On Tue, 3 Oct 2000, Paul Blackburn wrote:
// One thing puzzles me: if I run an ADSM file backup
// (or any backup that traverses directories like tar)
// doesn't that mean that the entire filetree being
// backed up has to be accessed via the AFS cache?
//
// It doesn't seem very efficient compared with
// doing a regular AFS backup by volume.
// --
// cheers
// paul http://acm.org/~mpb
//
You are correct on both counts... everything does go through the cache,
and it's not as efficient as doing backup by volume (for more reasons
than just the cache). However, using a memory cache rather than a disk
cache reduces this. We have been doing back by vol and are currently
investigating going to a combination of back by vol and by file so that we
don't have to keep as much data around.
There are advantages and disadvantages to both methods; the trick is
finding the right choice for your site based on data retention, backup
window, and TSM(ADSM) server requirements.
-
Best regards,
Brian
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| Brian T. Huntley Systems and Network Engineer |
| Campus Information Services, Clarkson University |
| Ph/FAX: 315.268-6723/6570 |
| [EMAIL PROTECTED] www.clarkson.edu/cis |
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