Roundtable May 2005

roundtable@muug.ca

11 participants
13 discussions

Raid benchmarks. Hardware vs. Software
by John Lange 10 May '05

10 May '05

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

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MUUG Meeting, May 10, 7:30pm -- The Xen Hypervisor
by gedetil＠cs.umanitoba.ca 03 May '05

03 May '05

[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

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Envelope Printing under Linux
by John Lange 03 May '05

03 May '05

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

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Roundtable May 2005