On 8/29/06, Ow Mun Heng <[EMAIL PROTECTED]> wrote:
On Tue, 2006-08-29 at 18:35 -0700, Richard Fish wrote:
> On 8/29/06, Ow Mun Heng <[EMAIL PROTECTED]> wrote:
> > $ mount | grep xfs
> > /dev/hda6 on /home type xfs (rw)
>
> Hmm, I missed this before. "nobarrier" should be showing up here. Try:
>
> mount /home -o remount,nobarrier
>
I did mention that I tried that as well. (but I just re-tried it anyway)
and it didn't have any changes.
I don't think it's a good idea. Do you know what the write barriers
provide? They give you a much higher chance of no damage if you are
able ot run with barriers. The only real danger to an XFS partition
is out-of-order commits (and of course massive hardware failure).
Write barriers prevent out-of-order journal vs. FS commits, and that
is a Good Thing(tm).
They are only in as of 2.6.17 for XFS.
Out of curiousity, I just tried to copy a file using an xterm (instead
of using nautilus) from DIsk 2 to disk1
disk2/partition2 - VFAT
disk1/partition6 - XFS partition (/home)
$ ls -lah WinXP-000001-cl1-000001-cl1-000001-s002.vmdk
-rwxrwxrwx 1 root root 620M Aug 29 19:10
WinXP-000001-cl1-000001-cl1-000001-s002.vmdk
$ time cp WinXP-000001-cl1-000001-cl1-000001-s001.vmdk ~/Desktop/
real 0m37.353s
user 0m0.157s
sys 0m5.445s
Transfer rate ~16.8MB/s
I read an article recently (<2 years ago , heh) about how Nautilus,
mc, Cp and other OSS copy utilities suffer from a lack of real
intuitive optimization work. They highlighted the GNU cp command.
Overall copying with Linux tends to be lack luster. It's services we
do well. i.e. Http, SQL, etc. So, that begs the question: Are there
any good, well optimized file copy utilities for Linux?
Using Nautilus (I don't know of a good way to measure throughput using
this, so it's basically what I see in the progress bar
~5min
gkrellm2 notes transfer rate ~2.0MB/s
However, doing the same thing to my /tmp directory (ext3 partition) the
same file copies in ~30secs and w/ ~17MB/s transfer rate.
What gives??
BTW, what's the difference between mc and mc-mp??
* app-misc/mc
Latest version available: 4.6.1
Latest version installed: [ Not Installed ]
Size of downloaded files: 11,606 kB
Homepage: http://www.ibiblio.org/mc/
Description: GNU Midnight Commander cli-based file manager
License: GPL-2
* app-misc/mc-mp [ Masked ]
Latest version available: 4.1.40_pre9
Latest version installed: [ Not Installed ]
Size of downloaded files: 2,904 kB
Homepage: http://mc.linuxinside.com/cgi-bin/dir.cgi
Description: GNU Midnight Commander cli-based file manager. 4.1.x
branch
License: GPL-2
From the URL:
"The goal of this project is creating a stable, well-working, usefull
console-only version of well-known Midnight Commander, without bugs
and garbage, like tk, xv and gnome. I'm bored waiting for bugfixes,
and A'rpi's ESP team stops their work in this direction too, so I did
it. I'm fixing all (found) bugs, reported by my friends, and made some
really pleasent new features, like real-time clock, or filegroups
colorizing."
Basically, this guy is sane, (thank God), and doing what MC really
needs: SIMPLICITY. I have never bitched at the mc guys, but when I
get to my desk, I am converting to mc-mp. Cause MC sucks recently.
--
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