Resizing a Filesystem in a MC/SG cluster with OnlineJFS

[Karsten Radke]

Hi fellow admins,

a recent discussion ( http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xcb2acbaac6dcd5118ff40090279cd0f9,00.html ) dealt with the extension of a FS in a MCSG cluster without using OnlineJFS.

My question is: if i want to resize a cluster-aware logical volume, do i also have do halt the packages and to deactivate the VG even if i use OnlineJFS for my clustered filesystems ? I suppose not, but i'm not sure yet :-)

Regards,
--
KR

[Duncan Edmonstone · Accepted solution]

No, this can all be done 'live' - if your just extending an existing lvol/fs (not adding disks to VG or creating new lvol in VG) then you don't even need to export/import the VG

HTH

Duncan

[G. Vrijhoeven]

Hi,

We never changed the size of an shared volume group but we did alter the root volume groups with online JFS on a running system. You should be able pull this of, thats the primary reason you get Online JFS. In the package configuration file only the mount points and the logcal volumes are mentioned so no seze reference. You do not have to umount so i do not see why you would have to stop the package.

Hope this will help,

Gideon

[Karsten Radke]

Yeah, i see my question was somehow silly and the answers are obvious, but i really wasn't sure whether the "online" capabilities could somehow confuse MCSG. However, thank you for your answers!


Regards,

--
KR

[fg_1]

Karstan

As a safe approach, I would do a vgcfgbackup on the Volume Group first, then perform the extension with Online JFS. The extension would be seamless.

By the way, is the cluster active/active or active/passive ?

[Karsten Radke]

Hi Frank,

you are correct. It should always be a wise decision to backup the LVM configuration before a substantial change is done. I talked about an active/passive cluster, by the way. But should it really matter in this case whether the cluster is configured active/passive or active/active?


Regards,

--
KR