Hi again,
I have more questions about geo-replication on oVirt-RHHI
Need to understand somethings about DR on oVirt-HI
1 - What does mean : Scheduling regular backups using geo-replication (point 3.3.4 RHHI 1.7 Doc Maintaining RHHI)
- Does this mean creating a check-point?
- If yes, does this mean that the geo-replication process will sync data up to that check-point and then stops the synchronization, then repeat the same cycle the day after? does this mean that the minimum RPO is one day?
2 - Why the use of this check-point? why not let the geo-replication work all the time?
3 - Geo-replication can be started/stoped after at any time, could this be a problem when executing a disaster-recovery?
4 - I am running a test environnement, and it's not up all the time, but I noticed this, if the geo-replication is running and the time of the schedule (the check-point hour) is reached, the replication is stopped. What does this mean?
1 - What does mean : Scheduling regular backups using geo-replication (point 3.3.4 RHHI 1.7 Doc Maintaining RHHI)
- Does this mean creating a check-point?
- If yes, does this mean that the geo-replication process will sync data up to that check-point and then stops the synchronization, then repeat the same cycle the day after? does this mean that the minimum RPO is one day?
2 - Why the use of this check-point? why not let the geo-replication work all the time?
3 - Geo-replication can be started/stoped after at any time, could this be a problem when executing a disaster-recovery?
4 - I am running a test environnement, and it's not up all the time, but I noticed this, if the geo-replication is running and the time of the schedule (the check-point hour) is reached, the replication is stopped. What does this mean?
5 - I created a snapshot of a VM on the source Manager, I synced the volume then I executed a DR, The VM was started on the Target Manager but the VM didn't have its snapshot, any idea???
Regards and be safe .
Le ven. 4 oct. 2019 à 06:32, Satheesaran Sundaramoorthi <sasundar@xxxxxxxxxx> a écrit :
Hello Wodel,Glad to hear for considering gluster geo-replication for oVirt-gluster HC infra.More answers inlineOn Wed, Oct 2, 2019 at 3:54 PM wodel youchi <wodel.youchi@xxxxxxxxx> wrote:Hi,oVirt Hyperconverged disaster recovery uses georeplication to replicate the volume containing the VMs.What I know about georeplication is that it is an asynchronous replication.My questions are :- How the replication of the VMs is done, are only the changes synchronized?Gluster geo-replication should be configured from the gluster volume that backs the storage domain at yoursite to other( at the remote site ). Gluste geo-rep uses 'rsync' under the hoods, so post the first sync,only the changes are synchronized- What is the interval of this replication? can this interval be configured taking into consideration the bandwidth of the replication link.You have to make use of oVirt Manager to schedule your remote sync.Click on gluster volume backed storage domain -> click on 'Remote data sync setup' -> create a schedule- How can the RPO be measured in the case of a georeplication?Its completely based on the schedule that you set.Geo-replication process by itself, sets the checkpoint at the master volume and it guaranteesthat contents will be synced till that checkpoint to the slave, when completed.Thanks,Satheesaran S ( sas )
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