Re: Offline defrag
- From: "John Smith" <flava_kid@xxxxxxxxxxx>
- Date: Mon, 11 Sep 2006 12:13:34 +0100
we have roughly about 500 users, the last backup took 58hrs to complete and
it didn't backup all the storage groups. we are performing a brick level
backup. To give some idea on how our backup works, we backup to disk over
night, and in the morning this is staged off to tape. however we have not
had a successful backup for couple days because the throughput is sooo slow.
sometimes we see multiple backup schedule running because the last backup
didn't complete the allocated backup window.
just to make things clear, the total sum of our database are 680gig, our
biggest database 210gig with 150gig whitespace ( Ouch ). the rest of the
database are between 50-100gig and each database has roughly 12gig of
whitespace. Going through the event log and filtering for event id 1221 and
adding up all the whitespaces, we can roughly save 230gig of space and
reduce the databases of 380gig total.
I can handle the whitespace issue if the backup performance is quicker, but
at the moment backup is slower than snail with arthritis.
can I also ask if file system defrag would improve anything, if so, would
this require the stores to be dismounted.
"Kirill Palagin" <kpalagin@xxxxxxxxxxxxxxxxx> wrote in message
news:ODv0vFZ1GHA.1288@xxxxxxxxxxxxxxxxxxxxxxx
Having 10GB of whitespace in databases this big should is expected and
should not be cause for offline defrag.
How many users you have and how long backup takes? Hopefully, you are not
doing brick-level backup.
John Smith wrote:
Hi all,
I am new to exchange, we have recently migrated from lotus notes, where
users had unquoted mail files. When we have moved to exchange 2003, we
have decided to introduce quota with the mail system. so we've created
couple mail stores - 8 in total - and moved users about.
since we've moved users about, out database grew from 370gig to 680gig.
I have checked the event log and there is a lot 1221 event id, it seems
that each mail store has approximately 10gig of free space.
the other thing, our backup has also taking hit, it is extremely slow, it
takes forever to backup. the exchange through put for the backup has
takes a huge performance hit. I think the backup time interferes with
online defrag, I know the obvious thing to do is run the backup another
time, but because of the size of the databases being backed it is
continuously backing 24/7.
I have heard about eseutil, but alot of people are advising against it, I
don't have a recent backup either, I want to fix all this issues before
it becomes a nightmare.
please advice.
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