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Re: when does journal flush with data=journal



Hi,

On Fri, Feb 08, 2002 at 04:33:38PM -0500, Theodore Tso wrote:
> On Fri, Feb 08, 2002 at 12:59:50PM -0800, Andrew Morton wrote:
> > The other (complimentary) option is to simply hack mke2fs so that it permits
> > larger journals.  In e2fsprogs's misc/util.c:figure_journal_size():
> 
> Note though that interactivity may suffer with larger journals; when
> it finally *does* come time to flush the journal, the system may
> become very non-responsive until the journal is actually completely
> flushed.

Andrew has patches to mitigate that somewhat by providing latency
guarantees separately for reads and writes.

--Stephen





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