James, The problem is that there are a bunch of extended attributes that are present on the files/directories that point to the volume name. If you were taking bricks and putting them on the new volume, but the volume ID was the same it would be much easier. You could scrub the extended attributes off of the files and then add it to the new volume it would probably work. Ideally, you would add the new bricks freshly to the new volume and then copy the data to the Gluster mount point so it puts everything where it should be. -Jacob -----Original Message----- From: gluster-users-bounces at gluster.org [mailto:gluster-users-bounces at gluster.org] On Behalf Of Burnash, James Sent: Monday, February 14, 2011 7:18 AM To: gluster-users at gluster.org Subject: Re: How to convert a Distribute volume to Distribute-Replicate when adding a new brick If anybody at all has any ideas about this they would be warmly welcomed. The key thing I'm trying to accomplish is have no service interruption on the volume already in use ... Thanks! James Burnash, Unix Engineering -----Original Message----- From: gluster-users-bounces at gluster.org [mailto:gluster-users-bounces at gluster.org] On Behalf Of Burnash, James Sent: Thursday, February 10, 2011 3:42 PM To: gluster-users at gluster.org Subject: How to convert a Distribute volume to Distribute-Replicate when adding a new brick Well, I've searched through the mailing list and have been unable to find an answer to the problem I'm currently facing. I am currently in the middle of migrating from my old 6 server storage pool running GlusterFS 3.0.4 to a new pool that will eventually consist of the same machines all running GlusterFS 3.1.1. My initial setup was all 6 servers setup as Distribute-Replicate, so that I had 3 pairs of mirrors. To effect the conversion and minimize downtime, I took down 1 of each of the mirrors and converted them (with different storage hardware) to run GlusterFS 3.1.1. This all worked fine, and production is currently running on the following setup: (1) Server running a read-write storage pool in Distribute mode configured like this: # gluster volume info Volume Name: pfs-rw1 Type: Distribute Status: Started Number of Bricks: 2 Transport-type: tcp Bricks: Brick1: jc1letgfs16-pfs1:/export/read-write/g01 Brick2: jc1letgfs16-pfs1:/export/read-write/g02 Options Reconfigured: performance.stat-prefetch: on performance.cache-size: 2GB Then I have: (2) Servers running the read-only pools in this configuration: gluster volume info Volume Name: pfs-ro1 Type: Distributed-Replicate Status: Started Number of Bricks: 10 x 2 = 20 Transport-type: tcp Bricks: Brick1: jc1letgfs17-pfs1:/export/read-only/g01 Brick2: jc1letgfs18-pfs1:/export/read-only/g01 Brick3: jc1letgfs17-pfs1:/export/read-only/g02 Brick4: jc1letgfs18-pfs1:/export/read-only/g02 Brick5: jc1letgfs17-pfs1:/export/read-only/g03 Brick6: jc1letgfs18-pfs1:/export/read-only/g03 Brick7: jc1letgfs17-pfs1:/export/read-only/g04 Brick8: jc1letgfs18-pfs1:/export/read-only/g04 Brick9: jc1letgfs17-pfs1:/export/read-only/g05 Brick10: jc1letgfs18-pfs1:/export/read-only/g05 Brick11: jc1letgfs17-pfs1:/export/read-only/g06 Brick12: jc1letgfs18-pfs1:/export/read-only/g06 Brick13: jc1letgfs17-pfs1:/export/read-only/g07 Brick14: jc1letgfs18-pfs1:/export/read-only/g07 Brick15: jc1letgfs17-pfs1:/export/read-only/g08 Brick16: jc1letgfs18-pfs1:/export/read-only/g08 Brick17: jc1letgfs17-pfs1:/export/read-only/g09 Brick18: jc1letgfs18-pfs1:/export/read-only/g09 Brick19: jc1letgfs17-pfs1:/export/read-only/g10 Brick20: jc1letgfs18-pfs1:/export/read-only/g10 Options Reconfigured: performance.cache-size: 2GB performance.stat-prefetch: on Now that all of production is off the old setup, I want to take one of those servers (suitably reconfigured with 3.1.1) and make it participate in the read-write pool, but change the Type to Distributed-Replicate. Is this possible? Thanks James Burnash, Unix Engineering 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 copy of any e-mail 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. 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