Okay, I'll bite - although I cannot contribute too much...
Where I am, we are backing up data on a Symmetrix - but only through
individual workstations and only the locally mounted file systems. We have
two separate SANs, one for EMC disk and one for tape libraries. Big systems
will have two fiber cards installed and media manager instances on them, but
small systems only have a disk fiber card, and back up via a dedicated
backup network to dedicated media servers (with local disk and a SAN fiber
card in them).
This whole layout is rather complex, but I think there are serious concerns
that our outfit would have in doing what you propose. First mixing EMC disk
and SCSI tape SAN traffic would be bad for us - our tape SAN is unzoned,
while our disk SAN is not, and we also might have serious traffic/routing
contention issues. Secondly, most of our file systems and database chunks on
the Symmetrix are very active, and the only way I know we cane get
consistent raw disk backups of an EMC disk is by acquiescing a disk/database
instance and breaking off the "third mirror" for an "offline" backup (I've
seen this called a BCV backup.) We are also starting to do SRDF between
Symmetrix arrays, so that could complicate the disk consistency issues in
this case.
This does not mean was you suggest may not be possible, but I suspect it
could be very problematic. Perhaps there are some Symmmetix gurus on this
list that can enlighten both of us on what is reasonably doable here and
what is not. (It may depend a lot on what model and firmware version your
Symmetrix array is as well.)
Hope it helps,
- MW
PS. Those of you doing BCV backups out there, how do you coordinate the
mirror break off with running a scheduled backup? Inquiring minds want to
know...
-----Original Message-----
From: Doran, Frank [mailto:fdoran AT concordefs DOT com]
Sent: Thursday, May 01, 2003 6:06 AM
To: 'Veritas-bu AT mailman.eng.auburn DOT edu'
Hello,
We are currently running NetBackup 4.5 with a Solaris 8 Master/Media server
with 4 NT Media Servers and 11 Solaris Media Servers. The Media Servers are
connected to a StorageTek SN6000 tape san. These are all backing up data
that is direct attached to approx 150 NT and UNIX clients. We recently
purchased a Symmetrix DMX 2000 and plan to migrate all of our data to this
SAN. In addition to this migration, we are also consolidating our 60 UNIX
Clients/Media servers to domains on three Sun 15K servers. My questions Are:
1. How are other Veritas clients backing up data on a Symmetrix?
2. Instead of Media Servers on the new 15K domains, could we dedicate
other servers as backup servers, connect these to the tape and disk SANs,
and take the load off of the servers were the applications are?
3. If #2 can be done, are there any backup and restore considerations?
Thanks,
Frank
fdoran AT neteps DOT com
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