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On 12/12/13 20:30, M Dinsmore wrote: > Hi All, > > It would be useful to know how many are planning to bring a raspberry > pi to the lug meet tomorrow to join the cluster. > > To add your pi to the cluster you'll need: > > * Raspberry Pi Model B (either Rev1 or Rev2) > * Blank SD card or even better card with the cluster image > (https://dl.dropboxusercontent.com/u/72675020/rpi-cluster.tar.bz2) > written to it. > * Power supply > * Network cable (not essential that everyone brings one as i will > bring 6) > > > We will need several mains extension blocks, if you've got one easily > accessable please bring it along. I've got 3 x 4 way that I plan to > bring along. > > There's no need for screen and keyboards for ordinary nodes. I plan > to bring one for the master node but it may be useful if someone else > could bring one for debugging hostname / IP Address issues. > > If memory server me right, we have two 16 port network switches at the > Exwick centre, I'm assuming that will be enough. Can anyone please > confirm how many network switches we have at the centre? > > Just to whet your appetite ... > > I've run the program with one Pi (See Number of processes below) As > you can see below the time taken was just under 30 minutes. > > ****************************************************** > * Calculate Pi using the Monte Carlo method > ****************************************************** > * Exeter Linux User Group Raspberry Pi Beowulf Cluster > * > * Cluster Hosts : /home/mpi/config/mpihosts > * Cluster Processes file : /home/mpi/config/mpiprocs > * Number of Processes : 1 > * Available Cluster hosts : > * mpi010 mpi011 mpi012 mpi013 mpi014 mpi015 mpi016 mpi017 mpi018 > mpi019 > * mpi020 mpi021 mpi022 mpi023 mpi024 mpi025 mpi026 mpi027 mpi028 > mpi029 > * mpi030 mpi031 mpi032 mpi033 mpi034 mpi035 mpi036 mpi037 mpi038 > mpi039 > * > Process 1 of 1 is on mpi010 - Calculating pi using 10000000000 rectangles > pi is approximately 3.1415926535894507, Error is 0.0000000000003424 > wall clock time = 1794.485791 > > Running a program with the monte carlo algorithm (but without the > cluster overhead) on my laptop takes 4 minutes 50 seconds. It will be > interesting to see if we can get enough Pies in the cluster to beat it... > > See you tomorrow... > > Malcolm > > I am coming up with Tom Brough, so will bring my pi with me, and the bits needed to connect, I can bring some network cable too. Paul -- -- http://www.zleap.net http://www.linkedin.com/pub/paul-sutton/36/595/911 Exeter Lug meet : 13th December 2013 - http://exeter.lug.org.uk/ Torbay Raspberry Pi Jam 14th December 2013 - http://dcglug.drogon.net/torbay-pi-jam/ I am committed to safeguarding children, young people and vulnerable groups and expect any school or establishment I am involved with to share this commitment. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq