Hi Udo, For your first question, the answer right now is No and so you cannot change a volume type from distributed to distributed-replicate with gluster 3.1.2 online. You would have to delete the volume and create a new volume with type distribute replicate using: $ gluster volume create <VOLNAME> replica 2 <brick1> <brick2> <brick3> <brick4> (A volume must have 4 bricks to become a distributed-replicate volume) However if you have a replicate volume with count 2 already created, then you just need to add 2 more bricks and it will automatically become a distributed replicate volume. This can be scaled to 6 bricks by adding 2 more bricks again and these steps can be done when the volume is online itself. For the last question, "remove-brick" command does not migrate data, the data in that brick cannot be accessed from the client unlike "replace-brick" which actually migrates data from one brick to the another. ----- Original Message ----- From: "Udo Waechter" <udo.waechter at uni-osnabrueck.de> To: gluster-users at gluster.org Sent: Tuesday, February 15, 2011 11:23:39 PM Subject: Reconfiguring volume type Hi all. I have been looking around the web but did not find a satisfying answer. Is it possible to change a volume type from distributed to distributed+replica with gluster 3.1.2? An online way at least? The manpage suggests that I can do: $ gluster volume add-brick <VOLNAME> [(replica <COUNT>)|(stripe <COUNT>)] <NEW-BRICK> ... I tried to add additional bricks to an existing distribute-type volume by: gluster volume add-brick testvol replica 2 <newbrick> This failed. I have 3 bricks in a distribute volume and would like to add additional 3 bricks to have it distribute+replicate. I can do it offline by (something like): - stop the volume - delete it - recreate it with addtional replicate bricks. I guess i need to take care that the data from the bricks is somehow synched to just one or so... Last small question: If I "gluster remove-brick" one brick, does its data get migrated to the other bricks? This is the case with "replace-brick". Thanks for your time and thoughts, udo. -- :: udo waechter - root at zoide.net :: N 52?16'30.5" E 8?3'10.1" :: genuine input for your ears: http://auriculabovinari.de :: your eyes: http://ezag.zoide.net :: your brain: http://zoide.net _______________________________________________ Gluster-users mailing list Gluster-users at gluster.org http://gluster.org/cgi-bin/mailman/listinfo/gluster-users -- regards, Rahul
