Re: [Beowulf] Open source Job Scheduler for Apple Leopard 10.5.2 server that will work with Open Directory?

2008-02-28 Thread Chris Dagdigian
My colleague Bill Van Etten appears to have fixed the SGE and Open Directory issues with recent versions of Grid Engine (SGE). Some minor patches are required as is compiling the binaries yourself from source (until changes get merged into the codebase). This document describes the patch

Re: [Beowulf] What are people seeing performance-wise for NFS over 10GbE

2008-02-28 Thread Li, Bo
Just a silly question, Is there anybody got the similiar benchmark for Samba or Windows file sharing? Regards, Li, Bo - Original Message - From: "Joe Landman" <[EMAIL PROTECTED]> To: "Beowulf Mailing List" Sent: Thursday, February 28, 2008 9:53 PM Subject: [Beowulf] What are people seei

Re: [Beowulf] What are people seeing performance-wise for NFS over 10GbE

2008-02-28 Thread Jan Heichler
Hallo Joe, Donnerstag, 28. Februar 2008, meintest Du: JL>Have a few simple setups that I am trying to figure out if I have a JL> problem, or if what I am seeing is normal. JL>Two 10 GbE cards, connected with a CX4 cable. Server is one of our JL> JackRabbits, with 750+ MB/s direct IO and

Re[2]: [Beowulf] What are people seeing performance-wise for NFS over 10GbE

2008-02-28 Thread Jan Heichler
Hallo Joe, Donnerstag, 28. Februar 2008, meintest Du: >> The best i saw for NFS over 10 GE was about 350-400 MB/s write and about 450 >> MB/s read. >> Single server to 8 simultaneous accessing clients (aggregated performance). The clients had a 1 gig uplink... JL> Hi Jan: JL>Ok. Thank

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread Mark Hahn
STREAM Benchmark implementation in CUDA Array size (single precision)=800 using 128 threads per block, 62500 blocks Function Rate (MB/s) Avg time Min time Max time Copy: 16706.3212 0.0039 0.0038 0.0044 Scale: 1.2770 0.0046 0.0038

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread Mark Hahn
How do your Rate numbers correlate to the max bandwitdh of 32GB/s (http://en.wikipedia.org/wiki/GeForce_8_Series)? good point. I had assumed the quoted numbers were merely in-cache, but it does claim to be running on array size 2e6 (8e6 bytes), which seems a bit large for in-cache. (though ver

Re: [Beowulf] What are people seeing performance-wise for NFS over 10GbE

2008-02-28 Thread Joe Landman
Jan Heichler wrote: Hallo Joe, Donnerstag, 28. Februar 2008, meintest Du: [...] The best i saw for NFS over 10 GE was about 350-400 MB/s write and about 450 MB/s read. Single server to 8 simultaneous accessing clients (aggregated performance). Hi Jan: Ok. Thanks. This is quite helpfu

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread Bill Broadley
Mattijs Janssens wrote: How do your Rate numbers correlate to the max bandwitdh of 32GB/s (http://en.wikipedia.org/wiki/GeForce_8_Series)? Or do these threads all operate on the same data? My first guess was some kind of caching, after all 2M floats is only 8MB. But I couldn't reproduct it

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread Peter St. John
Jim, Just re: "If one wanted to design revolutionary distributed/parallel computing algorithms, one could probably work with floppy disks and sneakernet. If it works there, it will certainly work on any faster mechanism. See.. true computer science doesn't need a 1000 processor cluster." I agree

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread Mattijs Janssens
How do your Rate numbers correlate to the max bandwitdh of 32GB/s (http://en.wikipedia.org/wiki/GeForce_8_Series)? Or do these threads all operate on the same data? Mattijs On Thursday 28 February 2008 08:38, John Hearns wrote: > On Wed, 2008-02-27 at 23:30 -0800, Bill Broadley wrote: > > I don

[Beowulf] Open source Job Scheduler for Apple Leopard 10.5.2 server that will work with Open Directory?

2008-02-28 Thread Korambath, Prakashan
Anyone knows an Open source job scheduler for Apple Leopard 10.5.2 server that will work with Open Directory? SGE seems to have intermittent problems, Condor and Torque supports only 10.4. Tiger. Thanks. Prakashan Korambath ___ Beowulf mailing list,

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread Vincent Diepeveen
On Feb 28, 2008, at 4:33 PM, Mark Hahn wrote: The problem with many (cores|threads) is that memory bandwidth wall. A fixed size (B) pipe to memory, with N requesters on that pipe ... What wall? Bandwidth is easy, it just costs money, and not much at that. Want 50GB/sec[1] buy a $170 v

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread Jim Lux
Quoting Mark Hahn <[EMAIL PROTECTED]>, on Thu 28 Feb 2008 07:33:07 AM PST: The problem with many (cores|threads) is that memory bandwidth wall. A fixed size (B) pipe to memory, with N requesters on that pipe ... What wall? Bandwidth is easy, it just costs money, and not much at th

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread Mark Hahn
The problem with many (cores|threads) is that memory bandwidth wall. A fixed size (B) pipe to memory, with N requesters on that pipe ... What wall? Bandwidth is easy, it just costs money, and not much at that. Want 50GB/sec[1] buy a $170 video card. Want 100GB/sec... buy a Heh... if it

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread Jim Lux
Quoting Joe Landman <[EMAIL PROTECTED]>, on Thu 28 Feb 2008 05:20:01 AM PST: Bill Broadley wrote: The problem with many (cores|threads) is that memory bandwidth wall. A fixed size (B) pipe to memory, with N requesters on that pipe ... What wall? Bandwidth is easy, it just costs money

[Beowulf] What are people seeing performance-wise for NFS over 10GbE

2008-02-28 Thread Joe Landman
Hi folks: Have a few simple setups that I am trying to figure out if I have a problem, or if what I am seeing is normal. Two 10 GbE cards, connected with a CX4 cable. Server is one of our JackRabbits, with 750+ MB/s direct IO and 500-650 MB/s buffered IO (read-write), for IO about 10x s

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread Joe Landman
Bill Broadley wrote: The problem with many (cores|threads) is that memory bandwidth wall. A fixed size (B) pipe to memory, with N requesters on that pipe ... What wall? Bandwidth is easy, it just costs money, and not much at that. Want 50GB/sec[1] buy a $170 video card. Want 100GB/sec... bu

Re: [Beowulf] Opinions of Hyper-threading?

2008-02-28 Thread John Hearns
On Wed, 2008-02-27 at 23:30 -0800, Bill Broadley wrote: > > I don't see any particular reason why memory bandwidth can go through a full > doublings in the near future if there was a market for it, last I checked > nvidia was doing pretty well ;-) > > [1] Sorry to use marketing bandwidth, I've