Re: [Gluster-users] How to raed / write in geo-replication slave
Hi Dave, I see, thank you. What I am planning to do: 1. Write on the master 2. Read from the slave (if the file is not on the slave, then search on the master). What do you think about? -- Kindest regards, Milos Cuculovic IT Manager -- MDPI AG Postfach, CH-4005 Basel, Switzerland Office: Klybeckstrasse 64, CH-4057 Basel, Switzerland Tel. +41 61 683 77 35 Fax +41 61 302 89 18 Email: cuculo...@mdpi.com Skype: milos.cuculovic.mdpi On 16.07.2015 00:23, Dave Warren wrote: On 2015-07-15 00:13, Milos Cuculovic - MDPI wrote: Thank you for your reply. You're right, the configuration you mentioned is the right one. The problem with the solution 1 is that I need bi-directional sync. The solution 2 is also not possible, I need to allow users to write on both places in the same time. I saw there is a possibility to do GlusterFS Distribute to Replica, I tried this out but the synchronization is done synchronous, so it takes time to do it and it is very slow. Any solution? I don't believe there is a way to do this within Gluster itself, geo-replication is only a one-way solution by design. If you can deal with asynchronous sync between the geo sites, you could use something like unison to synchronize two independent gluster volumes. This is obviously messy since it introduces separate software into the mix which could require it's own maintenance. ___ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users
Re: [Gluster-users] How to raed / write in geo-replication slave
On 2015-07-15 00:13, Milos Cuculovic - MDPI wrote: Thank you for your reply. You're right, the configuration you mentioned is the right one. The problem with the solution 1 is that I need bi-directional sync. The solution 2 is also not possible, I need to allow users to write on both places in the same time. I saw there is a possibility to do GlusterFS Distribute to Replica, I tried this out but the synchronization is done synchronous, so it takes time to do it and it is very slow. Any solution? I don't believe there is a way to do this within Gluster itself, geo-replication is only a one-way solution by design. If you can deal with asynchronous sync between the geo sites, you could use something like unison to synchronize two independent gluster volumes. This is obviously messy since it introduces separate software into the mix which could require it's own maintenance. -- Dave Warren http://www.hireahit.com/ http://ca.linkedin.com/in/davejwarren ___ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users
Re: [Gluster-users] How to raed / write in geo-replication slave
Hi Sweta, Thank you for your reply. You're right, the configuration you mentioned is the right one. The problem with the solution 1 is that I need bi-directional sync. The solution 2 is also not possible, I need to allow users to write on both places in the same time. I saw there is a possibility to do GlusterFS Distribute to Replica, I tried this out but the synchronization is done synchronous, so it takes time to do it and it is very slow. Any solution? -- Kindest regards, Milos Cuculovic IT Manager -- MDPI AG Postfach, CH-4005 Basel, Switzerland Office: Klybeckstrasse 64, CH-4057 Basel, Switzerland Tel. +41 61 683 77 35 Fax +41 61 302 89 18 Email: cuculo...@mdpi.com Skype: milos.cuculovic.mdpi On 15.07.2015 07:23, Sweta Anandpara wrote: Hi Milos, If I get this correctly, this is your configuration below: * Geo-rep master- Europe * Geo-rep slave - Asia * Same web application installed, and users from Asia are redirected to slave (in Asia), users from rest of the world are directed to master (in Europe) And you want read/write facility to be available in slave as well. YES, this is possible. BUT, it defeats the purpose of geo-replication. As per the concept of disaster recovery, read/writes should be carried out only at the master, and slave (if at all used), should be limited to only read workload. In your case, the very first write to the slave is going to render your geo-rep setup out-of-sync, and you would eventually have to delete off all the (new) content at the slave to get back the master and slave in sync. 1. If you are okay with this and would still like to go ahead with writes at both master and slave, all you would have to do is get the slave volume online. 2. Alternative: IF you are okay with writes happening at only one of the place at a time, then you could alternate between making Asia as master(and Europe as slave) and Asia as slave (and Europe as master), with the steps mentioned in this section of the Admin guide: http://documentation-devel.engineering.redhat.com/site/documentation/en-US/Red_Hat_Storage/3/html-single/Administration_Guide/index.html#Promoting_a_Slave_to_Master Would like to reiterate again - (2) is fine.. (1) is NOT recommended. Do reach out for any other queries. Thanks, Shweta On 07/14/2015 07:57 PM, Milos Cuculovic - MDPI wrote: Hi All, I have two GlusterFS servers, one master and one slave. They are doing geo-replication. I need to read and write on both of them. Here are some details: 2 data centers (One in Europe and one in Asia) The same web application is installed on both data centers Users from Asia are redirected to the Asian DC Users from the rest of the World and redirected in Europe The application is r/w some files from the glusterFs storage server The master is in Europe, and the r/w is fast I need people from the Asian DC to also r/w directly in Asia Is this possible, if so, any help please? I appriciate your help. Milos ___ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users ___ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users ___ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users
Re: [Gluster-users] How to raed / write in geo-replication slave
Hi Milos, If I get this correctly, this is your configuration below: * Geo-rep master- Europe * Geo-rep slave - Asia * Same web application installed, and users from Asia are redirected to slave (in Asia), users from rest of the world are directed to master (in Europe) And you want read/write facility to be available in slave as well. YES, this is possible. BUT, it defeats the purpose of geo-replication. As per the concept of disaster recovery, read/writes should be carried out only at the master, and slave (if at all used), should be limited to only read workload. In your case, the very first write to the slave is going to render your geo-rep setup out-of-sync, and you would eventually have to delete off all the (new) content at the slave to get back the master and slave in sync. 1. If you are okay with this and would still like to go ahead with writes at both master and slave, all you would have to do is get the slave volume online. 2. Alternative: IF you are okay with writes happening at only one of the place at a time, then you could alternate between making Asia as master(and Europe as slave) and Asia as slave (and Europe as master), with the steps mentioned in this section of the Admin guide: http://documentation-devel.engineering.redhat.com/site/documentation/en-US/Red_Hat_Storage/3/html-single/Administration_Guide/index.html#Promoting_a_Slave_to_Master Would like to reiterate again - (2) is fine.. (1) is NOT recommended. Do reach out for any other queries. Thanks, Shweta On 07/14/2015 07:57 PM, Milos Cuculovic - MDPI wrote: > Hi All, > > I have two GlusterFS servers, one master and one slave. > They are doing geo-replication. > > I need to read and write on both of them. > > Here are some details: > > 2 data centers (One in Europe and one in Asia) > The same web application is installed on both data centers > Users from Asia are redirected to the Asian DC > Users from the rest of the World and redirected in Europe > The application is r/w some files from the glusterFs storage server > The master is in Europe, and the r/w is fast > I need people from the Asian DC to also r/w directly in Asia > > Is this possible, if so, any help please? > > I appriciate your help. > > Milos > ___ > Gluster-users mailing list > Gluster-users@gluster.org > http://www.gluster.org/mailman/listinfo/gluster-users ___ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users ___ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users
Re: [Gluster-users] How to raed / write in geo-replication slave
Hi Milos, If I get this correctly, this is your configuration below: * Geo-rep master- Europe * Geo-rep slave - Asia * Same web application installed, and users from Asia are redirected to slave (in Asia), users from rest of the world are directed to master (in Europe) And you want read/write facility to be available in slave as well. YES, this is possible. BUT, it defeats the purpose of geo-replication. As per the concept of disaster recovery, read/writes should be carried out only at the master, and slave (if at all used), should be limited to only read workload. In your case, the very first write to the slave is going to render your geo-rep setup out-of-sync, and you would eventually have to delete off all the (new) content at the slave to get back the master and slave in sync. 1. If you are okay with this and would still like to go ahead with writes at both master and slave, all you would have to do is get the slave volume online. 2. Alternative: IF you are okay with writes happening at only one of the place at a time, then you could alternate between making Asia as master(and Europe as slave) and Asia as slave (and Europe as master), with the steps mentioned in this section of the Admin guide: http://documentation-devel.engineering.redhat.com/site/documentation/en-US/Red_Hat_Storage/3/html-single/Administration_Guide/index.html#Promoting_a_Slave_to_Master Would like to reiterate again - (2) is fine.. (1) is NOT recommended. Do reach out for any other queries. Thanks, Shweta On 07/14/2015 07:57 PM, Milos Cuculovic - MDPI wrote: Hi All, I have two GlusterFS servers, one master and one slave. They are doing geo-replication. I need to read and write on both of them. Here are some details: 2 data centers (One in Europe and one in Asia) The same web application is installed on both data centers Users from Asia are redirected to the Asian DC Users from the rest of the World and redirected in Europe The application is r/w some files from the glusterFs storage server The master is in Europe, and the r/w is fast I need people from the Asian DC to also r/w directly in Asia Is this possible, if so, any help please? I appriciate your help. Milos ___ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users ___ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users
[Gluster-users] How to raed / write in geo-replication slave
Hi All, I have two GlusterFS servers, one master and one slave. They are doing geo-replication. I need to read and write on both of them. Here are some details: 2 data centers (One in Europe and one in Asia) The same web application is installed on both data centers Users from Asia are redirected to the Asian DC Users from the rest of the World and redirected in Europe The application is r/w some files from the glusterFs storage server The master is in Europe, and the r/w is fast I need people from the Asian DC to also r/w directly in Asia Is this possible, if so, any help please? I appriciate your help. Milos ___ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users
