Online defragmentation happens during the scheduled store maintenance
period, which applies to clustered servers, CCR and SCC, as well as
unclustered servers. Offline defragmentation is never necessary except in
unusual circumstances, and I'm not sure what the process is for CCR.
Without doing the research, I'm going to guess that you can run the offline
defragmentation on both nodes, or you can run it on the primary node and
then reseed the secondary node. In either case, you're talking about a
maintenance outage.
--
Ed Crowley MVP
"There are seldom good technological solutions to behavioral problems."
.
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