We recently migrated all our individual ifs docs (.tif images) - more than
your 15 million images on disk to image catalogs. This was on a Power 5-525
and even though many images were on optical platters (3995 C46 Optical
Jukebox), the move allowed us to remove the 3995, which was keeping us from
moving to Power 7+. While still at V7R1 on Power 5, we found the performance
of our 3573 tape (ultrium 3) was so much better we finally got a full system
save, including images. Prior to this, our images were backed onto the 3995,
and the IFS directory *ALWSAV attribute was *no for the image directories.
A couple questions:
1. Since you obviously don't change 15 million images a day, if saving only
changed not an easy option, are your changed directories only a small subset
of the static directories? Is your WebDocs only populating only a smaller
set of directories and can you save only those nightly? The other static
directories could be saved once, and then set *alwsav to *no (it's easy with
subtree option). When we moved to image catalogs, because they have a limit
in size, we have 10 catalogs, but only 3 are for new images. So we only back
up the 3 each night. The other 7 are static, and on a separate save and put
in our DR collection. btw, we did use IBM Services "special" program to
convert optical platters to Virtual Optical and the catalogs work as if real
optical, only very fast.
2. If you have private authorities on the images, or any other large number
of objects, need to run this command:
PRTPRFINT SELECT(*PCTFULL) PCTFULL(0.60) Print Profile Internals
There should not be user profiles with %Private Auth Entries over 0.60
This kills the SAVSECDTA of your full save or if run separate (this we got
from support recommendation).
We set our directories and objects owned by a group, with an auth list
Work with Authority
Object . . . . . . . . . . . . : /ekdvirtual/IMGCLG01
Type . . . . . . . . . . . . . : DIR
Owner . . . . . . . . . . . . : GR_WAFEKD
Primary group . . . . . . . . : QVIGROUP
Authorization list . . . . . . : IMAGEFILES
Data --Object Authorities--
Opt User Authority Exist Mgt Alter Ref
3. There are a few quirks with image catalogs if considering this - need to
unload catalogs before save (and our catalogs large enough to take 30-40
minutes to unload all) - this probably would be a a whole thread (and we had
several postings on midrange and a few support calls).
4. We did upgrade to 7.1, a new Power 7+, newer faster drives, 3573 Ultrium
5 drive, fiber attach - saves are 30% faster.
----- Original Message -----
From: "Stone, Joel" <Joel.Stone@xxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Sent: Tuesday, July 15, 2014 4:47 PM
Subject: backups of large IFS to tape
We are currently using a document management system (Webdocs) that stores
docs on the iseries IFS.
We have 15 million docs spread across 50 folders. It takes over 24 hours
to back up the IFS onto tape on v5r4.
Is there a faster method to backup IFS to tape on the iseries?
Will v7r1 provide a faster backup product or service?
We need a method that will allow individual restores of objects, so SAVSTG
probably wouldn't help.
Any other ideas to speed up the backup?
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