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10-15-2002 09:49 AM
10-15-2002 09:49 AM
I want to extend a filesystem online that is a part of a MC/Service Guard package. I have Online JFS installed on my HP-UX 11.00 system(s). The 'man' page for 'lvextend' states that is does not work on a logical volume in shared mode. What does this mean? Is this the same as a volume group being cluster aware or activated in exclusive mode? Can I do this online on a MC/ServiceGuarded logical volume without disturbing the package? If so, how?
Any help would be appreciated!
Solved! Go to Solution.
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10-15-2002 09:55 AM
10-15-2002 09:55 AM
Re: MC/Service Guard and Online JFS
If you are working on a VG in ServiceGuard, the VG will be activated in exclusive mode. You can lvextend it with no problem. It shouldn't bother the package.
I think the shared mode is a funky mode for a VG that is used on two different systems at the same time. I did that by acccident on a box once and I don't really want to talk about it! ;)
JP
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10-15-2002 09:58 AM
10-15-2002 09:58 AM
SolutionAssuming you are not running OPS , you can increase the file system online .
DO an lvextend to extend the logical volume .
DO an fsadm so that the file system is aware of the extra space .
And thats it .
Remember if u r adding an extra PV to the VG for your lvextend , then u will have to export the VG and import it back on the adoptive nodes . But if you VG has enough space , then u just have to perform lvextend and fsadm provided you have online JFS .
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10-15-2002 10:03 AM
10-15-2002 10:03 AM
Re: MC/Service Guard and Online JFS
One main reason, the vg config needs to exist on the other node for failover reasons, so I would shy away from doing it while the package is running.
The easiest way to handle it:
Halt the package (this will umount the lv)
vgchange -a n (deactivate the vg)
vgchange -c n (remove cluster mark)
vgchange -a y (activate the vg)
Make your changes to the LV
Do your vgcfgbackup to create a new map file
distribute to other node(s) in cluster
vgchange -a n (deactivate vg again)
vgchange -c y (set cluster mark)
Restart the package
Others may have more viable solutions, but this is just a suggestion..
HTH,
Mike-
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10-15-2002 10:04 AM
10-15-2002 10:04 AM
Re: MC/Service Guard and Online JFS
If I extend a filesystem in MC/ServiceGuard, I DO NOT have to export the mapfile from the primary node to the other nodes correct? The mapfile does not hold the size of the logical volume, only the disk information (ctd #s and lv names) correct?
Thanks again!
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10-15-2002 10:07 AM
10-15-2002 10:07 AM
Re: MC/Service Guard and Online JFS
JP