Hi Dan. I believe that you would have to run this command:
gluster volume rebalance <volname> start at which point, Gluster will try to balance the files amongst the storage nodes. Whether or not it will accommodate non-uniform bricks I don't know for sure (since mine are uniform), but I believe that it will look at actual space available and try to make intelligent decisions on where to place files. Please check with the devs before implementing my suggestion, however - don't want to cause any harm since I'm unsure. James Burnash, Unix Engineering From: [email protected] [mailto:[email protected]] On Behalf Of Dan Bretherton Sent: Sunday, May 01, 2011 9:01 AM To: gluster-users Subject: [SPAM?] [Gluster-users] Non-uniform backend brick sizes Importance: Low Hello All- After posting to a previous thread about this issue (http://gluster.org/pipermail/gluster-users/2011-April/007157.html) I decided to start a new thread, mainly because I think I have found a problem relating to this setup. Our servers vary in size quite a lot, so some of the bricks in one particular volume are 100% full. This has not caused us any problems until now, because new files are always created on larger bricks where there is still space. However, yesterday a user complained that he was getting "device full" errors even though df reported several hundred GB free in the volume. The problem turned out to be caused by over-writing pre-existing files that were stored on one or more full bricks. Deleting the old files before creating them again cured the problem, because the new files were then created on larger bricks. Is this a known problem when using distributed or distributed/replicated volumes with non uniform backend sizes, and is there any way to avoid it? Lifting some comments and questions from the other thread... >From this posting: >http://gluster.org/pipermail/gluster-users/2011-March/007103.html > I see that > your backend sizes are different... Its preferred to keep them uniform. And from this posting: http://gluster.org/pipermail/gluster-users/2011-March/007104.html > try to keep the backend uniform to avoid any possible issues which may > arise later. Please could someone comment on the "possible issues that might arise" with with a setup involving non-uniform backend brick sizes. All comments and suggestions would be much appreciated. -Dan. DISCLAIMER: This e-mail, and any attachments thereto, is intended only for use by the addressee(s)named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail and any attachments thereto, is strictly prohibited. If you have received this in error, please immediately notify me and permanently delete the original and any printout thereof. E-mail transmission cannot be guaranteed to be secure or error-free. The sender therefore does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. NOTICE REGARDING PRIVACY AND CONFIDENTIALITY Knight Capital Group may, at its discretion, monitor and review the content of all e-mail communications. http://www.knight.com<http://www.knight.com/>
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