specify the stripe LVM during cold installation

[emily_3]

Is it possible to specify the stripe LVM during cold installation by using the configuration file. If could what's the format to specify the stripe LVM in the configuration file?

[Frederic Sevestre]

Hi,

Do you mean you want to strippe the lv on vg00 ?

Fr??d??ric

[David_246]

Hi Emily,

There is no support for striping vg00.
Sorry, you'dd better not try it.

This I thought because of the direct load of /stand/vmunix outside of LVM.

Best Regs David

[emily_3]

My server only have 2 harddisk, so is it possible to creat a stripe LVM.
My thinking is I have to specify lovl1, lovl2,lvol3 in vg00 in the root disk, and these couldn't be stripe LVM. So could I join the 2th. harddisk to vg00, and specify the other LVM to be stripe LVM? Can part of LVM is stripe, and part of LVM is not stripe under the same VG?

[Frederic Sevestre]

Hi,

You should not strippe the vg00.
The best thing to do is to use the second disk to mirror the vg00.

Create the vg00 on the first disk, then :

#pvcreate -B /dev/rdsk/cxtydz (your second disk)
#mkboot /dev/rdsk/cxtydz
#mkboot -a "hpux -lq" /dev/rdsk/cxtydz
#vgextend vg00 /dev/dsk/cxtydz

then for each lv of vg00 :
# lvextend -m 1 /dev/vg00/lvolx /dev/dsk/cxtydz

Regards,
Fr??d??ric

[emily_3]

Actually this server is our Ignite (IUX) server, the purpose i want to creat some stripe LVM is to speed the s/w loading by seperating the s/w depot in different harddisk.
So is there any better way to do this?

[Frederic Sevestre]

I am not sure that stripping your lv will increase performance.

Regards,
Fr??d??ric

[Karthik S S]

Hi,

Striping is required only when,
a. You need better read and write performance
b. Data is not critical

Since you want to improve the performance of IUX server, I think mirror disk alone can do the trick. Because, IUX server is read intensive. Network clients boot from the IUX server and read the install image to install the OS and is not write intensive. Hence, You can plan for Mirroring the Disk. Mirrordisk UX comes built-in with HP-UX 11.11 Mission Critical OE.

Regards,
Karthik S S

[Frederic Sevestre]

You can create all vg00 logicals volumes on your first disk exept the depot's one. Then create the lv for the depot on the other disk :

Create vg00 and all lv on first disk.

# lvcreate lv_depot vg00
# lvextend -L /dev/vg00/lv_depot /dev/dsk/cxtydz (the second disk)
# newfs -F vxfs /dev/vg00/rlv_depot
Now the lv_depot is on the second disk.

Regards,
Fr??d??ric

[emily_3]

hi techssk,

My understanding is since the IUX server is read intensive, so stripping should be able to have better performance. Why have to be both read and write intensive?
if my understanding is wrong, please correct me?