Rob,
I watched a few HA/DR demos, and in the demos they make the role swap seem "seem less" less than 1 minute, users do not need to signoff, etc.
This is where I think there is "a black hole" with the HA/DR solutions.
Or, does a solution exist where it is "seem less"
Paul
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Thursday, December 17, 2015 2:56 PM
To: Midrange Systems Technical Discussion
Subject: RE: Disaster recovery solutions
Quiescing the system is where the time is spent. Ok, Mimix has a command called RUNSWTFWK. This is the one we modified to change the DNS and everything else. I think this takes 8 minutes, tops.
However, when you add in quiescing you're now talking about a 43 minute process.
Think of it like this.
SNDBRKMSG type process to everyone "Sign the heck off. System dies in 5 minutes. All should be well and running on the backup system in well under an hour"
ENDSBS QINTER DLY(600)
...
...
...
No kidding. I have an intense check list with a bunch of "Write down time_________" kind of stuff. Joblog is PDF'd and emailed to me.
We know that we could shave some time off of that. Cut it in half is very doubtful.
I feel your concern. There is talk of moving the switch from 7pmET (5pmMT-we have a large facility on that time zone) on Friday night to maybe Saturday morning.
We would still have plenty of time most downtime weekends to do OS upgrades (we upgraded several lpars this last weekend) and whatnot. We might have to revert back to Friday for those rare unload/reload situations.
Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com
From: "Steinmetz, Paul" <PSteinmetz@xxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 12/17/2015 11:50 AM
Subject: RE: Disaster recovery solutions
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
Rob,
When you test your fail overs, do you have any jobs that have to be
peacefully ended, do the failover, then start those jobs on the DR box.
Our Production LPAR has many jobs (100+) that communicate with remote
servers.
From what I've been told, these would all have to be brought down
peacefully, role swap, then restart.
This entire process could be 10 to 20 minutes.
So during the role swap, the system is basically unavailable.
Paul
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
rob@xxxxxxxxx
Sent: Thursday, December 17, 2015 11:37 AM
To: Midrange Systems Technical Discussion
Subject: RE: Disaster recovery solutions
Is stuff like this built in to ibmiinthecloud.com?
We're on premises for IBM i stuff. We have three Power 8's. I work at
the 'off-site'. Kind of peaceful here. We use Mimix. We do our nightly
backups here off of the Mimix data. We test fail over's quarterly. Like
last weekend.
Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com
From: "Steinmetz, Paul" <PSteinmetz@xxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 12/17/2015 11:02 AM
Subject: RE: Disaster recovery solutions
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
Richard,
I'm working on a very similar situation with our company.
They want a number (approaching 7 digits), but are not willing to spend
the time to answer all the requirement questions first.
Below is a link I recently discovered while searching the archives.
Community Post: List of IBM i High Availability Vendors
http://joehertvik.com/community-post-list-of-ibm-i-high-availability-vendors/
Paul
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Richard Reeve
Sent: Thursday, December 17, 2015 9:45 AM
To: Midrange Systems Technical Discussion
Subject: Disaster recovery solutions
All,
One of my clients is looking for a disaster recovery solution. They
are privately held. The system is a model E4A with processor code 5634.
The system has 3 LPARS. Production (2109 G of Disk), Test (372.8 G of
Disk) and a development environment that has yet to be set up. They are
on
7.1 and run PRMS and some custom code. There are 4 plants and about 150
users.
We are looking for a cost effective solution that can be implemented
in a day or 2.
Any thoughts/advise are welcome.
Thanks much.
Rich
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