ADSM-L

[ADSM-L] Lib client mounts and firewall timeouts.

2014-05-27 05:23:09
Subject: [ADSM-L] Lib client mounts and firewall timeouts.
From: Steven Harris <steve AT STEVENHARRIS DOT INFO>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 27 May 2014 19:21:58 +1000
Hi All

I have a situation that is causing me grief.  As part of a V5 to V6
upgrade I have implemented library managers.  These live in one part of
the network and the library clients live in another separated by a
firewall.  The customer insists that timeouts be implemented on the
firewall for any session over 60 minutes: its a security thing for some
reason and is non-negotiable.

At times I get a lot of mounts queued, in the past when these were local
mounts, they would eventually resolve themselves but now they time out
in the firewall, never complete, and I get a cascading blockage until
the whole server grinds to a halt.

I'm told I can set recourcetimeout to less than the firewall timeout and
that will cause the mounts to fail, but a lot of these are oracle and
DB2 backups and they won't retry in a reasonable manner.

Yes, I could use devicelasses and mount limits to reserve drives, and I
could put some stuff on disk that now goes direct to tape, but neither
of those are palatable.

Of course the easiest thing would be to have the library clients use
keepalives on their sessions, as was added in recent versions for NDMP
backups.  I have raised an RFE to this effect at

http://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe&CR_ID=54030

and I'd appreciate your votes.

Does anyone have bright ideas on how to proceed?  I have thought about SSL port 
forwarding, but apparently bypassing the controls that way is frowned upon. 
Even if the RFE gets up, it won't help me as half of the clients are still TSM 
5.5 for the next six months or so while we cut them over.

Thanks

Steve

Steven Harris
TSM Admin
Canberra Australia.

<Prev in Thread] Current Thread [Next in Thread>