Re: multiply files in one (was GNU/Linux stance by Richard Stallman)
root (reiser@ceic.com)
Mon, 14 Jun 1999 12:42:15 +0000 (/etc/localtime)
Larry McVoy writes:
> : What I was getting at
> : was that if you pack the data together, then read-ahead will yield
> : more complete files, which translates to less transactions in the end.
>
> Read ahead really doesn't solve the problem for two reasons:
>
> 1) the allocation policies in almost all file systems is file
> centric - it's careful to get *a* file contiguous but isn't
> careful to get multiple files in the same directory all next
> to each other
1) is solved in reiserfs.
>
> 2) even if (1) was solved, the file system needs to know that it
> bring in more data. If the file it is reading is 1K long,
> why should it brin in the next 5MB of data?
I don't understand. How does this differ from any other sort of
read-ahead?
Hans
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