Hi Toasters,
It has been a while since my last post to the list but I wanted to echo
my private reply from last week to the Toasters list for everyone's
benefit.
The SnapInfo directory can reside on its own (separate) LUN or on the
same LUN with the Exchange transaction logs. What SnapManager uses this
directory for is to store metadata corresponding to each backup set. In
addition to that, SnapManager copies the transaction logs to the
SnapInfo directory as part of its backup process. This …
[View More]way, you can, for
example, use an old backup and still restore up to the minute of
failure. What SnapManager does is restore the older database from
snapshot and then replay all of the logs that it has stored plus any
live logs that were generated after the backup. There would need to be a
contiguous set of logs available, of course.
With respect to your LUN and volume layout, I would encourage you to
work with your NetApp technical sales representative to have them run
your configuration through the "Exchange Sizer" that they have
available. All variables from your particular environment will be
collected and then fed into the sizer. This will ensure proper data
layout and performance of Exchange as well as the NetApp storage
appliance. The NetApp technical sales representatives have been trained
on collecting the correct Exchange specific and NetApp specific data to
put into the sizer. There are some sizing formulas and guidelines in the
Administrator's guide but the sizer takes more than disk space into
account when sizing a system.
Please pardon my delayed response to the list but there was a reason for
that. SnapManager 3.2 was posted to the NOW site today and in this
release there are some new features relative to this discussion on
sizing. These new features (a subset of all the new features in 3.2)
are:
* Fractional space reservation policies
* Copy-less transaction log archiving
* Option to not backup logs that have already been truncated by Exchange
Here is a link to the new version for those of you with NOW access:
http://now.netapp.com/NOW/download/software/snapmanager_e2k/3.2/
Regards,
Paul Benn
SnapManager Development Team
Network Appliance
> -----Original Message-----
> From: Willeke, Jochen [mailto:Jochen.Willeke@wincor-nixdorf.com]
> Sent: Wednesday, March 29, 2006 8:01 AM
> To: toasters(a)mathworks.com
> Subject: snapinfo -- exchange on netapp
>
> Hi everybody,
>
> we are setting up an exchange 2003 system on a filer. Right
> now i am about to size the system. I often read that i need
> to have a snapinfo-lun. But i do not understand where i need
> this lun for.
> Exchange does not need it, does it?
>
> What i want to configure are two aggregates. One containig
> qtrees with luns for the databasefiles and one aggregate with
> qtrees and luns for the logfiles. And if really needed i
> would put the snapinfo-lun into the logfile aggregate.
>
> Perhaps somebody has already set up an exchange server on
> netapp storage and can help me.
>
> Thanks a lot in advance
>
> Jochen
>
[View Less]
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[View Less]
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[View Less]
Have a situation I do not fully understand.
Have an NTFS volume - contains mostly home drives.
This volume is snapvaulted to a nearstore. The nearstore is backed up
via NDMP.
Had to change the ACL at the volume level (boss's orders). Granted an
existing group change access.
I knew this would increase the size of the backups due to changing ACLs
on the whole volume.
What I don't understand is that the size of the incremental backups have
not gone back to "normal" since I made the change.
…
[View More]Thoughts?
Grant Warkentin
System Administrator II
City of Calgary - Information Technology
Mail Drop == 8245
Ph: (403) 268-5629 Fax: (403) 268-2546
NOTICE -
This communication is intended ONLY for the use of the person or entity named above and may contain information that is confidential or legally privileged. If you are not the intended recipient named above or a person responsible for delivering messages or communications to the intended recipient, YOU ARE HEREBY NOTIFIED that any use, distribution, or copying of this communication or any of the information contained in it is strictly prohibited. If you have received this communication in error, please notify us immediately by telephone and then destroy or delete this communication, or return it to us by mail if requested by us. The City of Calgary thanks you for your attention and cooperation.
[View Less]
I would think that a good portion of your backup time is the ndmp scan
prior to the backup. Not sure anything will help with that.
I would think the best way to accomplish backup in the shortest time is
to do volume level snapmirrors, which don't care about files. But,
barring that-
Is your NDMP backup going to a FC tape library? Or SCSI-attached? Or
Three way?
Also, what onTAP are you running? Perhaps if you went with a large
aggregate you'd be better off in all cases.
Glenn (the …
[View More]other one)
-----Original Message-----
From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com]
On Behalf Of George Kahler
Sent: Tuesday, April 04, 2006 10:45 AM
To: toasters(a)mathworks.com
Subject: volume space & ndmp backups issues
I have a space and a backup (ndmp) issues with one of my volumes that
is dedicated for mail in 'maildir' format (one message per file).
I'm looking for suggestions from people on alleviating the space issue
and possibly suggestions on the ndmp backup of this volume. I'm
thinking that these two might be related.
filer#1:/vol/maildir (14 x 72 GB disks)
2 qtrees:
ugrad (undergrad students)
grad (grad students)
backup: (nightly incr. on an average backs up about)
11GB , 6million files, runs for 7 hrs
filer#2:/vol/maildir2 (14 x 72 GB disks)
1 qtree:
emp (employees)
backup: (nightly incr. on an average backs up about)
8GB , 5million files, runs for 1.5 hrs
All 3 qtrees have the same 2 level directory tree structure (as
suggested by NetApp) and a common hashing algorithm is used to create
'home directories' in these qtrees. The top directory contains
sub-directories from 0-to-f. Each of those directories contain
sub-directories ranging from 00-to-ff. So a persons home directory
would be something like: /vol/maildir/grad/2/75/dummy
I need more space for the filer#1:/vol/maildir volume.
Q1: should I just expand the volume onto more disks ?
having more spindles might speed up the backup ?
Q2: should I separate the 2 qtrees (u/grad) into their own volumes (14
x 72 GB each) to give each more space ?
having only one qtree to scan , ndmp might run that much faster ?
Thanks for any suggestions.
George
[View Less]
I have a space and a backup (ndmp) issues with one of my volumes that
is dedicated for mail in 'maildir' format (one message per file).
I'm looking for suggestions from people on alleviating the space issue
and possibly suggestions on the ndmp backup of this volume. I'm
thinking that these two might be related.
filer#1:/vol/maildir (14 x 72 GB disks)
2 qtrees:
ugrad (undergrad students)
grad (grad students)
backup: (nightly incr. on an average backs up about)
…
[View More] 11GB , 6million files, runs for 7 hrs
filer#2:/vol/maildir2 (14 x 72 GB disks)
1 qtree:
emp (employees)
backup: (nightly incr. on an average backs up about)
8GB , 5million files, runs for 1.5 hrs
All 3 qtrees have the same 2 level directory tree structure (as
suggested by NetApp) and a common hashing algorithm is used to create
'home directories' in these qtrees. The top directory contains
sub-directories from 0-to-f. Each of those directories contain
sub-directories ranging from 00-to-ff. So a persons home directory
would be something like: /vol/maildir/grad/2/75/dummy
I need more space for the filer#1:/vol/maildir volume.
Q1: should I just expand the volume onto more disks ?
having more spindles might speed up the backup ?
Q2: should I separate the 2 qtrees (u/grad) into their own volumes (14
x 72 GB each) to give each more space ?
having only one qtree to scan , ndmp might run that much faster ?
Thanks for any suggestions.
George
[View Less]
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[View Less]
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[View Less]
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[View Less]
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[View Less]