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Good evening all,
I'm in the process of setting up another media server which will have
7TB of staging disk.
What have your experiences been with filesystem type X's performance
over Filesystem type Y ?
I'm running on a Solaris media server, so my interest directly lies with
UFS, VXFS, ZFS, or
I'm curious about NUMBER_DATA_BUFFERS_RESTORE and duplication performance as
well. Anybody know this definitively?
From: [EMAIL PROTECTED] on behalf of Peters, Devon C
Sent: Tue 11/20/2007 1:32 PM
To: VERITAS-BU@mailman.eng.auburn.edu
Subject: Re: [Veritas-bu]
Buffers in memory to disk would be dependent on how much cache the raid
controller has yeah?
Justin.
On Wed, 21 Nov 2007, Mike Andres wrote:
I'm curious about NUMBER_DATA_BUFFERS_RESTORE and duplication performance as
well. Anybody know this definitively?
Hi All
I am imminently upgrading a Solaris 8 master server from 5.1 MP6 to 6.5
in preparation for the rest of our environments
I have been reading through all the documentation and there are a lot of
references to clustered environments, now I am taking that the
documentation id referring
To add to your sparsely and vaguely documented documentation: We
frequently have to reset one of the fibre HBAs on our HP-UX master
server attached to our fibre bridges for SCSI tape drives on the L700
tape library to clear issues. The idea of having those HBAs also be
the point of entry for
I also was a little confused by this, but as long as the NetBackup install
itself is not clustered on any of the servers, then this does not apply to
you.
-Rusty
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Clooney,
David
Sent: Wednesday, November 21, 2007 10:47 AM
Funny - you seem to have ignored the command line I gave you that DOES
give you the tapes used for a specific backup.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Alexander Skwar
Sent: Wednesday, November 21, 2007 2:19 AM
To: Veritas Backup Mailinglist
Following up on my own finding, it appears that I can successfully restore
from other 5.1 backup types (Windows, Standard), but NDMP still has the
issue. I am not able to test if the 6.5 NDMP backups can successfully be
restored until after the holiday.
I'm still wondering if anyone else has run
Not sure if this question was directed at Mike or myself, but if it was
directed to me...
In our case, the memory buffers for the disk are the shared memory
buffers on the media server (T2000). When a media server is backing up
itself, the bpbkar process reads from disk directly into the
Something you wrote didn't sound quite right.
Bpbkar writes to the child bptm using TCP sockets which is a bottleneck.
The child bptm process or processes, depending on MPX, write to shared
memory, The parent bptm reads from shared memory and writes it to the
tape.
I still use 5.1 so this may
We are trying to phase our our LTO 2 tapes as we go to LTO 3. My thought is
that I will freeze or suspend the tapes and when they expire we can remove them
from service. Does this seem logical? Also, is there a way to freeze a range of
tapes? I do not have a good understanding of
I've done only tests using disk staging with JBOD and SAN attached disks.
UFS performed pretty well.
VxFS was a bit slow on clearing image files, but that wasn't a huge
problem as the image cleanup didn't always happen when I was trying to
write new ones. Since it was VxFS, I could manage it
Actually, the other way around. Suspended media cannot be written to by
Netbackup until all the images on it expire. Sort of a logical tape
write protect - until the expiration date. Then it goes back to
unassigned / into the scratch pool. Freezing a media means Netbackup
will never expire or
I just did a test, and it looks like the duplication process uses
NUMBER_DATA_BUFFERS for both read and write drives. I'm guessing that
there's just a single set of buffers used by both read and write
processes, rather than a separate set of buffers for each process...
Config on the test
My recollection is that during duplication from VTL to tape , it uses
the mpx originally set in the policy unless it is throttled down by the
vault policy but you can't increase it. The MPX is what is so
interesting to examine in truss because I observed that any multiplexing
will impact the
Part 1 of 2
Matt,
This applies to 5.1 and below.
Also, triple check all advice because I could be wrong. I don't have
access to production NBU systems so this is from memory and my notes.
Also I am writing without providing a full explanation. So I will
include some notes at the bottom
Has anyone here done benchmarks to see what type of potential speed up is
gained with the NUMBER_DATA_BUFFERS_RESTORE directive?
On Wed, 21 Nov 2007, Peters, Devon C wrote:
I just did a test, and it looks like the duplication process uses
NUMBER_DATA_BUFFERS for both read and write drives.
For our SAN media servers, we do see restore performance gains with this
setting. The difference between the default setting, and 512 has been
around 20% for us. We haven't done a whole lot of tuning or analisys on
this - I just set it to match NUMBER_DATA_BUFFERS. :)
For our less
Hi Matt,
My understanding is this
If a volume is SUSPENDED the system will not write to it until all the
backup images on that volume have expired. (either automatically or if
manual expiry which can be carried out using the command tool BPEXPDATE)
If a volume is frozen the system will not
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