If there is a maximum (which I do not believe that there is),
90,000 is probably not it. We have several filesystems in the
100,000 - 200,000 file range. You might look at an
INSTR_CLIENT_DETAIL trace on an incremental backup of the
filesystem. It will help you assess where ADSM is spending all of
its time.

Using this type of trace, we were able to determine that for one
file server we had a fixed overhead of nearly 3.5 hours for an
incremental backup. If we only backed up 1MB from that filespace,
it would still take 3.5 hours, due to the overhead involved in
parsing a directory structure of so many files, and determining
whether or not ADSM needed to back them up.

 -- Tom

"It's a dog eat dog world,                Thomas A. La Porte
 and I'm wearing milkbone underwear."     DreamWorks SKG
              - Norm Peterson             <tlaporte AT anim.dreamworks DOT com>

On Wed, 6 May 1998, Cohn, Grant wrote:

>Greetings
>
>Is there a maximum number of files that can be backed up by ADSM in one
>file-system?
>
>We have a file-system with approx. 90 000 data files in it, and while
>doing an incremental backup of this file system, ADSM always get to the
>line : ANS4102I ***** Processed    18,500 files ***** and then stops.
>
>After the tcp-timeout period (I have set this to two hours!) we get the
>message :
>
>               ANS4017E Session rejected: TCP/IP connection failure.
>
>The same thing happens every night during our scheduled backup AND also
>happens if I do an INCR backup from the dsmc> prompt.
>
>The scheduler then says it will try again in 20 minutes, after which
>time the window period has elapsed.
>This results in this particular file-system failing and all subsequent
>file-systems not to be backed up.
>
>We are running ADSM Server 2.1.5.15
>                                  Client 2.1.10.7
>On AIX RS/6000 J30. AIX 4.1.5
>The Tape drive is an IBM 3570.
>
>This problem is happening on the server that has the 3570 attached to
>it! (Is ADSM still talking via TCP/IP in this case?)
>
>Any suggestions / ideas to try would be most welcome!!
>
>Many thanks
>
>Grant Cohn
>Shell & BP Petroleum Refineries.
>Durban, South Africa.
>e-mail : grant.cohn AT sapref DOT com
>