NFS maximum file system size?

[A. Daniel King_1]

Hi, folks...

Mounting from HP-UX 11.0 to HP-UX 11.0, what is the maximum file system size? Is this limited by the real file system size, or are there other limits? I'm using JFS 3.3...

Thanks in advance.

[James R. Ferguson]

Hi Daniel:

You'll find your answer(s) here:

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

Regards!

...JRF...

[S.K. Chan]

It depends on your FS layout version (2,3 or 4) for JFS 3.3. For 11.0 the maximum FS size is 128GB for version2 and 1TB for version3&4.

[V. V. Ravi Kumar_1]

hi,

i don't think that is there any limit, it is the same ur OS limitation for a file system. once a file system is created without any problem u can export it.

regds

[James R. Ferguson]

Hi (again) Daniel:

Sorry, I passed right over the specific mention of NFS. You need NFS3 along with 'largefiles' enabled (of course). JFS versions 3x support this. I don't believe that any other requirements exist.

Regards!

...JRF...

[A. Daniel King_1]

Thanks for the replies.

My question relates specifically to large _file_systems_. Is there any NFS-specific limitation to exporting or mounting very large _file_systems_?

BTW: 11.0 supports file systems much larger than 128GB. I'm looking at several now. 128GB is the HFS limit. I am on JFS.

[A. Daniel King_1]

How do you tell which layout version you're using under JFS 3.3?

[James R. Ferguson]

Hi:

# fstyp -v /dev/vgXX/lvolX

...will return the layout version.

Regards!

...JRF...

[A. Daniel King_1]

How about:

version: 3

for the layout...

[James R. Ferguson]

Hi (again):

I did a bit more digging. On HP-UX 11.1x, the default is Version 4. On HP-UX 11.0 systems, the default is Version 3. You can choose
the disk layout version with the 'version=n' option when you 'mkfs'.

One problem, however, is distinguishing betweem JFS 3.1 and 3.3 which on 11.0 systems show a version layout of <3>.

To distinguish, look at /stand/system:

'vxbase' & 'vxadv' signify JFS 3.0 or JFS 3.1 drivers.

'vxfs' & 'vxportal' signify JFS 3.3 drivers.

Regards!

...JRF...

[Michael Lampi · Accepted solution]

The largest NFS file system size that can be mounted under HP-UX 10.x or 11.x is not an issue. The directory structure is only partially cached on the client side, and cached as necessary on the file server side. Since the file server is where the file system actually exists, whatever limitations that file server has for file system sizes is the limit for the NFS volumes that it can export.

So, what is the problem you are running into?

[A. Daniel King_1]

No problem ... yet. I'd like to avoid having one. So, I ask.

I also wonder, are there limits as to how many nfs file systems can be mounted?

[Fragon]

Hi Daniel, do you mean maximum file system types or maximum export points one time?

ux

[A. Daniel King_1]

Maximum export/mount points. Sorry if this was unclear.