Sorry, I meant to reply-all, to Strahil's most recent message. So I'm doing so now. In addition to my comments below, this StackOverflow thread summarizes what I have in mind: https://stackoverflow.com/questions/43756405/extend-glusterfs-on-top-of-lvm Sent with ProtonMail Secure Email. ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Friday, April 16, 2021 5:33 AM, David White <dmwhite823@protonmail.com> wrote:
I don't think I would have the capability to take on the expense of adding two more servers to my environment, on top of the 4th server I already have, right now.
I realize the following isn't recommended, but would it be possible to, instead, intentionally degrade the gluster cluster by shutting 1 of the hosts down (put it in maintenance mode), add storage, and bring it back online?
Perhaps that would be a better approach, rather than try to shift things around with a 4th server.
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‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Thursday, April 15, 2021 7:36 PM, Strahil Nikolov hunter86_bg@yahoo.com wrote:
Gluster allows converting from replicted to distributed-replicated (so called expansion) of the volume. Of course you need to add the same amount of bricks as the replica count (which should be either 'replica 3' or 'replica 3 arbiter 1'). The Gluster documentation on the topic is quite extensive , but it's worth mentioning that you need to 'rebalance' your cluster after the expansion or you risk filling the old bricks - while having free space on the new bricks. That is expected ,as each file/dir's name is hashed and each subvolume (new vs old bricks) will have it's own range of hashes. When you expand the volume, some of the files/dirs on the old bricks have hashes that match to the new "triplet". Also , if you do not rebalance - that will have some performance impact as gluster will search the new bricks (for the files' whose hash matches the new subvolume) before searching the old bricks. P.S: I think that the Engine's web interface fully supports that operation, although I'm used to the cli. Best Regards, Strahil Nikolov В четвъртък, 15 април 2021 г., 20:05:50 ч. Гринуич+3, David White via Users users@ovirt.org написа: Is it possible to expand an existing gluster volume? I have a hyperconverged environment, and have enough space right now, but I'm going to have to significantly over-provision my environment. The vast majority of our customers are using a small fraction of the amount of space that they are technically allocated, but we still need to make that space available to them. As a result, I'd like to plan ahead, and go ahead and have a plan to add storage later down the road. I'd like to plan to shut down each server in the cluster (individually, not at once), add storage, and then bring them back online. Once all 3 are back online with the additional storage, I'd like to expand the gluster volume to use the additional space. Is that possible? How? Sent with ProtonMail Secure Email. Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/A7C3X2PW4D42GA...