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Re: [Veritas-bu] Best Practice: Location of the NetBackup Catalog
2008-05-13 17:25:49
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).
.../Ed
--
Ed Wilts, Mounds View, MN, USA
RHCE, BCFP, BCSD, SCSP
mailto:ewilts AT ewilts DOT org
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