We gave Neil Brown's patch a try, it is about three times faster than the stuff in the
kernel. It
avoids the unnecessary parity writes I first complained about when writing 50mb files,
and we are
going to document for reiserfs users that they should be using his patch.
Hans
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Neil Brown wrote:
On Monday November 27, [EMAIL PROTECTED] wrote:
using reiserfs over raid5 with 5 disks. This is unnecessarily suboptimal, it
should be that parity
writes are 20% of the disk bandwidth. Comments?
Is there a known reason why reiserfs over raid5 is way worse than
On Tue, Nov 28, 2000 at 11:46:10AM -0700, Hans Reiser wrote:
We need vm to push the FS which pushes raid, [..]
This just happens.
[..] and the FS needs to know about
or even contain the stripe cache.
That's not a blkdev layer issue but a FS-LVM/RAID issue.
What's suboptimal at the moment
On Tuesday November 28, [EMAIL PROTECTED] wrote:
On Tue, Nov 28, 2000 at 10:50:06AM +1100, Neil Brown wrote:
However, there is only one "unplug-all-devices"(*) call in the API
that a reader or write can make. It is not possible to unplug a
particular device, or better still, to
On Mon, Nov 27, 2000 at 02:24:03PM -0700, Hans Reiser wrote:
using reiserfs over raid5 with 5 disks. This is unnecessarily suboptimal, it should
be that parity
writes are 20% of the disk bandwidth. Comments?
It would be great to have a number describing ``unnecessarily suboptimal''
more
Jakob Østergaard ([EMAIL PROTECTED]) wrote on 27 November 2000 18:18:
On Mon, Nov 27, 2000 at 02:24:03PM -0700, Hans Reiser wrote:
using reiserfs over raid5 with 5 disks. This is unnecessarily
suboptimal, it should be that parity writes are 20% of the disk
bandwidth. Comments?
It would
On Mon, Nov 27, 2000 at 04:58:12PM -0200, Carlos Carvalho wrote:
Jakob Østergaard ([EMAIL PROTECTED]) wrote on 27 November 2000 18:18:
On Mon, Nov 27, 2000 at 02:24:03PM -0700, Hans Reiser wrote:
using reiserfs over raid5 with 5 disks. This is unnecessarily
suboptimal, it should be that
Hans Reiser [EMAIL PROTECTED] writes:
using reiserfs over raid5 with 5 disks. This is unnecessarily
suboptimal, it should be that parity writes are 20% of the disk
bandwidth. Comments?
Is there a known reason why reiserfs over raid5 is way worse than
ext2. Does ext2 optimize for