Speeding inode access

I have an unusual application which modifies multi-MB parts of large
files and requires atime enabled for audit info. I am currently using
ext4 with the journal on SSD. The data io spread over the array members
nicely, but the inode io doesn't. Any thoughts on getting the inodes
inode io faster?

My thought is to create a raid0 with a small chunk size over multiple
drives, the existing raid6 with a large chunk size, and then concatenate
them so the inodes are at the start in the fast portion. I can increase
the number of inodes to take up the whole "fast" part and keep data in
the large chunk portion. I am not crazy about using some brand-new type
-f file system, but I'll listen to suggestions.

--
Bill Davidsen
We are not out of the woods yet, but we know the direction and have
taken the first step. The steps are many, but finite in number, and if
we persevere we will reach our destination. -me, 2010



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