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Re: Guaranteed datarate (Was: Re: does it work on 2.4.4)
- To: "SCHOENWETTER,SEBASTIAN (HP-Belgium,ex1)" <sebastian_schoenwetter@hp.com>
- Subject: Re: Guaranteed datarate (Was: Re: does it work on 2.4.4)
- From: "Marcelo E. Magallon" <marcelo.magallon@bigfoot.com>
- Date: Sat, 2 Jun 2001 13:36:35 +0200
- Cc: "'Austin Gonyou'" <austin@coremetrics.com>, Rahul Jain <rahul@rice.edu>, linux-xfs@oss.sgi.com
- In-reply-to: <FD93D5954435D411BBDB00D0B747A8C1028DE11F@herge.belgium.hp.com>
- Mail-followup-to: "SCHOENWETTER,SEBASTIAN (HP-Belgium,ex1)" <sebastian_schoenwetter@hp.com>,'Austin Gonyou' <austin@coremetrics.com>,Rahul Jain <rahul@rice.edu>, linux-xfs@oss.sgi.com
- Sender: owner-linux-xfs@oss.sgi.com
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>> "SCHOENWETTER,SEBASTIAN (HP-Belgium,ex1)" <sebastian_schoenwetter@hp.com> writes:
> But is that due to a good CPU which is able to handle all those
> tasks, good scsi setup, ... ?
That's likely. Guaranteed rate I/O (GRIO) works only with XFS
filesystems (this is true on IRIX) and not on Linux.
Just to clarify: Someone asked why the XFS patch is so large. I just
said the XFS patch also includes some GRIO stuff. I didn't mean to say
that the feature is implemented on Linux (in fact, it's not, if you use
the corresponding ioctl it will return ENOSYS). Remember that XFS is
not Linux specific, and it'd be a nightmare to maintain two completely
different source trees, one for Linux and one for IRIX.
--
Marcelo