Thank you Rjesh for your help. I have a thinly provisioned LVM now running and can create snapshots on a real device, surviving boot.
There are 2 other questions rising up now. 1. I have a LV with 20G, data is 7G. How is it possible, that I could make 3 snapshots, each 7G? /dev/mapper/gluster-thinv1 20G 7.0G 12G 38% /bricks/brick1 /dev/mapper/gluster-7cb4b2c8f8a64ceaba62bc4ca6cd76b2_0 20G 7.0G 12G 38% /run/gluster/snaps/7cb4b2c8f8a64ceaba62bc4ca6cd76b2/brick1 /dev/mapper/gluster-506cb09085b2428e9daca8ac0857c2c9_0 20G 7.0G 12G 38% /run/gluster/snaps/506cb09085b2428e9daca8ac0857c2c9/brick1 /dev/mapper/gluster-fbee900c1cc7407f9527f98206e6566d_0 20G 7.0G 12G 38% /run/gluster/snaps/fbee900c1cc7407f9527f98206e6566d/brick1 /dev/mapper/gluster-d0c254908dca451d8f566be77437c538_0 20G 7.0G 12G 38% /run/gluster/snaps/d0c254908dca451d8f566be77437c538/brick1 2. The name of the snapshot folder is the UUID, My plan is to do a "tar cf" on the snapshot and even incremental tars. Therefore I would need the name of the folder. How could I pass that name to my bash script in order to make a backup of the last snap? 3. A tar process will take hours on the million files I have. I understand this is a snapshot, is there a way to backup a "single" snapshot file instead? Thank you in advance for sheding some light on this topic 2015-09-02 7:59 GMT+02:00 Rajesh Joseph <[email protected]>: > > > ----- Original Message ----- > > From: "Merlin Morgenstern" <[email protected]> > > To: "gluster-users" <[email protected]> > > Sent: Tuesday, September 1, 2015 3:15:43 PM > > Subject: [Gluster-users] gluster volume snap shot - basic questions > > > > Hi everybody, > > > > I am looking into the snap shot tool, following this tutorial: > > http://blog.gluster.org/2014/10/gluster-volume-snapshot-howto/ > > > > While having successfully created the LVM, gluster volume and one > snapshot, > > there are some questions arrising where I was hoping to find some > guidence > > here: > > > > 1. From a working setup as in the example I rebooted and everything was > gone. > > How can I make this setup persistent, so the gluster share is up and > running > > after boot. > > > > What do you mean by "everything was gone"? Are you using loop back device > as disks? > If yes then this is expected. Loop back device mapping is gone after > machine restart. > You should test with real disk or lvm partition. > > > 2. I understand that the snaps are under /var/run/gluster/snaps/ and I > found > > them there. Is it save to simply copy them to another server for backup? > My > > goal is to create a backup each day and transfer the snaps to an > FTP-Server > > in order to be able to recover from a broken machine. > > > > Yes, snap of individual bricks are mounted at /var/run/gluster/snaps/. I > am assuming > that you mean copy of data hosted on the snap brick when you say copy the > snap. > Are you planning to use some backup software or to run rsync on each brick? > > > 3. Do I really need LVM to use this feature? Currently my setup works on > the > > native system. As I understand the tuturial I would need to move that to > a > > LV, right? > > > > Yes, you need LVM and to be precise thinly provisioned LVM for snapshot to > work. > > > Thank you in advance on any help! > > > > _______________________________________________ > > Gluster-users mailing list > > [email protected] > > http://www.gluster.org/mailman/listinfo/gluster-users >
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