Re: [Veritas-bu] Best Practice: Location of the NetBackupCatalog
2008-05-14 11:19:03
Hello Larry
You could colour your beard :-) I cannot believe Ed is that
old !
Simon
Simon,
I work with Ed. My beard is gray, Ed doesn't have
a beard, but he is older than both of us. Respect your elders!
;-}
--Larry
On 5/14/08, WEAVER, Simon
(external) <simon.weaver AT astrium.eads DOT net>
wrote:
Ed, 34
years old and probably older than yourself young man, but as posted, some of
the failures I have seen have been quite interesting to see
:-)
Thanks for
your reply
Warm
Regards
Simon
On Mon, May 12, 2008 at 10:13 AM, WEAVER, Simon (external) <simon.weaver AT astrium.eads DOT net> wrote:
Presently, I have NetBackup and
the catalog installed locally, on RAID5 set, hot
swappable.
If you lose 2 drives in somewhat rapid succession, your catalog is
gone. The 2nd drive typically fails while you're rebuilding the RAIDset
after the first one dies due to the high load put on the drives. If you
haven't seen a double-disk failure yet, you're not old enough. Whether
the drives are hot swappable or not doesn't matter. What matters is
whether the RAID rebuild completes before the 2nd drive dies. The race
is on and sometimes the RAID rebuild doesn't complete in
time.
My question is this: Is there a
best practice for the location of the Catalog? For example, SAN attached
disk? I sort of feel uncomfortable with this for several reasons:
1) If you lose SAN connectivity
(due to a major disaster or failure) the catalog has gone
If you lose SAN connectivity, you lose*access* to the catalog - you don't
lose the catalog.
Being stored locally, means the
Server and its application (including the catalog) goes with it, and does
not rely on an extra layer of hardware for the catalog to be
available.
I think my concerns come from a
previous environment where the catalog was stored on a SAN, and was
totally destroyed and unrecoverable, which meant a complete import of
hundreds of tapes.
The likelihood of a well managed enterprise SAN destroying the data is
FAR less likely than a double-disk failure of a RAID-5 set. FAR, FAR,
FAR less.
If anyone has any feedback on this,
would like to hear the pro's and con's to storage off the physical server
itself. I have always had the catalog locally
stored.
My catalog is on the SAN. It's replicated to another SAN
array. It's also backed up to tape and the recovery information is
emailed to my home email address (since my work email is also
SAN-based). If you can't trust the reliability of your
SAN, get another SAN and/or SAN admin. And I'm a SAN admin...
.../Ed -- Ed Wilts, Mounds View, MN,
USA RHCE, BCFP, BCSD, SCSP mailto:ewilts AT ewilts DOT org
If
I've helped you, please make a donation to my favorite charity at http://firstgiving.com/edwilts
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