Originally posted by: SystemAdmin

I have implemented an HACMP 5.4 (3 node cluster) on Aix 5.3 {oslevel 5300-07}. This server has all the requisites mentioned in the ha_install guide.This setup only has ip based Communication Interfaces. I was successful in creating a concurrent VG from "smit cl_admin". But this volume does not show up in "C-SPOC" --> List All Concurrent Volume Groups. It throws an error like "cl_lsvg: no volume groups found".

Also when I try to manually bring up the VG in passive mode it gives the below error:

516-1751 /usr/sbin/varyonvg: The command /usr/sbin/tellclvmd returned
the following error:
The gsclvmd daemon is not running.
I tried bringing this subsystem which goes ahead without any errors but is not started. How do I bring this service online? would bringing this online solve the "volume groups not found " error ?

Thanks,
Ash
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Originally posted by: SystemAdmin

The "alog" output is as seen below:

alog -t lvmgs -o
:::
:::
1 381012 1 02/08/08-14:45:46:721 gsclvmd.c 452 initialize_daemon: FAIL: None of the variable CT_DOMAIN/HA_GS_SUBSYS set. So exiting
3 381012 1 02/08/08-14:45:46:721 gsutility.c 1955 logerr: errid=ERRID_LVM_GS_NOENV (0x9bd08d55)
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Originally posted by: alethad

Can you see your concurrent VG's in "HACMP Logical Volume Management" menus NOT the concurrent volume management? Even though the volume groups look concurrent they may not be truly concurrent. Mine look concurrent but they aren't which was new to me in HA5.3.

As far as the gsclvmd, Have you stopped HACMP completely then re-started it? Is there any error in the hacmp.out file? Sometimes you'll get errors there along with the regular log files.

Just 2 cents.
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Originally posted by: SystemAdmin

Hi,
Thanks for your reply. This is the first time I was implementing HACMP. As it stands I rebooted all the nodes and thought the services would start own its own. After seeing this post I checked on how to start it, after which it was fairly straight forward :)
Now I was able to import the concurrent volumes on all the three nodes. Is there a way to create a file system on an LV from this volume and mount the same on all the 3 nodes. Would this constitute an active/active HACMP?
By the way is there any document which gives a simpler step-by-step info on creating this cluster in an active/active configuration.
I had to go through many documents to get an idea of implementing it.

Regards,
Ash
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Originally posted by: alethad

The services aren't designed to start on their own which is the wiser way to go.

I would highly recommend getting to at least the planning and installation HA class if possible. I know alot of people can't but it is WELL worth it. Or you will be stuck looking thru many documents like you're already doing. None of the docs are good for troubleshooting beyond the basics. It really depends on what type of cluster you're configuring as to what you'll find in the docs too. Most address the basic 2-node cluster configuration which is what I have.

With HA 5.3 and up once you get the VG's created and seen by the other nodes you can actually mount the filesystems on both nodes. VG's are now required to be created as enhanced concurrent. So yes you will be able to mount your filesystems between nodes. Test it first. We don't use our filesystems concurrently and we weren't happy to find out it could be done even accidentally. In previous versions we didn't have this issue. So you have to be very very careful when you make changes to the VG or lv's. If my memory serves me today only 1 node has control of the VG at a time even though you can access it from another nodea. If the controlling node goes down the VG goes down.

Get notes on the lazy update also. It's simpler than it used to be but very helpful at times.

Good luck.
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Originally posted by: the_cyberdude

Check out some IBM Redbooks for sample configurations on http://www.redbooks.ibm.com/.

Setting up HACMP is one thing, testing it so that you have eliminated SPOF is another, so that you really know that HACMP will work when you need it.

BTW "Concurrent access does not support file systems.", page 110 in the HACMP Planning and Installation Guide Version 5.4.1, SC23-5209-01.

Message was edited by: the_cyberdude
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