On Thursday, June 16, 2005 12:30:27 PM +0200 Hans-Gunther Borrmann
<[EMAIL PROTECTED]> wrote:
On Wednesday 15 June 2005 16:48, Ken Hornstein wrote:
> RWrite: 536871953
> number of sites -> 2
> server leda partition /vicepa RW Site -- New release -- Old
> release server atlas.cg.cs.tu-bs.de partition /vicepb RO Site -- Old
> release -- Old release
I couldn't help noticing that you don't have a RO volume on the same
machine as the RW copy.
This once happened to us here on one volume (don't ask; someone here
INSISTED that it didn't cause any problems). I noticed "weird"
behavior during vos releases. I can't quantify "weird" anymore than
that; it was strange and it was a while ago, and I pestered people
until it had a RO on the same machine as the RW copy, and the weirdness
went away. I could easily believe that not having a RO copy on the
same machine as the RW copy would be a corner case that isn't tested
that much, and maybe it would be worth putting one there just to see if
it solves some of your problems.
What I noticed in this situation was , that "vos release" of a "large"
volume took an incredible long time. "large" in this case meant ~100000
Files. Having an ro on the same server reduced the time to a normal
value. --
Yes, that's going to be true. If you don't have an RO site in the same
place as the RW, then it needs to create a temporary release clone for each
release. Doing that takes as long as creating the local RO site for a full
release, which is basically linear in the total number of vnodes in the
volume. If there is a permanent local RO site, then it requires only an
incremental update, which is still linear in the number of vnodes, but with
a much smaller constant.
-- Jeff
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