topic Re: limit of size for a lvol vxfs in Operating System - HP-UX

limit of size for a lvol vxfs

Alberto Hurtado — Wed, 10 Dec 2003 11:01:06 GMT

i have a f.s. of this size and i am planning extends 40 Gb more. somebody know if are there a limit of size for one logical volume or if i could have a problem of administration ?

this is the bdf...
Filesystem kbytes used avail %used Mounted on
/dev/vg05/lvol1 96628736 95155464 1461768 98% /archived

Thanks a lot to all

Re: limit of size for a lvol vxfs

DIPAK KUMAR ROY — Wed, 10 Dec 2003 11:03:12 GMT

You can go upto 255 GB.

Thanks

Re: limit of size for a lvol vxfs

Massimo Bianchi — Wed, 10 Dec 2003 11:03:20 GMT

Apart from support tables, they exists but i do not rememeber where, up to 200Gb on a HPUX 11.00 you are fine, i have dozens on them on a customer.

Massimo

Re: limit of size for a lvol vxfs

Alberto Hurtado — Wed, 10 Dec 2003 11:06:00 GMT

i have a server v2250 with HPUX 11.00

Re: limit of size for a lvol vxfs

Helen French — Wed, 10 Dec 2003 11:08:55 GMT

If properly patched, the implementation limit (for your system 11.00) on size for a single logical volume (and thus file system)is 16777216 MB (~16TB).

# man lvcreate

Re: limit of size for a lvol vxfs

Alberto Hurtado — Wed, 10 Dec 2003 11:25:46 GMT

great, UNIX o HPUX it's amazing.... i am proceed to extend 40 gb just that i need it. But iam looking for patch of LVM on 11.00

Thanks dear friends and masters.

Re: limit of size for a lvol vxfs

Helen French — Wed, 10 Dec 2003 11:34:19 GMT

Do a custom patch analysis on your system and download the latest patches available for your system. You can do this with ITRC custom patch analysis:

http://www1.itrc.hp.com/service/patch/assessSystemsPage.do

Re: limit of size for a lvol vxfs

Jeff Schussele — Wed, 10 Dec 2003 11:47:29 GMT

Hi Shiju,

Are you sure on that 16TB limit?
A properly patched 11.0 with JFS 3.3ver4 is only 1TB. For 11i JFS3.3ver 4 limit would be 2 TB.

Alberto - see the following link:

http://docs.hp.com/hpux/onlinedocs/5971-2383/5971-2383.html

HTH,
Jeff

Re: limit of size for a lvol vxfs

Jeff Schussele — Wed, 10 Dec 2003 11:59:29 GMT

OK - let me explain further.
Although the LV limit is 16TB, the filesystem & therefore file size limit IS 1TB for 11.0 & 2TB for 11.11 (11iv1).

Rgds,
Jeff

Re: limit of size for a lvol vxfs

Helen French — Wed, 10 Dec 2003 12:16:41 GMT

Jeff, I think you are right about the 2TB/1TB vxfs file system limitation on 11i/11.00 OS. 16TB is the theoratical value given on the man pages for LVs(lvcreate) and not proved on the Labs. The vxfs version 5 man pages (mkfs_vxfs) says it can support up to 32TB of file system size! But in practical, the version 5 (vxfs) supports only 4TB file system and 2TB file size max.

Man pages does create some confusion some times, but as I said in my original post, it's the *implementation limit* ! =))

Re: limit of size for a lvol vxfs

Fabio Ettore — Wed, 10 Dec 2003 12:23:38 GMT

Hi,

I think that Jeff is right!
The biggest size for a vxfs filesystem is 1 TB for 11.00 and 2 TB for 11.11 even if lvol can be 16 TB.
Also even if it is possible to get a bigger size it is not advisable because they could have unpredictable consequences.

Best regards,
Ettore

Re: limit of size for a lvol vxfs

Alberto Hurtado — Wed, 10 Dec 2003 12:46:27 GMT

wawww truely the level of expertize that you have is surprising.

I have a question about... i have a box of XP-256 and XP-512 with luns of 7,14,21 Gb, are there a limit of disk per logicalvolume ?

Re: limit of size for a lvol vxfs

Jeff Schussele — Wed, 10 Dec 2003 13:04:20 GMT

Hi (again) Alberto,

The limit is at the VG level & it's 255 physical volumes - that's either seperate disks or LUNs.
It's set at creation time with the -p parameter & if not supplied at creation time it defaults to 16.

Rgds,
Jeff

Re: limit of size for a lvol vxfs

Helen French — Wed, 10 Dec 2003 13:06:40 GMT

The implementation limitation of size of a LV is 16TB (theory) now. But since you can have only up to 1TB of file system (vxfs 3.X) or 4TB (vxfs 5, but you need to use Veritas Volume manager to create the LV and in 11i)), it's useless.

Did you mean disk size limitation in Volume group (67735 * 256 = 16TB)? Or Number of disk limitation disk in VG (255)? You can read all those information from here:
# man vgcreate
# man lvcreate

Re: limit of size for a lvol vxfs

Alberto Hurtado — Wed, 10 Dec 2003 13:42:26 GMT

you are very nice
Thanks Jeff
Thanks Shijtsu