How and or do I ensure a system will not run out of inodes?

[Q A <qarce_mail_lists@xxxxxxxxx>]

Hello,

        I am not on the list so, please :-) reply to all so
that I may learn from you all.

I think I just saw an ext2 system run out of inodes. 
I have a large (about 280GB) system I will be bringing
on line soon with XFS.  It will be a source repository
system.  I know once the file system is built you can
not re-define the number of inodes.  For this reason,
the size of the system, and the large number of files
that will be created on this system I would like to
plan.

Is there a formula for determining the number of
inodes a system should have based on use, size, fs
type?

Thanks for all of your help,

Quentin Arce

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