Re: [Gluster-users] master volume
On Thu, 15 Aug 2019 09:12:43 +0530 Shwetha Acharya wrote: > Consider that you have a volume, named vol1. Now you want to have a > replica of it, for disaster recovery. What do you do? You will create > a new volume, say, repica-vol1 in a different cluster. > > To replicate data from vol1 to replica-vol1, you will set up a geo-rep > session between vol1 and replica-vol1. In geo-replication, we call > your primary volume vol1 as master. The replicated volume > replica-vol1 is called slave. We call it master and slave because you > will see unidirectional sync of data from master volume(vol1) to > slave volume(replica-vol1). > > Hope this helps. Yep, thnx, that's much clearer now. R. -- richard lucassen http://contact.xaq.nl/ ___ Gluster-users mailing list Gluster-users@gluster.org https://lists.gluster.org/mailman/listinfo/gluster-users
Re: [Gluster-users] master volume
Consider that you have a volume, named vol1. Now you want to have a replica of it, for disaster recovery. What do you do? You will create a new volume, say, repica-vol1 in a different cluster. To replicate data from vol1 to replica-vol1, you will set up a geo-rep session between vol1 and replica-vol1. In geo-replication, we call your primary volume vol1 as master. The replicated volume replica-vol1 is called slave. We call it master and slave because you will see unidirectional sync of data from master volume(vol1) to slave volume(replica-vol1). Hope this helps. On Thu, 15 Aug 2019, 3:35 am richard lucassen, wrote: > On Wed, 14 Aug 2019 20:24:53 +0530 > Aravinda Vishwanathapura Krishna Murthy wrote: > > > > > If Master and Slave Volumes are in > > > > the same cluster then it is not so helpful when disaster happens. > > > > > > So, do I need to do something like this?: > > > > > > cluster volume name: gvol0 > > > replication vol name: rep-gvol0 > > > > Volume names can be kept as your convenience. > > The doc is quite unclear for me as a gluster newbie. It's the old Linux > paradox: the moment that you will understand the docs is the moment > that you don't need them anymore. > > Why is there a MASTER_VOL and a SLAVE_VOL? If I have a volume called > "gvol0" it seems logical to me that the geo-replication slave server > also uses this volume name "gvol0". The geo-replication server knows it > is not part of the active cluster because it was told to do so. > > OTOH, I think there must be an obvious reason for this MASTER_VOL and > SLAVE_VOL, but I don't understand this from the docs. > > R. > > -- > richard lucassen > http://contact.xaq.nl/ > ___ > Gluster-users mailing list > Gluster-users@gluster.org > https://lists.gluster.org/mailman/listinfo/gluster-users > ___ Gluster-users mailing list Gluster-users@gluster.org https://lists.gluster.org/mailman/listinfo/gluster-users
Re: [Gluster-users] master volume
On Wed, 14 Aug 2019 20:24:53 +0530 Aravinda Vishwanathapura Krishna Murthy wrote: > > > If Master and Slave Volumes are in > > > the same cluster then it is not so helpful when disaster happens. > > > > So, do I need to do something like this?: > > > > cluster volume name: gvol0 > > replication vol name: rep-gvol0 > > Volume names can be kept as your convenience. The doc is quite unclear for me as a gluster newbie. It's the old Linux paradox: the moment that you will understand the docs is the moment that you don't need them anymore. Why is there a MASTER_VOL and a SLAVE_VOL? If I have a volume called "gvol0" it seems logical to me that the geo-replication slave server also uses this volume name "gvol0". The geo-replication server knows it is not part of the active cluster because it was told to do so. OTOH, I think there must be an obvious reason for this MASTER_VOL and SLAVE_VOL, but I don't understand this from the docs. R. -- richard lucassen http://contact.xaq.nl/ ___ Gluster-users mailing list Gluster-users@gluster.org https://lists.gluster.org/mailman/listinfo/gluster-users
Re: [Gluster-users] master volume
On Wed, Aug 14, 2019 at 7:07 PM richard lucassen wrote: > On Wed, 14 Aug 2019 11:24:08 +0530 > Aravinda Vishwanathapura Krishna Murthy wrote: > > > Gluster Geo-replication is a feature to replicate data from one > > Gluster Volume to other. This needs to be set up for each Volume for > > which data needs to be replicated. > > That sounds logical :) > > > If Master and Slave Volumes are in > > the same cluster then it is not so helpful when disaster happens. > > So, do I need to do something like this?: > > cluster volume name: gvol0 > replication vol name: rep-gvol0 > Volume names can be kept as your convenience. > > R. > > -- > richard lucassen > http://contact.xaq.nl/ > ___ > Gluster-users mailing list > Gluster-users@gluster.org > https://lists.gluster.org/mailman/listinfo/gluster-users > -- regards Aravinda VK ___ Gluster-users mailing list Gluster-users@gluster.org https://lists.gluster.org/mailman/listinfo/gluster-users
Re: [Gluster-users] master volume
On Wed, 14 Aug 2019 11:24:08 +0530 Aravinda Vishwanathapura Krishna Murthy wrote: > Gluster Geo-replication is a feature to replicate data from one > Gluster Volume to other. This needs to be set up for each Volume for > which data needs to be replicated. That sounds logical :) > If Master and Slave Volumes are in > the same cluster then it is not so helpful when disaster happens. So, do I need to do something like this?: cluster volume name: gvol0 replication vol name: rep-gvol0 R. -- richard lucassen http://contact.xaq.nl/ ___ Gluster-users mailing list Gluster-users@gluster.org https://lists.gluster.org/mailman/listinfo/gluster-users
Re: [Gluster-users] master volume
Gluster Geo-replication is a feature to replicate data from one Gluster Volume to other. This needs to be set up for each Volume for which data needs to be replicated. If Master and Slave Volumes are in the same cluster then it is not so helpful when disaster happens. On Wed, Aug 14, 2019 at 1:02 AM richard lucassen wrote: > Hello list, > > I want to add a geo-replication server to a 2 node + arbiter > environment. Reading the docs, many questions pop up, under which this > one, they're talking about a "master volume" and a "slave volume": > > gluster volume geo-replication \ > :: create push-pem [force] > > > https://staged-gluster-docs.readthedocs.io/en/release3.7.0beta1/Administrator%20Guide/Distributed%20Geo%20Replication/ > > I have a few volumes running, but I fear I missed something crucial > somewhere. Or should I set up a geo-replication for each and every > volume I run on the two nodes? > > R. > > -- > richard lucassen > http://contact.xaq.nl/ > ___ > Gluster-users mailing list > Gluster-users@gluster.org > https://lists.gluster.org/mailman/listinfo/gluster-users > -- regards Aravinda VK ___ Gluster-users mailing list Gluster-users@gluster.org https://lists.gluster.org/mailman/listinfo/gluster-users
[Gluster-users] master volume
Hello list, I want to add a geo-replication server to a 2 node + arbiter environment. Reading the docs, many questions pop up, under which this one, they're talking about a "master volume" and a "slave volume": gluster volume geo-replication \ :: create push-pem [force] https://staged-gluster-docs.readthedocs.io/en/release3.7.0beta1/Administrator%20Guide/Distributed%20Geo%20Replication/ I have a few volumes running, but I fear I missed something crucial somewhere. Or should I set up a geo-replication for each and every volume I run on the two nodes? R. -- richard lucassen http://contact.xaq.nl/ ___ Gluster-users mailing list Gluster-users@gluster.org https://lists.gluster.org/mailman/listinfo/gluster-users
