"(*) Sun's ZFS can even detect strided sequential access - ie reading X amount of data every Y kilobytes."
... and so can the NT cache manager since the very first Windows NT release ;-) It's good to see that people are finally adapting these features 15 years later. F. On Wed, Sep 17, 2008 at 10:17 AM, Roger Binns <[EMAIL PROTECTED]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Robert Simpson wrote: >> To me this seems like an obvious bug in Vista, > > Actually I'd argue that it is behaving as designed. Generally > filesystem code will try to detect what is going on under the hood. In > particular if it looks like you are doing sequential access(*) then they > will start doing read ahead, whereas read ahead is a waste for random > access. By using the sequential or random flags you are explicitly > telling the filesystem to ignore its heuristics and do as you say only. > > Since SQLite cannot tell in advance whether access is almost entirely > random or almost entirely sequential, it makes far more sense to let the > operating system use its builtin heuristics and optimise accordingly. > > (*) Sun's ZFS can even detect strided sequential access - ie reading X > amount of data every Y kilobytes. > > Roger > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.6 (GNU/Linux) > > iD8DBQFI0L0vmOOfHg372QQRAk+7AKCEloS0d+xB+M2C/Bap38ilZZ8tVACfciC4 > vMfbYMNVV9k6CNR7hpSQo6A= > =AXGU > -----END PGP SIGNATURE----- > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
