search for: replica

I've configured 6 bricks as distributed-replicated with replica 2, expecting that all active bricks would be usable so long as a quorum of at least 4 live bricks is maintained. However, I have just found http://docs.gluster.org/en/latest/Administrator%20Guide/Split%20brain%20and%20ways%20to%20deal%20with%20it/ Which states that "In a rep...

Hi Dave, On Mon, Feb 26, 2018 at 4:45 PM, Dave Sherohman <dave at sherohman.org> wrote: > I've configured 6 bricks as distributed-replicated with replica 2, > expecting that all active bricks would be usable so long as a quorum of > at least 4 live bricks is maintained. > The client quorum is configured per replica sub volume and not for the entire volume. Since you have a distributed-replicated volume with replica 2, the da...

...of storage set as /dev/sdb1, I would like to set these up in a raid 10 which will? give me 2TB useable. So Mirrored and concatenated? The command I am running is as per documents but I get a warning error, how do I get this to proceed please as the documents do not say. gluster volume create gv0 replica 2 glusterp1:/bricks/brick1/gv0 glusterp2:/bricks/brick1/gv0 glusterp3:/bricks/brick1/gv0 glusterp4:/bricks/brick1/gv0 Replica 2 volumes are prone to split-brain. Use Arbiter or Replica 3 to avoid this. See: http://docs.gluster.org/en/latest/Administrator%20Guide/Split%20brain%20and%20ways%20to%20de...

On Mon, Feb 26, 2018 at 05:45:27PM +0530, Karthik Subrahmanya wrote: > > "In a replica 2 volume... If we set the client-quorum option to > > auto, then the first brick must always be up, irrespective of the > > status of the second brick. If only the second brick is up, the > > subvolume becomes read-only." > > > By default client-quorum is "none&...

Hello all fellow GlusterFriends, I would like you to comment / correct my upgrade procedure steps on replica 2 volume of 3.7.x gluster. Than I would like to change replica 2 to replica 3 in order to correct quorum issue that Infrastructure currently has. Infrastructure setup: - all clients running on same nodes as servers (FUSE mounts) - under gluster there is ZFS pool running as raidz2 with SSD ZLOG/ZIL...

Just making sure this gets through. ---------- Forwarded message ---------- From: Martin Toth <snowmailer at gmail.com> Date: Thu, Sep 21, 2017 at 9:17 AM Subject: Upgrade Gluster 3.7 to 3.12 and add 3rd replica [howto/help] To: gluster-users at gluster.org Cc: Marek Toth <scorpion909 at gmail.com>, amye at redhat.com Hello all fellow GlusterFriends, I would like you to comment / correct my upgrade procedure steps on replica 2 volume of 3.7.x gluster. Than I would like to change replica 2 to repli...

Hello all fellow GlusterFriends, I would like you to comment / correct my upgrade procedure steps on replica 2 volume of 3.7.x gluster. Than I would like to change replica 2 to replica 3 in order to correct quorum issue that Infrastructure currently has. Infrastructure setup: - all clients running on same nodes as servers (FUSE mounts) - under gluster there is ZFS pool running as raidz2 with SSD ZLOG/ZIL...

I must ask again, just to be sure. Is what you are proposing definitely supported in v3.8? Kind regards, Mitja On 25/02/2018 13:55, Jim Kinney wrote: > gluster volume add-brick volname replica 3 arbiter 1 > brickhost:brickpath/to/new/arbitervol > > Yes. The replica 3 looks odd. Somewhere in 3.12 (?) or not until v4 a > change in command will happen so it won't count the arbiter as a replica. > > On February 25, 2018 5:05:04 AM EST, "Mitja Miheli?" >...

Hi! I am using GlusterFS on CentOS7 with glusterfs-3.8.15 RPM version. I currently have a replica 2 running and I would like to get rid of the split-brain problem before it occurs. This is one of the possible solutions. Is it possible to and an arbiter to this volume? I have read in a thread from 2016 that this feature is planned for version 3.8. Is the feature available? If so, could you gi...

gluster volume add-brick volname replica 3 arbiter 1 brickhost:brickpath/to/new/arbitervol Yes. The replica 3 looks odd. Somewhere in 3.12 (?) or not until v4 a change in command will happen so it won't count the arbiter as a replica. On February 25, 2018 5:05:04 AM EST, "Mitja Miheli?" <mitja.mihelic at arnes.si> wr...

Hi! I would like to ask you Samba gurus if it is possible to set up Samba PDC which uses OpenLDAP replica as backend. I had two separate OpenLDAP master servers (2.2.13-4) for two different Samba PDC servers (3.0.14a-2) with TLS support in different virtual networks (VLANs), and all worked fine. However, I decided that it would be nice (from an administrative point of view) to have all user/clien...

...PA only keeps the latest version of each major branch, so keep that in mind. With Ubuntu, every time you update, make sure to download and keep a manual copy of the .Deb files. Otherwise you will have to compile the packages yourself in the event you wanted to go back. Might need before adding 3rd replica: gluster peer probe node3 When you add the 3rd replica, it should start healing, and there may be an issue there if the VMs are running. Your plan to not have VMs up is good here. Are you using sharding? If you are not sharding, I/O in running VMs may be stopped for too long while a large image is...

...rum would be 3 of 4. The Q is I suppose why does the documentation give this command as an example without qualifying it? SO I am running the wrong command? I want a "raid10" On 27 April 2018 at 18:05, Karthik Subrahmanya <ksubrahm at redhat.com> wrote: > Hi, > > With replica 2 volumes one can easily end up in split-brains if there are > frequent disconnects and high IOs going on. > If you use replica 3 or arbiter volumes, it will guard you by using the > quorum mechanism giving you both consistency and availability. > But in replica 2 volumes, quorum does n...

Hi, With replica 2 volumes one can easily end up in split-brains if there are frequent disconnects and high IOs going on. If you use replica 3 or arbiter volumes, it will guard you by using the quorum mechanism giving you both consistency and availability. But in replica 2 volumes, quorum does not make sense since...

Hi, The existing syntax in the gluster CLI for creating arbiter volumes is `gluster volume create <volname> replica 3 arbiter 1 <list of bricks>` . It means (or at least intended to mean) that out of the 3 bricks, 1 brick is the arbiter. There has been some feedback while implementing arbiter support in glusterd2 for glusterfs-4.0 that we should change this to `replica 2 arbiter 1` , meaning that there...

...018, at 15:52, Mitja Miheli? <mitja.mihelic at arnes.si> wrote: > > I must ask again, just to be sure. Is what you are proposing definitely supported in v3.8? > > Kind regards, > Mitja > > On 25/02/2018 13:55, Jim Kinney wrote: >> gluster volume add-brick volname replica 3 arbiter 1 brickhost:brickpath/to/new/arbitervol >> >> Yes. The replica 3 looks odd. Somewhere in 3.12 (?) or not until v4 a change in command will happen so it won't count the arbiter as a replica. >> >> On February 25, 2018 5:05:04 AM EST, "Mitja Miheli?"...

Hi all, i had a replica 2 gluster 3.12 between S1 and S2 (1 brick per node) geo-replicated to S5 where both S1 and S2 were visible in the geo-replication status and S2 "active" while S1 "passive". I had to replace S1 with S3, so I did an "add-brick replica 3 S3" and then "remove-brick...

Hello all fellow GlusterFriends, I would like you to comment / correct my upgrade procedure steps on replica 2 volume of 3.7.x gluster. Than I would like to change replica 2 to replica 3 in order to correct quorum issue that Infrastructure currently has. Infrastructure setup: - all clients running on same nodes as servers (FUSE mounts) - under gluster there is ZFS pool running as raidz2 with SSD ZLOG/ZIL...

On Mon, Feb 26, 2018 at 6:14 PM, Dave Sherohman <dave at sherohman.org> wrote: > On Mon, Feb 26, 2018 at 05:45:27PM +0530, Karthik Subrahmanya wrote: > > > "In a replica 2 volume... If we set the client-quorum option to > > > auto, then the first brick must always be up, irrespective of the > > > status of the second brick. If only the second brick is up, the > > > subvolume becomes read-only." > > > > > By default cli...

Hi, For small lab environment I want to use GlusterFS with only ONE node. After some time I would like to add the second node as the redundant node (replica). Is it possible in GlusterFS 3.1 without downtime? Cheers PK