Re: [Networker] Slow Win2k backup with lots of files
2006-06-07 10:37:51
Our environment is weird Dave. We have a SAN (HDS TagmaStore connected to
a Brocade 24000) but due to mgmt directive, we are continuing to back up
these million-file clients over IP rather than through the SAN. So that
probably accounts for the slow performance I spoke of earlier.
-ty
Phillip T. ("Ty") Young, DMA
Manager, Data Center and Backup/Recovery Services
Information Services
i2 Technologies, Inc.
Dave Mussulman
<mussulma AT uiuc DOT ed
u> To
Legato NetWorker discussion
06/07/2006 09:28 <NETWORKER AT LISTSERV.TEMPLE DOT EDU>,
AM Phillip_Young AT I2 DOT COM
cc
Subject
Re: [Networker] Slow Win2k backup
with lots of files
On Wed, Jun 07, 2006 at 09:06:40AM -0500, Ty Young wrote:
> Just so you don't feel alone, I have run into exactly the same problem.
> In my environment there are a number (> 5) of Windows machines with
> millions of files within about 75 directories, all under "E:\" which are
> supposedly business-critical. I used to be able to make the excuse
that
> the symptoms you're describing are simply inherent with Windows, i.e.
tons
> of tiny binary files, but this isn't always the case any longer.
>
> But truthfully you're not alone and I think the disk-based backup (to
which
> you could stage off to tape) is probably what a lot of shops use to get
> past this issue.
That argument implies (to me) that the tape infrastructure is the
bottleneck. I would imagine if you have a system with too many files,
and that file system crawling process is the slowdown, it's not going to
matter if it's being copied to disk or tape - performance should be
about the same.
I spent a second looking to see if I have any good collected data on our
environment on backup speeds, and unfortunately all I have is anecdotal
observations. Our main file servers (which are Win2k3 storage servers,)
have millions of small files over large directory structures, and backup
(relatively) quickly -- I don't have any complaints about their backup
speeds. I credit that to quantity and speed of the disks in the SAN
that make up its LUNs. I also backup research group systems with very
large file systems on single spindle DAS disks, and those are the ones
that perform terribly, taking hours to walk/check the file system.
However, revisiting my first paragraph, if your D2D storage is on better
disk than the source disk, I guess it's possible you'd get better
performance later when it copies to tape. But that doesn't seem to
solve the first copy problem (unless I'm missing something - if so,
please clue me in.)
Dave
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- Re: [Networker] [I] Re: [Networker] Strange MMINFO results, (continued)
- Re: [Networker] Slow Win2k backup with lots of files, Brian Narkinsky
- [Networker] Slow Win2k backup with lots of files, Fazil Saiyed
- Re: [Networker] Slow Win2k backup with lots of files, Albert Eddie Contractor AFRPA CIO/IT
- Re: [Networker] Slow Win2k backup with lots of files, Dewhirst, Rob
- Re: [Networker] Slow Win2k backup with lots of files, Dewhirst, Rob
- Re: [Networker] Slow Win2k backup with lots of files, Dewhirst, Rob
- Re: [Networker] Slow Win2k backup with lots of files, Faidherbe, Thierry
- Re: [Networker] Slow Win2k backup with lots of files, Oscar Olsson
Re: [Networker] Slow Win2k backup with lots of files, Brian Narkinsky
Re: [Networker] Slow Win2k backup with lots of files, Dewhirst, Rob
Re: [Networker] Slow Win2k backup with lots of files, Dewhirst, Rob
Re: [Networker] Slow Win2k backup with lots of files, Albert Eddie Contractor AFRPA CIO/IT
Re: [Networker] Slow Win2k backup with lots of files, Steve Warren
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