lkml.org 
[lkml]   [2006]   [Dec]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Linux disk performance.
On 12/18/06, Arjan van de Ven <arjan@infradead.org> wrote:
> if you want truely really smooth writes you'll have to work for it,
> since "bumpy" writes tend to be better for performance so naturally the
> kernel will favor those.
>
> to get smooth writes you'll need to do a threaded setup where you do an
> msync/fdatasync/sync_file_range on a frequent-but-regular interval from
> a thread. Be aware that this is quite likely to give you lower maximum
> performance than the batching behavior though.
>

Thanks...

But isn't O_DIRECT supposed to bypass buffering in Kernel?
Doesn't it directly write to disk?
I tried to put fdatasync() at regular intervals but there was no
visible effect.

--
---------------------------------------------------------------
regards
Manish Regmi

---------------------------------------------------------------
UNIX without a C Compiler is like eating Spaghetti with your mouth
sewn shut. It just doesn't make sense.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-12-18 13:43    [W:0.067 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site