topic Re: inod question in Operating System - HP-UX

inod question

Juan Gonzalez_2 — Thu, 31 Oct 2002 18:16:07 GMT

I have a server that has 30,000 inodes max configure and a file system that uses 5,000 inodes. I split the bc of that filesystem and mount that filesystem to another server that has 4,000 inodes configured will this cause me a problem backing up the filesystem because I do not have enough inodes.

Re: inod question

James R. Ferguson — Thu, 31 Oct 2002 18:22:00 GMT

Hi:

If the filesystem is a VxFS one then inode allocation is dynamic. If you need more inodes, expand the filesystem.

Regards!

...JRF...

Re: inod question

John Palmer — Thu, 31 Oct 2002 19:27:22 GMT

If you're worried about the kernel parameter 'ninode', don't.

'ninode' only defines the size of a cache of recently used inodes that the kernel uses. It doesn't restrict the number that the kernel can handle.

Regards,
John

Re: inod question

A. Clay Stephenson — Thu, 31 Oct 2002 19:36:39 GMT

Note that ninode only applies to hfs filesystems. I'll bet that the only hfs filesystem on your box is /stand. If that is the case, you can drastically reduce niniode to a few hundred and save resources. Typically, the maximum number of inodes will be in play in building kernels in /stand and for that a few hunderd will more than suffice.

Re: inod question

Juan Gonzalez_2 — Thu, 31 Oct 2002 22:14:27 GMT

John then what kernel parameter can tell me how many inodes my server can handle and my file system is vxfs.

Re: inod question

A. Clay Stephenson — Thu, 31 Oct 2002 22:18:51 GMT

There is no such parameter for vxfs inodes; there is nothing to examine. The number of inodes needed for vxfs is increased as needed automatically. There is an obsolete tunable called vx_ninode but it is completely ignored. Again, if your only hfs filesystem is /stand then reduce niniode to something around 500 and forget about it.

Re: inod question

James R. Ferguson — Thu, 31 Oct 2002 22:33:07 GMT

Hi (again) Juan:

As we have noted, if the filesystem is VxFS then there is no inode limit.

Are you by any chance thinking of the maximum number of sub-directories of a directory?

If so, there is a tunable 'vx_maxlink' which allows this limit to reach 64K-1 (PHKL_27648).

Regards!

...JRF...

Re: inod question

Juan Gonzalez_2 — Thu, 31 Oct 2002 23:44:41 GMT

Thanks everyone for your information and hope you all have a great Halloween.