I am not aware of any problems with RESIZE CONCURRENT that resulted in a
corrupt file.
There is a problem that can occur that results in a WRITE failure, but not
physical file corruption. From the 7.2.8 readme (for Linux you will need to
upgrade to 7.2.9):
Issue UDT-3787 - Problem Description
UniBasic -- After a RESIZE CONCURRENT command had been run on any UniData
file on a server, subsequent updates to records in another UniData file
could result in a fatal UniBasic runtime error:
U_LLM_Release error 7
This problem occurred very rarely. While it could occur with an update
to any UniData file type, it had only been reported with updates to a
DIR-type file within UniBasic.
Wally Terhune
U2 Support Architect
Rocket Software
4600 South Ulster Street, Suite 1100 **Denver, CO 80237 **USA
Tel: +1.720.475.8055
Email: [email protected]
Web: www.rocketsoftware.com/u2
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Dan McGrath
Sent: Tuesday, May 03, 2011 4:23 PM
To: U2 Users List
Subject: Re: [U2] Unidata RESIZE CONCURRENT
Upgrade to 7.2.8 before you try it.
We tried this on 7.2.5 in Dev and required a reboot from corruption. We
were informed we need to upgrade 7.2.8 to get the fix for it.
As always, I'd suggest doing anything new a few times on a Dev server
before trying it on a Production server.
Cheers,
dan
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Jeff Butera
Sent: Wednesday, 4 May 2011 8:11 AM
To: [email protected]
Subject: [U2] Unidata RESIZE CONCURRENT
Unidata 7.2.5 on RedHat.
Historically, we have had downtime and a brief (1 hour) maintenance
window each week where we memresize our files. We'd like to switchover
to RESIZE/CONCURRENT to reduce downtime and would like to hear from
anyone doing this on a production system.
It's not that I don't trust it: I'm just looking for insight, gotchas,
pros/cons of memresize vs RESIZE or other input from those who might've
gone down this road already.
TIA,
--
Jeff Butera, PhD
Manager of ERP Systems
Hampshire College
413-559-5556
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