hpux 11 large filesystem

[Gerrit_1]

Hi,

We're running HPUX11.00.
I want to create a big filesystem, lets say
4000GB.

The situation is this :

Volumegroup :
root/sv00276#vgdisplay vgcx300dass01
--- Volume groups ---
VG Name /dev/vgcx300dass01
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 1
Open LV 1
Max PV 16
Cur PV 6
Act PV 6
Max PE per PV 20000
VGDA 12
PE Size (Mbytes) 16
Total PE 98286
Alloc PE 65535
Free PE 32751
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

Filesystem:

root/sv00276#bdf /test_cx300/
Filesystem kbytes used avail %used Mounted on
/dev/vgcx300dass01/lv_test_cx300
1073725440 35160 1065302088 0% /test_cx300

When I want to increase this filesystem, I get the message :

“ The size entered exceeds the allowable limit that can be used with
this type of file system. The size has been rounded down to the
nearest multiple of 16 Mbytes (the physical extent size) that does
not exceed the limit. “


Can I find some official information about the
max size a filesystem can have?

Tx in advance
Points will be given :>

[Devender Khatana · Accepted solution]

Hi,

The official document attached.

HTH,
Devender

[Devender Khatana]

Hi,

It is also there on web at

http://docs.hp.com/en/5971-2383/5971-2383.pdf

The error reported was very correct and indicating the exact reason.

HTH,
Devender

[Raj D.]

Hi Gerrit ,

Which version of VxFS are you using , and the Filesystem size depends on the version of hp-ux and version of vxfs you are using.

hp-ux 11.00 with JFS3.1 , version 2 , supports filesystem size upto 128GB.

and

hp-ux 11.00 with JFS3.3, version3 & 4 , supports filesystem size upto 1000GB.



To check the vxfs filesystem version , you can execute

# fstyp -v /dev//vgcx300dass01/lv_test_cx300




hth,
Raj.

[Raj D.]

Hi Gerrit ,

Which version of VxFS are you using , and the Filesystem size depends on the version of hp-ux and version of vxfs you are using.

hp-ux 11.00 with JFS3.1 , version 2 , supports filesystem size upto 128GB.

and

hp-ux 11.00 with JFS3.3, version3 & 4 , supports filesystem size upto 1000GB.



To check the vxfs filesystem version , you can execute

# fstyp -v /dev/vgcx300dass01/lv_test_cx300




hth,
Raj.

[Steven E. Protter]

Shalom,

128 GB is the largest I've heard about. I'd wonder though what kind of performance you'd get there. You'd need very fast hardware and i/o to use one that big.

You can get more physical extents in a volume group with the vgcreate -p max_disks parameter. If you lower the maximum number of disks you get more usable extents on those actuallly present.

SEP

[Yogeeraj_1]

hi,

With Hp-UX 11iv2, HP supports large file systems that can be as big as 32 TB.

but with the version of hp-ux that you are running 11.00, with JFS 3.3 and disk layout Version 4 you can reach a maximum of 1 TB.


hope this helps too!

kind regards
yogeeraj

[Alzhy]

Peace be with thee Gerrit.

It is possible the filesystem you are trying to increase was descended from an earlier pre 11.0 environment. Default JFS/VxFS version for 11.0 is version 3 which allows filesystem sizes greater than 128GB (possibly 1TB).

Check your filesystem type via "fstyp -v /dev/vgname/lvolname". If the version is less than version 3 then the suspicion is possibly correct -- that the filesystem was created possibly in a pre-11.0 system.

Unfortunately - on 11.0 systems, the maximum size at JFS 3.3 is just 1TB at either VxFS layouts version 3 or 4.

And BTW, just to correct a misconception, the size of a filesystem is not really dependent on "fat/fast hardware". On my 11.0 dual cpu (440Mhz) machines -- it's normal for those machines to have Oracle mount points that are anywhere from 200 to 400GB and total filesystem size of over 1TB. On similar N-Class running 11i, it is fairly common to have filesystems (for my fileshares) that are greater than 1TB...

[James R. Ferguson]

Hi Gerrit:

All is not necessarily lost.

As Nelson suggests, your filesystem may have been created with a VxFS version whose size limitation has been met.

However, depending on the version of JFS that you have you may be able to update the filesystem version and thereafter grow the filesystem size:

http://docs.hp.com/en/B2355-60127/vxupgrade.1M.html

Regards!

...JRF...

[Alzhy]

If I am reading your requirement correct - you've a need for growth to a single 4TB filesystem - then no way you can have that on an 11.0 environment. Even with 11.11 and LVM - that will be a tall order.

Only way you can safely do that is with an 11.11+ environment with VxVM+VxFS 3.5.