Kadalu Storage Volume Rebalance#26
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LGTM
The plan and design looks neat 👍
| kadalu volume rebalance-stop <POOL>/<VOLUME> | ||
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| Above command calls the respective API that internally starts a service in respective Storage unit nodes. **Note**: These services will halt once the Rebalance process completes its job. Do not start the service in every nodes of the Volume, start only in the node of the first Storage unit from each distribute groups. |
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The design is cool 💯
Any reason for the command to be run from node of 1st storage unit from each distribute group. Is it avoid redundancy or wrong calculation of starting point of hash range.
Will it not be feasible to call the command from server node as an option, since moana has server-client model and create a node action to fetch necessary xattr details from nodes of 1st storage unit of dist grp to make it much simpler?
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First node is to make it predictable. Any random node is fine, but Moana should keep a reference where it started the service. We can improve this part later. For now it always starts in the first node of every distribute group.
| kubectl kadalu rebalance-status <Pool-name> | ||
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| == Tool to handle the rebalance |
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Does this also contain the migrate data option to remove linkfiles created for renamed files in cached locations or this is part of glusterfs rebalance command itself?
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Migrate data is handled by GlusterFS itself via the exposed virtual xattrs. Rebalance tool only manages the filesystem crawl and calls Rebalance xattrs.
Signed-off-by: Aravinda Vishwanathapura <mail@aravindavk.in>
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Signed-off-by: Aravinda Vishwanathapura mail@aravindavk.in