ADSM-L

selective vs incremental backup processing times

2015-10-04 17:36:17
Subject: selective vs incremental backup processing times
From: Barbara Andrews [mailto:bandrews AT ERIE1.WNYRIC DOT ORG]
To: ADSM-L AT vm.marist DOT edu
We are running ADSM server Ver. 3 Rel. 1 Level 2.40 on an OS/390 2.7
platform.  The ADSM client is Ver. 3 Rel. 1 Level 0.7 running on a Novell
Netware 4.1.1 Server.  Does anyone have any ideas why it would take much
longer to run an incremental backup verses a selective backup?  As an
example, I specified the following object for the backup:
    vol1:users/ - subdir=yes
Here is the summary after the SELECTIVE backup:

12/17/1999 01:05:49 Total number of objects inspected:   33,116
12/17/1999 01:05:49 Total number of objects backed up:   33,116
12/17/1999 01:05:49 Total number of objects updated:          0
12/17/1999 01:05:49 Total number of objects rebound:          0
12/17/1999 01:05:49 Total number of objects deleted:          0
12/17/1999 01:05:49 Total number of objects failed:           0
12/17/1999 01:05:49 Total number of bytes transferred:     1.59 GB
12/17/1999 01:05:49 Data transfer time:                1,982.16 sec
12/17/1999 01:05:49 Network data transfer rate:          843.95 KB/sec
12/17/1999 01:05:49 Aggregate data transfer rate:        500.70 KB/sec
12/17/1999 01:05:49 Objects compressed by:                    0%
12/17/1999 01:05:49 Elapsed processing time:           00:55:40

Here is the summary after the INCREMENTAL backup the next day:

12/18/1999 08:13:41 Total number of objects inspected:   33,367
12/18/1999 08:13:41 Total number of objects backed up:      227
12/18/1999 08:13:41 Total number of objects updated:          0
12/18/1999 08:13:41 Total number of objects rebound:          0
12/18/1999 08:13:41 Total number of objects deleted:      1,286
12/18/1999 08:13:41 Total number of objects failed:           0
12/18/1999 08:13:41 Total number of bytes transferred:    55.96 MB
12/18/1999 08:13:41 Data transfer time:                  100.83 sec
12/18/1999 08:13:41 Network data transfer rate:          568.40 KB/sec
12/18/1999 08:13:41 Aggregate data transfer rate:          1.35 KB/sec
12/18/1999 08:13:41 Objects compressed by:                    0%
12/18/1999 08:13:41 Elapsed processing time:           11:46:30

We also back up another Novell Netware 4.1.1 server incrementally with no
problems.  It's client code is at a level just prior to the other server's
( 0.6).  It will typically run like the following:

Date and Time       Message
----------------------------------------------------------------------------
------------------------------------------------------------------------
------------------------------------------------------------------------
12/17/1999 21:00:34 ANE4952I (Session: 267, Node: E011LIB)  Total number of
12/17/1999 21:00:34 ANE4952I (Session: 267, Node: E011LIB)  Total number of
objects inspected:   65,642
12/17/1999 21:00:34 ANE4954I (Session: 267, Node: E011LIB)  Total number of
objects backed up:      142
12/17/1999 21:00:34 ANE4958I (Session: 267, Node: E011LIB)  Total number of
objects updated:          0
12/17/1999 21:00:34 ANE4960I (Session: 267, Node: E011LIB)  Total number of
objects rebound:          0
12/17/1999 21:00:34 ANE4957I (Session: 267, Node: E011LIB)  Total number of
objects deleted:          0
12/17/1999 21:00:34 ANE4959I (Session: 267, Node: E011LIB)  Total number of
objects failed:           3
12/17/1999 21:00:34 ANE4961I (Session: 267, Node: E011LIB)  Total number of
bytes transferred:   145.05 MB
12/17/1999 21:00:34 ANE4963I (Session: 267, Node: E011LIB)  Data transfer
time:                  148.33 sec
12/17/1999 21:00:34 ANE4966I (Session: 267, Node: E011LIB)  Network data
transfer rate:        1,001.35 KB/sec
12/17/1999 21:00:34 ANE4967I (Session: 267, Node: E011LIB)  Aggregate data
transfer rate:        236.46 KB/sec
12/17/1999 21:00:34 ANE4968I (Session: 267, Node: E011LIB)  Objects
compressed by:                    0%
12/17/1999 21:00:34 ANE4964I (Session: 267, Node: E011LIB)  Elapsed
processing time:            00:10:28
12/17/1999 21:00:35 ANR0403I Session 267 ended for node E011LIB (NetWare).
12/17/1999 21:00:37 ANR0406I Session 268 started for node E011LIB (NetWare)
(Tcp/Ip 168.169.11.20(1341)).
12/17/1999 21:00:37 ANR0403I Session 268 ended for node E011LIB (NetWare).

What could be so different about the two servers?

Any insight would be appreciated.  We are only operating ADSM in a test
mode now, but if we don't get this resolved it may never make it to
production.  Confidence levels aren't too high around here.
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