size of root volume filesystems

[khilari]

Hi guys, i wanted to ask that wheni am deploying a new system what should be the size of vg00 filesystems. Lets say i have a 36.5 gb hard drive. Then how much should be stand, opt etc etc.
Thanks

[Tim Nelson]

Different requirements for different OS versions.

Which one ?

11iv1
11iv2
or 11iv3 ?

[khilari]

for 11 vi and 11 v2
thanks

[Fabian Briseño]

Hello Khilari.
Im my opinion it really depends on your needs.

in my case I tend to give root and other filesystems I little more space that the default sizes.

for example var I tend to make it bigger in order to capture a crash dump.

[Fabian Briseño]

I forgot to mention I use HPUX 11.11

[James R. Ferguson]

Hi:

This depends entirely on the release (11.11, 11.23 11,31) AND on the Operating Environment you are installing AND on what additional products you intend to install. Remember that things like the compilers, (C, C++), Perl, 'glance', etc. and add-ons from Internet Express will be installed in '/opt'.

For a general guideline see the installation documentation; e.g. Table 2-1:

http://docs.hp.com/en/5991-8010/ch02s02.html

Regards!

...JRF...

[khilari]

can u like give me a breakdown,
like 5 gb to stand
4 to opt
etc etc
thanks

[Tim Nelson]

For HPUX 11iv2

/ 420MB
/stand 300MB
/var 4GB
/usr 6GB
/opt 4GB
/home pick your size
/tmp pick your size

These are a little oversized to accomodate for future patches and HPUX tools.

[James R. Ferguson]

Hi (again) Khilari:

I would add two or three other comments.

First, aside from the initial choices you make, you "of course" have OnlineJFS licensed on your servers! Hence, you can easily expand your filesystems without unmounting them should you need to do so.

Second, do *not* be tempted to add any non-vg00 logical volumes to your vg00 just because you have free space thereon. Your vg00 is best left for *only* the standard HP-UX logical volumes. Keeping vg00 devoid of any application data facilates Ignite recovery, cloning, operating system upgrades and hardware migration.

Lastly, configure a reasonable but small primary swap space. It is advisable to enable pseudoswap with 'swapmem_on' and then if you need additional device swap, create a non-vg00 seconardy swap device. You don't need to use the last free extents you have for swap. Keep a few in reserve should you need to expand a logical volume and its filesystem.

Regards!

...JRF...

[Raj D.]

Khilari,

Now itanium systems comes with 72GB Disk, so you will have enough freedom to use a good amount of space for the vg00 filesystems.

ex:

/stand 760MB
swap 16GB
/ 2GB
/home 2GB
/tmp 2GB
/usr 10GB
/opt 16GB
/var 10GB
/var/adm/crash 10GB

Hope this helps,

Raj.

[whiteknight]

Khilari,

Check this out for 11iv3 requirement on partition.

http://docs.hp.com/en/5991-6460/ch02s01.html#babjiabd

WK
please assign points

[likid0]

Tim, on 11v2 i find 300 megs for /stand, to small, i first installed the boxes with 300 megs but now i am using 600 megs, because if you like to keep a couple of diferent kernel configs and also the allways present backup, they dont seem to fit, but it is just an opinion


cya

[VK2COT · Accepted solution]

Hello dear colleagues,

The question does not contain the most
important part: what is the size of RAM.

Anyway, let's say we have a 36 GB boot disk
and that RAM is 4 GB.

Here is my way, based on personal
experience and having in mind the
following:

1. Always separate dump from primary swap
(see my other postings why),

2. Plan to have multiple kernel
versions during the lifetime of the server,

3. Primary swap is always 4 GB or maximum
8 GB. I never support the design that sets
primary swaps to large values (for
performance and maintenance reasons),

4. Do not allow large home directories.
The application home directories should be on
SAN, NAS or some other storage - not n boot
disks, hence /home is relatively small
on purpose,

5. I also enforce that /tmp is cleaned up at boot time! I do not allow files hanging
in /tmp for years. It is not meant as
permanent depository area (which, unfortunately, I see at som many customers),

6. I like to rund figures to binary
formats as much as possible (multiples of 2), hence 512 MB, or 1024 MB, or 2048 MB,
and so on,

7. I assume you have access to SAN or NAS
for applications and other non O/S files.

8. The values below are in MegaBytes (MB).

HP-UX 11.31 (v3)
----------------------
/ 1024
primary swap 4096
dump 3072 (or 4096 to match RAM)
/stand 2048
/tmp 1024
/home 512
/usr 4096
/var 4096
/var/tmp 512
/var/adm/crash 3072 (or 4096 to match RAM)
/opt 2048

HP-UX 11.20 to 11.23 (v2)
-------------------------
/ 512
primary swap 4096
dump 3072 (or 4096 to match RAM)
/stand 1024
/tmp 1024
/home 512
/usr 4096
/var 4096
/var/tmp 512
/var/adm/crash 3072 (or 4096 to match RAM)
/opt 2048

HP-UX 11.11 (v1)
----------------------
/ 512
primary swap 4096
dump 3072 (or 4096 to match RAM)
/stand 512
/tmp 1024
/home 512
/usr 4096
/var 4096
/var/tmp 512
/var/adm/crash 3072 (or 4096 to match RAM)
/opt 2048

If you use OpenView for monitoring,
I also add two other small file systems:

/var/opt/perf 1024
/var/opt/OV 1024

You are welcome to ignore my advice -
maybe this does not work well in your environment :)

Cheers,

VK2COT

[Tim Nelson]

Dan, Good point.. I agree, If you are keeping more than current and last kernels then 300MB for /stand is not enough.