| From: | The Hermit Hacker <scrappy(at)hub(dot)org> |
|---|---|
| To: | Michal Mosiewicz <mimo(at)interdata(dot)com(dot)pl> |
| Cc: | hackers(at)postgreSQL(dot)org |
| Subject: | Re: [HACKERS] fsync -> fdatasync in backend/storage/file/fd.c |
| Date: | 1998-04-17 02:24:08 |
| Message-ID: | Pine.BSF.3.96.980416232339.333S-100000@thelab.hub.org |
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| Thread: | |
| Lists: | pgsql-hackers |
On Fri, 17 Apr 1998, Michal Mosiewicz wrote:
> The Hermit Hacker wrote:
>
> > We don't have it (FreeBSD)...what does it do? *raised eyebrow*
> > And, how many ppl actually have fsync's enabled?
>
> When you fsync a file it usually costs at least two write operations,
> one to write the data and one to update modification/access date, etc.
> fdatasync synces only data area of the file without it's
> metainformation.
Similar to us (FreeBSD) mounting our file systems 'noatime', so,
ya, we have it...
Marc G. Fournier
Systems Administrator @ hub.org
primary: scrappy(at)hub(dot)org secondary: scrappy(at){freebsd|postgresql}.org
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