Messages in this thread | | | From | root <> | Date | Mon, 14 Jun 1999 12:42:15 +0000 (/etc/localtime) | Subject | Re: multiply files in one (was GNU/Linux stance by Richard Stallman) |
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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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