William Robertson
Guest
|
 Posted:
Thu Nov 17, 2005 9:16 am Post subject:
Volume Snapshot runs extremely long... |
|
|
Hi there
I have just recently completed a rebuild of my server (HP NAS 2000s with
Windows Storage Server 2003 SP1), and a restore of the 1.2TB data from tape.
During the data restore I ran 4 intermittent manual Shadow Copies so as to
create "incremental" shadow copies in order to avoid having to run 1 HUGE
Shadow Copy at the end of the data restore.
My last Shadow Copy was run manually yesterday at ~08:30am, and when I
checked the System Volume Information directory (yip, I gave myself Read
permission on this directory...) I saw that the timestamp of this last
shadow copy only "stopped updating" at ~03:00am today, with a file size of
26Gb. This means that it ran for ~19hrs to create the 26Gb snapshot.
With all the large data changes now complete (the tape restore is finished),
the only changes to this data are now done by my users, so it can't be more
than ~5Gb/day?
I then started another manual Shadow Copy today, at 06:30am, 3.5 hrs after
the last 1 finished... The bummer is that this latest snapshot, with
supposedly very little data changes, is still running after 4hrs, and the
snapshot file is now 3.6Gb.
I have 2 questions please:
1. Should I worry that the snapshots appear to take extremely long to
"complete"? Will this improve over time when the Snapshots "catch up" with
the amount of data changes taking place?
2. Is there anyway in which I can try to calculate how much disk space will
be consumed by a snapshot, based on x% data changes per day?
Thanks
William R. |
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in