Re: Very slow file write/create operations

[email protected] (Frank Wille) writes:

>That's what I would expect! The extreme delay is gone. I can even add a 
>sync and it's still factor 20:

># time cp -Rp /etc /root; time sync
>         0.05 real         0.00 user         0.04 sys
>         1.14 real         0.00 user         0.00 sys
># time rm -rf /root/etc; time sync
>         0.01 real         0.00 user         0.01 sys
>         0.26 real         0.00 user         0.00 sys

>This matches, or is even a little faster, than the old server.
>Thanks.


But you don't want to run '-o async', on a crash it likely
corrupts your filesystem.

RAID controllers (like cciss hardware) are usually pretty bad
on synchronous writes unless they do have a persistent write
cache (flash or RAM with battery).