On Sat, 2007-04-07 at 22:30 +0300, Timo Sirainen wrote:
> I just figured out that O_APPEND is pretty great. If the operating
> system updates seek position after writing to a file opened with
> O_APPEND, writes to Dovecot's transaction log file can be made
> lockless.
Well, almost. Log rotat
On 8.4.2007, at 12.41, Miquel van Smoorenburg wrote:
On Sat, 2007-04-07 at 22:30 +0300, Timo Sirainen wrote:
Although Dovecot is already read-lockless and it uses only short-
lived write locks, it's be really nice to just get rid of the locking
completely. :)
I just figured out that O_APPEND i
On Sat, 2007-04-07 at 22:30 +0300, Timo Sirainen wrote:
> Although Dovecot is already read-lockless and it uses only short-
> lived write locks, it's be really nice to just get rid of the locking
> completely. :)
>
> I just figured out that O_APPEND is pretty great. If the operating
> system
Timo Sirainen wrote:
Although Dovecot is already read-lockless and it uses only short-lived
write locks, it's be really nice to just get rid of the locking
completely. :)
I just figured out that O_APPEND is pretty great. If the operating
system updates seek position after writing to a file op
Hi Timo,
> OS X. Could you BSD people try if it works there? http://dovecot.org/
> tmp/append.c and see if it says "offset = 0" (bad) or non-zero (yay).
FreeBSD 6.2: offset = 5
FreeBSD 4.10: offset = 5
FreeBSD 4.7: offset = 5
NetBSD 3.0.1: offset = 5
Cor
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Timo Sirainen wrote on 7-4-2007 21:30:
> Could you BSD people try if it works there?
> http://dovecot.org/tmp/append.c and see if it says "offset = 0"
> (bad) or non-zero (yay). The O_APPEND at least doesn't work with
> NFS, so it'll have to be option
Timo Sirainen wrote:
I see that this works with Linux and Solaris, but not with OS X. Could
you BSD people try if it works there? http://dovecot.org/tmp/append.c
and see if it says "offset = 0" (bad) or non-zero (yay).
OpenBSD 3.9 and 4.0 (i386) both give me 5, 10, 15 and so on, so yay!
/Joha
On Sat, Apr 07, 2007 at 10:30:25PM +0300, Timo Sirainen wrote:
>
> I just figured out that O_APPEND is pretty great. If the operating
> system updates seek position after writing to a file opened with
> O_APPEND, writes to Dovecot's transaction log file can be made
> lockless. I see that thi
On Apr 7, 2007, at 12:30, Timo Sirainen wrote:
Although Dovecot is already read-lockless and it uses only short-
lived write locks, it's be really nice to just get rid of the
locking completely. :)
I just figured out that O_APPEND is pretty great. If the operating
system updates seek posi
Although Dovecot is already read-lockless and it uses only short-
lived write locks, it's be really nice to just get rid of the locking
completely. :)
I just figured out that O_APPEND is pretty great. If the operating
system updates seek position after writing to a file opened with
O_APPEN
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