----- Original Message ----- > From: "songxin" <songxin_1980@xxxxxxx> > To: "Anuradha Talur" <atalur@xxxxxxxxxx> > Cc: "gluster-user" <gluster-users@xxxxxxxxxxx> > Sent: Wednesday, March 2, 2016 4:09:01 PM > Subject: Re:Re: about tail command > > > > Thank you for your reply.I have two more questions as below > > > 1. the command "gluster v replace-brick " is async or sync? The replace is > complete when the command quit ? It is a sync command, replacing the brick finishes as the command returns. In one of the earlier mails I gave incomplete command for replace brick, sorry about that. The only replace-brick operation allowed from glusterfs 3.7.9 onwards is 'gluster v replace-brick <volname> <hostname:src_brick> <hostname:dst_brick> commit force'. > 2.I run "tail -n 0" on mount point.Does it trigger the heal? > > > Thanks, > Xin > > > > > > > > At 2016-03-02 15:22:35, "Anuradha Talur" <atalur@xxxxxxxxxx> wrote: > > > > > >----- Original Message ----- > >> From: "songxin" <songxin_1980@xxxxxxx> > >> To: "gluster-user" <gluster-users@xxxxxxxxxxx> > >> Sent: Tuesday, March 1, 2016 7:19:23 PM > >> Subject: about tail command > >> > >> Hi, > >> > >> recondition: > >> A node:128.224.95.140 > >> B node:128.224.162.255 > >> > >> brick on A node:/data/brick/gv0 > >> brick on B node:/data/brick/gv0 > >> > >> > >> reproduce steps: > >> 1.gluster peer probe 128.224.162.255 (on A node) > >> 2. gluster volume create gv0 replica 2 128.224.95.140:/data/brick/gv0 > >> 128.224.162.255:/data/brick/gv0 force (on A node) > >> 3.gluster volume start gv0 (on A node) > >> 4. mount -t glusterfs 128.224.95.140:/gv0 gluster (on A node) > >> 5.create some files (a,b,c) in dir gluster (on A node) > >> 6.shutdown the B node > >> 7.change the files (a,b,c) in dir gluster (on A node) > >> 8.reboot B node > >> 9.start glusterd on B node but glusterfsd is offline (on B node) > >> 10. gluster volume remove-brick gv0 replica 1 > >> 128.224.162.255:/data/brick/gv0 > >> force (on A node) > >> 11. gluster volume add-brick gv0 replica 2 128.224.162.255:/data/brick/gv0 > >> force (on A node) > >> > >> Now the files are not same between two brick > >> > >> 12." gluster volume heal gv0 info " show entry num is 0 (on A node) > >> > >> Now What I should do if I want to sync file(a,b,c) on two brick? > >> > >Currently, once you add a brick to a cluster, files won't sync > >automatically. > >Patch has been sent to handle this requirement. Auto-heal will be available > >soon. > > > >You could kill the newly added brick and perform the following operations > >from mount > >for the sync to start : > >1) create a directory <dirname> > >2) setfattr -n "user.dirname" -v "value" <dirname> > >3) delete the directory <dirname> > > > >Once these steps are done, start the killed brick. self-heal-daemon will > >heal the files. > > > >But, for the case you have mentioned, why are you removing brick and using > >add-brick again? > >Is it because you don't want to change the brick-path? > > > >You could use "replace-brick" command. > >gluster v replace-brick <volname> <hostname:old-brick-path> > ><hostname:new-brick-path> > >Note that source and destination should be different for this command to > >work. > > > >> I know the "heal full" can work , but I think the command take too long > >> time. > >> > >> So I run "tail -n 1 file" to all file on A node, but some files are sync > >> but > >> some files are not. > >> > >> My question is below: > >> 1.Why the tail can't sync all files? > >Did you run the tail command on mount point or from the backend (bricks)? > >If you run from bricks, sync won't happen. Was client-side healing on? > >To check if they were on or off, run `gluster v get volname all | grep > >self-heal`, cluster.metadata-self-heal, cluster.data-self-heal, > >cluster.entry-self-heal should be on. > > > >> 2.Can the command "tail -n 1 filename" trigger selfheal, just like "ls -l > >> filename"? > >> > >> Thanks, > >> Xin > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> _______________________________________________ > >> Gluster-users mailing list > >> Gluster-users@xxxxxxxxxxx > >> http://www.gluster.org/mailman/listinfo/gluster-users > > > >-- > >Thanks, > >Anuradha. > -- Thanks, Anuradha. _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-users
