minutes as a cron job also added during installation. The smartctl tool polls all
physical disks attached to nodes in the cluster, including caching and journaling SSDs, and reports the results
to the MDS server.
Note: For the tool to work, enable the S.M.A.R.T. functionality in node’s BIOS.
You can view disk poll results for the last 10 minutes in the output of the vstorage top command. For
example:
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