Performance impact using Volume Move

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Category:: ontap-9

Specialty:: perf

Last Updated:

Applies to

ONTAP 9
Volume move

Issue

Increased latency can be seen on Disk and/or Data Delay Center (D-blade) in qos statistics output due to volume moves
There may also be high cpu activity / utilization seen.
Note: Data latency during volume move is rare due to being a background process on CPU

Example: The following commands show high disk latency or Data latency while a volume move is running

nas1::> qos statistics volume latency show -volume data -vserver data_svm3

Workload            ID    Latency    Network    Cluster      Data       Disk        QoS

--------------- ------ ---------- ---------- ---------- ---------- ---------- ---------

-total-              -     0.00us     0.00us    0.00us   000.00us        0ms        0ms

data-wid307        307   300.00ms     0.00us       0ms   150.00ms   150.00ms        0ms

-total-              -     0.00us     0.00us    0.00us   000.00us        0ms        0ms

data-wid307        307   892.00ms     0.00us       0ms    92.00ms   800.00ms        0ms

-total-              -     0.00us     0.00us    0.00us   000.00us        0ms        0ms

data-wid307        307   125.00ms     0.00us       0ms    25.00ms   100.00ms        0ms

-total-              -     0.00us     0.00us    0.00us   000.00us        0ms        0ms

data-wid307        307   332.00ms     0.00us       0ms   300.00ms    32.00ms        0ms

nas1::> volume move show Vserver Volume State Move Phase Percent-Complete Time-To-Complete --------- ---------- -------- ---------- ---------------- ---------------- data_svm3 data alert replicating 98% Wed Sep 30 22:58:25 2022