Thanks for your reply Adamf, here are the answers:
CB server on both and 1 sync GW in one of them.
We backed up the source bucket,
stopped the SGW process,
flushed the SGW bucket
restored the source bucket
and then re-started the SGW process.
It took 2 hours to see the same amount of documents on both buckets (a little less than 900,000 items). But the problem came when the mobile devices started to connect to the SGW, we saw the CPU and network-in/out so busy.
We don’t keep any visible log that can tell when the push replication complete (should we?). But we realized the sync delay due to the fact that we were expecting some documents that were created at around 10 am in on of the mobile device and didn’t appear in the server until around 8-10 pm.
The mobile devices where synchronized with the server before the backup, so I don’t think there were many documents being pushed. Our app cleans the DB and leaves only 1 week old or later documents. Channels avoid mobile devices to download older documents. Total mobile DB may be around 2,000 - 4,000 documents, on each device, but as I said, they were synchronized before the backup.
I appreciate your help,
Sandra