Date: Thu, 25 Feb 1999 13:35:45 +1100 From: Peter Jeremy <peter.jeremy@auss2.alcatel.com.au> To: ken@plutotech.com Cc: hardware@FreeBSD.ORG, ru@ucb.crimea.ua Subject: Re: Tagged queueing and write cache on WDE SCSI drives Message-ID: <99Feb25.132452est.40323@border.alcanet.com.au>
next in thread | raw e-mail | index | archive | help
"Kenneth D. Merry" <ken@plutotech.com> wrote: >It may be single threaded, but since it goes through the filesystem, there >can be multiple outstanding I/O requests. That makes sense - the filesystem is doing write-behind so there can be lots of outstanding I/O requests. That said, since it is a sequential write, there isn't much scope for command re-ordering (the inode and bitmaps will be being updated, but fairly infrequently) - which is the whole point of tagged queueing. Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?99Feb25.132452est.40323>