Re: fsync on large files

Stephen C. Tweedie (sct@redhat.com)
Mon, 15 Feb 1999 16:37:08 GMT


Hi,

On Mon, 15 Feb 1999 10:10:30 +1100 (EST), Damien Miller
<dmiller@ilogic.com.au> said:

> On Sat, 13 Feb 1999, Theodore Y. Ts'o wrote:
>> Hmm. That's an interesting problem. This is the first time someone's
>> called it to my attention that syslog was calling fsync() all the time,
>> and obviously this causes a problem if there's a lot of syslogging going
>> on and the log files are large.

> Pardon my ignorance, but is there any reason that syslog cannot open
> its logfiles with O_SYNC?

Good question, it would certainly help --- lots. Ultimately, though, we
really do need to be able to track all of the dirty data and metadata which
belongs to any given inode: our fsync is going to be pretty sucky until
we do.

--Stephen

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