Re: [PATCH] Clustering indirect blocks in Ext3

Bodo Eggert
2008-01-11T14:14:53Z

Abhishek Rai <abhishekrai@google.com> wrote:

> Putting metacluster at the end of the block group gives slightly
> inferior sequential read throughput compared to putting it in the
> beginning or the middle, but the difference is very tiny and exists
> only for large files that span multiple block groups.

Just an idea:

What about putting it into the end of the previous block group (except for
the first group, off cause) and starting to read the block group a little
earlier (readahead/~before)? I imagine it might be about as good as placing
it at the beginning while avoiding the fragmentation.