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Re: [HACKERS] fsync method checking

From: Manfred Spraul <manfred(at)colorfullife(dot)com>
To: markw(at)osdl(dot)org
Cc: tgl(at)sss(dot)pgh(dot)pa(dot)us, josh(at)agliodbs(dot)com, Q(at)ping(dot)be,pgman(at)candle(dot)pha(dot)pa(dot)us, markir(at)paradise(dot)net(dot)nz,pgsql-performance(at)postgresql(dot)org, pgsql-hackers(at)postgresql(dot)org
Subject: Re: [HACKERS] fsync method checking
Date: 2004-03-26 06:25:53
Message-ID: 4063CCF1.2030307@colorfullife.com (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-performance
markw(at)osdl(dot)org wrote:

>Compare file sync methods with one 8k write:
>        (o_dsync unavailable)  
>        open o_sync, write       6.270724
>        write, fdatasync        13.275225
>        write, fsync,           13.359847
>  
>
Odd. Which filesystem, which kernel? It seems fdatasync is broken and 
syncs the inode, too.

--
    Manfred


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