I'm looking forward to viewing your links - thanks so much.
Re: WANSync, it does transfer the deltas. My last company used it for
File, Exchange and SQL 2000 replication. It is pretty cool, especially
if you get the HA (Hi Availability) version that lets you switch to DR
in seconds. I brought it into my last company and on one of my last
days we had problem with our Exchange cluster. We literally flipped a
switch and all users had to do was exit Outlook and re-open it They
even give users a message stating something like, "Your adminsitrator
has made changes, please close and relaunch Outlook'. It was a good
way to go out. You can set it to automatically failover, but it isn't
advised incase you are doing some routine maintenance, you don't want
to start changing DNS records and start operating out of a remote site.
Once you are ready to fail back to production, you simply tell it to
fail back and it copies all the changes back to Production. They also
give you the ability to pause replication and some other neat bells and
Since I've been here at my new company I haven't had a chance to get my
hands on the DR setup, but that's coming soon enough :-)
The cool thing about DFS is that it is free. I'm sure that if the R2
release had been out when we setup DR at my last company, we would've
gone the free route and lost out on some of the features because they
are very frugal there.
Post by Ned Pyle [MSFT]
That WANSync product looks neato. One thing I cannot seem to drag out of
their website though is if it does differential (delta) replication - I.e.
does it replicate only changes in file blocks, or does it replicate the
entire file when it's changed? That's the big thing that DFSR brings to the
table: I make a 1 row change in a 50MB spreadsheet and I only have to
replicate those blocks, not the whole file. Big savings in bandwidth and
time. On the other hand, they can do lots of things I know we can't do with
DFSR. Which leads me to...
The nice thing here is, you own both products - I'd recommend you set up
some test beds and compare them both to see which one you want to go forward
with. That way you get to make the recommendation. :-)
1. Is there a step by step tutorial (not necessarilly multimedia) on how to
2. Are they real time as long as the bandwidth permits it or do you set an
interval for the servers to poll each other for changes?
Technically with DFSR, you can set both bandwidth throttles and scheduled
If I understand your question the answer is: when the schedule is open,
replication occurs as files are changed, created, or deleted. When the
schedule closes, replication stops, regardless of whether all changed or new
files have replicated.
3. Would I need to make each NY and London server a DFS Namespace?
Nope. You did for FRS, but not for DFSR. Technically don't even need to
share the folders being replicated...
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