Hi,
Can anyone tell me how how long is too long to wait for a replication to be finished? We have a large server with various drives attached that took almost 2 weeks to replicate to our DR site. But it has been doing the sync for 2 days now. I have my RPO set for 12 hours, so I'm wondering if it is too large, and cannot sync in the time it has allocated. I did get an RPO violation, but it has since cleared. Thank you for any advice!
You can look in the VM's and VC's events to check how much time it took for the sync and the amount of data that was transferred. Thus you can do the math if 12 hours is enough or you need to change it.
Keep in mind that IO is changing in time then 12 hours could be enough at some point and insufficient in another.
Hope this helps.
Regards,
--Martin
Thank you for the reply Martin! However the initial sync is not yet complete. The status was at about 92% 2 days ago. But since then, it has been showing as "sync". I just don't know if it is hung up, and I should abort and retry; or if I should let it run its course. The event logs can't show the time of the sync, until it is complete.
Hi Chris,
If the initial sync was not completed the status of the replication must be Initial Full sync. Once it completes there are still some diffs between the original VM and its replica files. Hence the product need to perform some additional sync - thus the replication status is changed to sync. The amount of transferred bytes is published when the sync completes - yes. However you should check when previously the inital full sync has completed. I strongly believe you should have event published 2 days ago for this.
Are you using vSphere Replication with SRM?
I would suggest that you do an offline initial copy of the VM. Take a copy of the VM to a removal hard drive, ship the hard drive to the remote site and copy to the destination location. Then initiate the vSphere Replication using this copy as an initial seed.
To find out if you will be able to support your required RPO you need to work out the rate of change on the VM and the bandwidth available. If you have a dedicated 10Mb link between your sites then at optimal conditions you will be able to transfer about 4GB per hour. If your VM has 5GB of changed data per hour then you are not going to be able to replicate it every hour.
