topic Re: concetanation in Operating System - HP-UX

concetanation

Indrajit Bhagat — Fri, 04 Jan 2008 11:51:58 GMT

How to create a file system in concetanation in lvm.

Re: concetanation

Torsten. — Fri, 04 Jan 2008 12:39:46 GMT

concatenation?

What do you want to concatenate?

Re: concetanation

Ralph Grothe — Fri, 04 Jan 2008 12:53:41 GMT

I guess he is referring to a volume manager concat.
Usually for any LV that wasn't created with the contiguous flag (e.g. lvol[1-3] of vg00) LVM simply takes the next free PEs available of a contained PV during an lvextend.
So there is nothing special about concatenation.
If you run out of free PEs just get a new disk, pvcreate a PV and vgextend it into the VG of whose LV you need to lvextend.

Re: concetanation

Indrajit Bhagat — Fri, 04 Jan 2008 13:12:50 GMT

Yes, i am talking about concatenated volume.

Like we are creating mirror of volume.

So how can we create a concatenated & RAID-5 volume in LVM

Re: concetanation

Torsten. — Fri, 04 Jan 2008 13:14:58 GMT

Still not sure what you want to do, but there is no RAID 5 possible with LVM.

Re: concetanation

Tim Nelson — Fri, 04 Jan 2008 14:44:25 GMT

The only 0+1 option natively though LVM is distributed striping with mirroring.

The biggest difference is that the striping is by LV extent, i.e. 1MB or 2MB, not 2k, 4k etc..

Read the man page about lvcreate -D and -s options.

Concatenation is the joining two or more sets contiguously or in array speak two or more disks are joined together back to back, filling from the beginning of disk 1 then continuing on to disk2 once disk 1 is full.