I recently built a server with a hardware 3Ware 9500 RAID card. This is
the SATA version and it has 4 180G drives attached to it.
Once the machine was built I wanted to bench the RAID array just to make
sure everything was working and I thought I'd share the results here
just for interest.
For comparison I have results from a 4 drive SATA SOFTWARE RAID set and
my workstation.
Using bonnie++ v1.3a for benching.
Hardware RAID
-------------
Machine is a P4 3.2Ghz.with 2G of ram. (4 Disk SATA Hardware RAID 5)
Sequential Blocks Out: 53,282 K/sec
Sequential Blocks In: 146,837 K/sec
Software RAID
-------------
Machine is a P4 2.8Ghz.with 1G of ram. (4 Disk SATA Software RAID 5)
Sequential Blocks Out: 64,924 K/sec
Sequential Blocks In: 80,435 K/sec
Workstation (NON RAID ATA Drive)
--------------------------------
Machine is a Athalon 1.8Ghz.with 512K of ram.
Sequential Blocks Out: 22,081 K/sec
Sequential Blocks In: 27,434 K/sec
Noteworthy: During block reads and writes, neither the software or
hardware raid caused any significant CPU load (less than 10% in all
cases).
--
John Lange
President OpenIT ltd. www.Open-IT.ca (204) 885 0872
VoIP, Web services, Linux Consulting, Server Co-Location
[Posted to man.unix.general and other news groups]
------ Forwarded Article <d585va$gb7$1(a)canopus.cc.umanitoba.ca>
------ From gedetil(a)cs.umanitoba.ca (Gilbert E. Detillieux)
The Manitoba UNIX User Group (MUUG) will be holding its next monthly
meeting on Tuesday, May 10. The meeting topic for this month is
as follows:
The Xen Hypervisor
You may have heard about Virtual Machine Managers (VMMs) such as VMware
or Microsoft's Virtual PC, and now Xen. What are they? How do they work?
How do they differ from each other? And more importantly, what can they
do for you? Kevin McGregor will be shedding light on these topics at the
May 10th meeting.
The group holds its general meetings at 7:30pm on the second Tuesday of
every month from September to June. (There are no meetings in July and
August.) Meetings are open to the general public; you don't have to be a
MUUG member to attend.
**********************************************************************
Please note our meeting location: The IBM offices, at 400 Ellice Ave.
(between Edmonton and Kennedy). When you arrive, you will have to
sign in at the reception desk, and then wait for someone to take you
(in groups) to the meeting room. Please try to arrive by about 7:15pm,
so the meeting can start promptly at 7:30pm. Don't be late, or you may
not get in. (But don't come too early either, since security may not
be there to let you in before 7:15 or so.)
Limited parking is available for free on the street, or in a lot
across Ellice from IBM, for $1.00 for the evening. Indoor parking is
also available nearby, at Portage Place, for $2.00 for the evening.
**********************************************************************
For more information about MUUG, and its monthly meetings, check out their
Web server:
http://www.muug.mb.ca/
Also note that MUUG maintains two mailing lists, called "muug-announce"
and "roundtable". If you're not already on these lists, we encourage you
to subscribe now:
http://www.muug.mb.ca/mailman/listinfo/
The "muug-announce" list is used for monthly meeting announcements (such
as this one) as well as other important announcements of interest to MUUG
members.
The "rountable" list is meant to be a forum for follow-ups to topics
discussed at the meetings, or for round-table-style discussion on other
topics that come up between meetings. Of course, for this to be effective,
we need to reach a certain critical mass. So, please subscribe, and stay
involved!
--
Gilbert E. Detillieux E-mail: <gedetil(a)muug.mb.ca>
Manitoba UNIX User Group Web: http://www.muug.mb.ca/
P.O. Box 130, St-Boniface Phone: (204)474-8161
Winnipeg, MB, CANADA R2H 3B4 Fax: (204)474-7609
------ End of Forwarded Article
One of the things that still manages to frustrate me on a regular basis
is printing under Linux.
I have notice some dramatic improvements recently, especially with HP
now releasing their own Linux drivers for all of their printers and KDE
& CUPS focusing on bringing it all together.
But I still run into problems from time to time.
Today, I think I have run the same envelope through by 2 HP printers at
least 40 times to no avail. I simply can not get an envelope to print.
Printers I've tried are:
HP Photosmart 7760
HP Deskjet 830C
Tried printing from OpenOffice 1.1.4 and kGhostscript.
In OpenOffice I did "Insert >> Envelope" and entered the information and
it makes a nice envelope on screen. Great, now if I could only mail my
monitor everything would be wonderful.
On the other hand, when I print it the printer stops saying "Paper too
small". If I put in a sheet of 8.5x11 it prints it fine and in the
proper orientation.
I have tried every conceivable combination of settings in OO and the
printer settings themselves. Paper is set to DL, landscape/portrait
everything I could think of but it always does the same thing.
Finally I tried exporting it to a PDF and printing that but got the
exact same results.
No matter what I do it will not print the envelope. It seems the
printers are expecting the paper to be full size which leads me to
believe the settings are not being passed from the software to the
printer...
If there is some magic to this please let me know.
P.S. I used to have an HP Laser 4MP which has Postscript built in and it
was the only thing that I ever got to print an envelope under Linux.
Regards,
--
John Lange
President OpenIT ltd. www.Open-IT.ca (204) 885 0872
VoIP, Web services, Linux Consulting, Server Co-Location
