John Summerfield wrote "That tells me you weren't current on your
maintenance..."
Software currency is an issue, but there is very good reason why people
bring their systems down only once or twice a year for maintenance. They
lose money when they do it. The balance between having the right fixes on
and keeping the system up is an art.
Of course it is also possible in a sysplex to put maintenance on without
taking a "system wide outage". I know of a bank that has a weekly
maintenance cycle but has kept their sysplex up for more than 5 years.
While sysplex is a Z/OS thing similar things can be done with LPAR, VM and
some relatively simple "failover" scripts.
There remain a few hardware and microcode updates which require that a box
be taken down, but such maintenance is relatively rare and usually is not
urgent. Security alerts for VM and Z/OS are practically nonexistent, and
it is not necessary to take down VM to do maintenance on the Linux systems.
With disk sharing and VM, the apparent outage for maintenance of Linux can
be "virtually" eliminated.
This is one of the key elements of "TCO".
Joe Temple
[EMAIL PROTECTED]
845-435-6301 295/6301 cell 914-706-5211 home 845-338-8794
John Summerfield
<summer@computerdatas To: [EMAIL PROTECTED]
afe.com.au> cc:
Sent by: Linux on 390 Subject: Re: URGENT! really low
performance. A related question...
Port
<[EMAIL PROTECTED]
EDU>
02/18/2003 07:59 PM
Please respond to
Linux on 390 Port
> I just IPL'ed the S/390 Sunday 2/9/03 it was up since we installed our
new
> MP3000 1/9/02 that's January 9, 2002. I IPLed to install
> Z/VM 4.3.0 (Scheduled Change)
>
That tells me you weren't current with your maintenance;-)
If you looked at the security advisories and decided they were not needed,
that's fine. However, I suspect that many people who report how long
*their*
systems have been up have neglected their maintenance.
--
Cheers
John Summerfield
Microsoft's most solid OS: http://www.geocities.com/rcwoolley/
Note: mail delivered to me is deemed to be intended for me, for my
disposition.
==============================
If you don't like being told you're wrong,
be right!
