Hi Tobias,
This is the "pseudo" RAID controller that comes by default with most
Dell, low cost HP servers and probably others?
If you depend on I/O I would recommend you to change this raid with
PERC6/i (looks like this is Dell server)
which is little more expensive, but comes with 256MB battery backed
cache.
In my experience mpt devices are crap, and their performance is worse
then software mirror.
PERC6/i is something totally different :) It's again LSI product
branded from Dell and it works with mfi driver.
The only problem in the past with them was the management utility
which was linux binary, but today there is
official native tool in ports, and in 8.0 in base install there will
be a tool to manage your controller.
Well this wasn't that big problem compared to mpt which cannot be
managed under FreeBSD at all?
On Sep 9, 2009, at 10:59 PM, Tobias Lott wrote:
On Wed, 9 Sep 2009 21:30:22 +0200
Tobias Lott <tl...@gamesnet.de> wrote:
On Wed, 9 Sep 2009 07:02:13 -1000
Clifton Royston <clift...@lava.net> wrote:
On Wed, Sep 09, 2009 at 10:48:07AM +0200, Tobias Lott wrote:
On Tue, 8 Sep 2009 12:19:45 +0200
Tobias Lott <tl...@gamesnet.de> wrote:
Hey Everyone,
I upgraded a Dual Core Machine to 7.2-Stable (2 Days ago), all
OS related Stuff is located on an UFS Slice, Application is on
a ZFS Volume.
After the Upgrade everything seemed fine, but a User noticed one
PHP Script which is basically loading a plain Textfile into
Mysql times out. PHP Timeout was set to 60 secs, that was more
then enough just one day before the upgrade.
...
Since I upgraded the Machines zpool to version 13 already I
don't really wanna go back to 7.0, but it seems the only way
out atm.
Hopefully someone can give me a Hint where maybe I forgot to
check.
Somehow it feels like the last Versions, I'd say starting with
7.x doesn't really feel that Rock-Stable as Versions Prior used
to be. Prolly cause I'm using an Experimental Feature like ZFS,
so no Offense nor Blame and this is not intended as a Flame or
whatsoever! So don't get me wrong, I always liked, used,
recommended FreeBSD since 4.0 and will continue to do so!
Best Regards
I've tested some more it seems the Bottleneck is the HD, Raid
Array is Optimal checked it.
Probably you already checked this, but did you go through the
dmesg output relating to ata and drive detection closely?
In the past from time to time I've had machines suddenly start
crawling after an upgrade, and it turned out it was because some
change in the driver detection caused the ata to fall back to pio
mode. The symptoms are pretty much like you describe - all HD IO
takes forever.
-- Clifton
Thanks for that Hint, checked again to be sure, but thats not the
Case.
mpt0:vol0(mpt0:0:0): Settings ( Hot-Plug-Spares High-Priority-
ReSync )
mpt0:vol0(mpt0:0:0): Using Spare Pool: 0
mpt0:vol0(mpt0:0:0): 2 Members:
(mpt0:1:32:0): Primary Online
(mpt0:1:1:0): Secondary Online
mpt0:vol0(mpt0:0:0): RAID-1 - Optimal
mpt0:vol0(mpt0:0:0): Status ( Enabled )
(mpt0:vol0:1): Physical (mpt0:0:1:0), Pass-thru (mpt0:1:0:0)
(mpt0:vol0:1): Online
(mpt0:vol0:0): Physical (mpt0:0:32:0), Pass-thru (mpt0:1:1:0)
(mpt0:vol0:0): Online
acd0: CDROM <HL-DT-ST GCR-8240N/1.10> at ata0-master UDMA33
acd1: CDROM <VIRTUALCDROM DRIVE/> at ata2-slave PIO3
da0 at mpt0 bus 0 target 0 lun 0
da0: <Dell VIRTUAL DISK 1028> Fixed Direct Access SCSI-5 device
da0: 300.000MB/s transfers
da0: Command Queueing Enabled
SdMaP0:: A1P5 1C6P3U4 M#B1 (L3a1u0n5c4h6e4d3!2
512 byte sectors: 255H 63S/T 19330C)
Oh well just did some more research and found:
http://www.mail-archive.com/freebsd-performa...@freebsd.org/msg02461.html
Gonna try it out later and gonna give a Report.
--
Tobias Lott
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--
Best Wishes,
Stefan Lambrev
ICQ# 24134177
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