We actually have 2 NAS 760 filers - 1 for the UNIX team, 1 for NT. The UNIX
team backs up the NAS using NFS mounts over the network (NetBackup). That is
not painful. We get nice, indexed backups, can slice them up according to
NFS mounts, and get great performance - 20 GB/hour or 5-6 MB/second per
drive. We are using Gb ethernet, so that's something to consider. We are
able to split up the fulls, and do them throughout the month. This makes our
backup windows acceptable, and restores much faster.
The NT group's NAS has two DLT's directly attached, and uses NDMP/NetBackup
to do the backups. Problems:
1) The RESTORES are horrendous - no indexes, so the entire backup is
"scanned" for the requested files/directories.
2) Can't share the DLT's with non-NDMP boxes, so they sit idle a lot
of the time.
3) Differential Incremental (daily) backups are HUGE - NDMP doesn't
look at the Archive bit, but rather "last accessed time". We back up
approximately 20% every night as a result. Should be closer to 1-2%.
4) Proprietary tape format - not "generic" like tar or NT tape
format. Need NDMP to restore - not good for DRP.
5) Direct attached tapes do not keep up with our UNIX "networked"
speeds! Explain that one! They get about 17 GB/hour vs. our 20+ GB/hour.
So...that's why I hate NDMP, and in fact NAS. However, $ for $, NAS is hard
to beat for file storage, which is why they are becoming so popular.
Kim
-----Original Message-----
From: sq01 AT yorku DOT ca [mailto:sq01 AT yorku DOT ca]
Sent: Wednesday, January 17, 2001 9:50 AM
To: Pearson, Kim (STP)
Subject: Re: [Veritas-bu] Sharing library between NT and UNIX media
servers
Hi Kim,
I'm curious as to why you're rejecting NDMP ? We'd originally gone the
"backup via NFS route" and thought *that* was quite painful.
---
On Jan 17, 9:10am, Pearson, Kim (STP) wrote:
> Subject: [Veritas-bu] Sharing library between NT and UNIX media servers
> Are there any issues we need to be aware of when sharing a Storage Tek
9740
> with an NT media server?
>
> We are currently using a Sun E450 as the master/media server. We have a
> Network Appliance attached to two of the DLT drives on the 9740, using
NDMP
> for backups (BIG MISTAKE!!!). We would like to move the NetApp backups to
an
> NT media server, and LOSE NDMP forever! The NT media server would then
mount
> NetApp shares over the network, and backup the NT media server drives as
if
> they are local drives. Of course, this means network traffic, but never
mind
> that. Anything is better than NDMP. Bottom line - we need to move the two
> DLT drives off of the NAS, and put them on an NT device. Any control
issues?
> Sharing library problems? Other info - NBU 3.2, NT 4.0, Solaris 2.6...
>
> Any and all comments welcome and appreciated!!
>
> Kim
> _______________________________________________
> Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>-- End of excerpt from Pearson, Kim (STP)
--
/Steve
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