Discussion:
What happens to replicated folders if a WAN link is down for hours?
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£Jim
2009-12-15 17:00:23 UTC
Permalink
What happens to replicated folders if a WAN link is down for hours (or
even longer) then reconnected? Does replication catch up by making all
the changes from either end? Is there a maximum disconnection time?
Thanks
DaveMills
2009-12-15 22:46:32 UTC
Permalink
Post by £Jim
What happens to replicated folders if a WAN link is down for hours (or
even longer) then reconnected? Does replication catch up by making all
the changes from either end? Is there a maximum disconnection time?
Thanks
Well "hours" will simply delay the replication. It is designed to work with the
AD inter-site replication schedule which can be configured to only happen during
specified periods. I would not expect weeks to make much difference either but
as to a maximum I do not know.
--
Dave Mills
There are 10 types of people, those that understand binary and those that don't.
Falcon ITS
2009-12-31 03:35:01 UTC
Permalink
Hello,


Yes, replication will continue however, you have to be careful of a journal
wrap. When WAN breaks, changes continue to be registered in the USN journal.
When the WAN re-establishes, the journal will allow it to "catch up" on
changes made while the WAN link was broken.

The problem occurs if the WAN link is down for too long, the USN journal
gets filled and wraps around. You can increase the USN journal size in the
registry. If your WAN link goes down for long periods, I highly recommend you
increase the USN journal size.

http://support.microsoft.com/kb/292438
--
Miguel Fra / Falcon ITS
http://www.falconits.com
Post by £Jim
What happens to replicated folders if a WAN link is down for hours (or
even longer) then reconnected? Does replication catch up by making all
the changes from either end? Is there a maximum disconnection time?
Thanks
.
Marc K
2010-01-25 17:21:36 UTC
Permalink
Another fun complication of communication errors is if the "Staging Area"
overflows. DFS-R will happily remove files that have not replicated to make
room for new files.
Post by Falcon ITS
Hello,
Yes, replication will continue however, you have to be careful of a journal
wrap. When WAN breaks, changes continue to be registered in the USN journal.
When the WAN re-establishes, the journal will allow it to "catch up" on
changes made while the WAN link was broken.
The problem occurs if the WAN link is down for too long, the USN journal
gets filled and wraps around. You can increase the USN journal size in the
registry. If your WAN link goes down for long periods, I highly recommend you
increase the USN journal size.
http://support.microsoft.com/kb/292438
--
Miguel Fra / Falcon ITS
http://www.falconits.com
Post by £Jim
What happens to replicated folders if a WAN link is down for hours (or
even longer) then reconnected? Does replication catch up by making all
the changes from either end? Is there a maximum disconnection time?
Thanks
.
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