Re: [Beowulf] IEEE 1588 (PTP) - a better cluster clock?

2007-07-19 Thread Beat Rubischon
Hello! Am 18.7.2007 17:35 Uhr schrieb "Patrick Ohly" unter <[EMAIL PROTECTED]>: > For clusters it's time to replace it with a solution that works better > in a LAN. > [2] http://ptpd.sourceforge.net/ It looks like an interesting tool which probably solves a lot of my troubles with inaccurate clo

Re: [Beowulf] MPI2007 out - strange pop2 results?

2007-07-19 Thread Kevin Ball
Hi Brian, The benchmark 121.pop2 is based on a code that was already important to QLogic customers before the SPEC MPI2007 suite was released (POP, Parallel Ocean Program), and we have done a fair amount of analysis trying to understand its performance characteristics. There are three things t

Re: [Beowulf] Sidebar: Vista Rant

2007-07-19 Thread jason bishop
On Jul 19, 2007, at 1:34 AM, Tim Cutts wrote: Those look like much the same caveats to me. At least later versions of Mac OS X supply the fcntl() methods to specifically ask the driver to commit (although how it can possibly guarantee that I don't know - the device could be a long way a

Re: [Beowulf] Sidebar: Vista Rant

2007-07-19 Thread andrew holway
I'd better ask the missus about this, As a radiographer she should have all the info about radiologists catching up with their favourite soaps whilst casually flicking thru your scans. On 19/07/07, Joe Landman <[EMAIL PROTECTED]> wrote: Jim Lux wrote: > (I do find humorous all the references

Re: [Beowulf] Sidebar: Vista Rant

2007-07-19 Thread Chris Samuel
On Thu, 19 Jul 2007, Tim Cutts wrote: > And this is different from Linux how? Because you are comparing two different system calls. fsync(2) under Linux says: fsync() transfers ("flushes") all modified in-core data of (i.e., modi‐ fied buffer cache pages for) the file referred to

Re: [Beowulf] Sidebar: Vista Rant

2007-07-19 Thread Joe Landman
Jim Lux wrote: (I do find humorous all the references to viewing medical imagery simultaneously with watching protected HD-DVD content. Yeah, that's what *I* want the radiologist on call doing.. watching a movie while he/she studies my CAT scan.) Look, I am getting scolded over my lack of

[Beowulf] Sidebar: Vista Rant

2007-07-19 Thread Peter St. John
Oops, RGB had posted that link (with the quote re "suicide note") way way back in this thread. Peter ___ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beo

Re: [Beowulf] Sidebar: Vista Rant

2007-07-19 Thread Gerry Creager
What you DON'T want is to know what else that radiologist is doing while interpreting your x-ray images! Peter St. John wrote: The critique with the line "The Vista Content Protection specification could very well constitute the longest suicide note in history" [Gutman, "A Cost Analysis of Wi

Re: [Beowulf] Sidebar: Vista Rant

2007-07-19 Thread Peter St. John
The critique with the line "The Vista Content Protection specification could very well constitute the longest suicide note in history" [Gutman, "A Cost Analysis of Windows Vista Content Protection"] is at http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.html Peter On 7/19/07, Jim Lux <[EMA

Re: [Beowulf] Sidebar: Vista Rant

2007-07-19 Thread Jim Lux
At 04:20 AM 7/19/2007, andrew holway wrote: http://windowsvistablog.com/blogs/windowsvista/archive/2007/01/20/windows-vista-content-protection-twenty-questions-and-answers.aspx the other foot Note well the following phrases: "...scenario for consumers who are looking to enjoy great next gene

Re: [Beowulf] Sidebar: Vista Rant

2007-07-19 Thread andrew holway
http://windowsvistablog.com/blogs/windowsvista/archive/2007/01/20/windows-vista-content-protection-twenty-questions-and-answers.aspx the other foot On 19/07/07, Tim Cutts <[EMAIL PROTECTED]> wrote: On 19 Jul 2007, at 1:36 am, Chris Samuel wrote: > InnoDB: When MySQL/InnoDB is compiled on Mac

Re: [Beowulf] Sidebar: Vista Rant

2007-07-19 Thread Tim Cutts
On 19 Jul 2007, at 1:36 am, Chris Samuel wrote: InnoDB: When MySQL/InnoDB is compiled on Mac OS X 10.2 or earlier, detect the operating system version at run time and use the fcntl() file flush method on Mac OS X versions 10.3 and later. In Mac OS X, fsync() does not flush the write cache

Re: [Beowulf] Nvidia Tesla GPU clusters?

2007-07-19 Thread Vincent Diepeveen
hi Jon, for each system one card is needed to serve for video. the ones that are not serving for video can be used for normal calculations. Like my laptop has a build in nvidia 8600M GT card, but that card is needed for me to see the display. Please realize the huge wattage those cards eat from t

Re: [Beowulf] MPI2007 out - strange pop2 results?

2007-07-19 Thread Brian Dobbins
Hi guys, Greg, thanks for the link! It will no doubt take me a little while to parse all the MPI2007 info (even though there are only a few submitted results at the moment!), but one of the first things I noticed was that performance of pop2 on the HP blade system was beyond atrocious... any th

[Beowulf] IEEE 1588 (PTP) - a better cluster clock?

2007-07-19 Thread Patrick Ohly
Hello folks, I would like to take the chance and discuss with a broader audience one of the long-standing problems in building Beowulf clusters and present a potential solution for it: NTP to synchronize the system times of different nodes just doesn't cut it. To be fair, it was never designed to