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| -rw-r--r-- | doc/release-notes/3.10.0.md | 25 |
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diff --git a/doc/release-notes/3.10.0.md b/doc/release-notes/3.10.0.md index 2facc0cf3bf..03e65dcfb7f 100644 --- a/doc/release-notes/3.10.0.md +++ b/doc/release-notes/3.10.0.md @@ -54,10 +54,35 @@ the `gluster volume get` command on the newly introduced global option, ### Support for rebalance time to completion estimation *Notes for users:* +Users can now see approximately how much time the rebalance +operation will take to complete across all nodes. + +The estimated time left for rebalance to complete is displayed +as part of the rebalance status. Use the command: + +```bash +# gluster volume rebalance VOLNAME status +``` *Limitations:* +The rebalance process calculates the time left based on the rate +at while files are processed on the node and the total number of files +on the brick which is determined using statfs. The limitations of this +are: + + * A single fs partitiion must host only one brick. Multiple bricks on +the same fs partition will cause the statfs results to be invalid. + + * The estimates are dynamic and are recalculated every time the rebalance status +command is invoked.The estimates become more accurate over time so short running +rebalance operations may not benefit. + *Known Issues:* +As glusterfs does not stored the number of files on the brick, we use statfs to +guess the number. The .glusterfs directory contents can significantly skew this +number and affect the calculated estimates. + ### Separation of tier as its own service *Notes for users:* |