lkml.org 
[lkml]   [1997]   [Mar]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Sharing SCSI disks
Date
Hi,

> > Couldn't you just write data and call sync?
>
> No. One of the reasons is that the sync does not propagate
> down. Devices with own caches have no way to get this information
> and use it to flush their caches.
>
> Additionally you don't always want all and everything flushed.
> Some pieces of data always need to be on disk, others can be written
> delayed or even out of order. Those are patterns that you can't
> implement without RAW devices.

An intelligent I/O system could still fuck up your software, ie. SCSI
disk set to "ulimited reorder" which is fine for filesystems but fatal
for some other things.

Ralf

\
 
 \ /
  Last update: 2005-03-22 13:39    [W:0.047 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site