Re: Interactive responsiveness under heavy I/O load

At 23:43 Uhr +0100 26.1.2004, Johnny Billquist wrote:
>>    Softdep is such a huge performance win, especially for tasks like
>>    extracting a pkgsrc tree, because lots of metadata writes update
>>    the same disk block repetitively (think about adding files one at a
>>    time to the same directory). With softdep, each of these updates is
>>    done in memory (without the sync disk wait) and the resulting final
>>    directory blocks written to disk (again, speaking very broadly).
>
>softdep:s really sounds nice, but last I tried it (a few months ago) it
>still crashed my VAX very predictably, so I'd guess it still isn't good
>enough to turn on for people in general.

Same here on a SparcStation 10. Both with current and 1.6 kernels, softdep
mounts make sure the box locks up during the next /etc/daily run.

	hauke

--
/~\  The ASCII Ribbon Campaign
\ /    No HTML/RTF in email
 X     No Word docs in email
/ \  Respect for open standards