= Compute Resources = <> * In general, the offers are limited to members of I-MATH and their students. * Other UZH members are welcome to contact support@math.uz.ch . * First time user: contact support@math.uzh.ch first. == Reservations == * Short (<1day) computations don't need a reservation, * Longer (>1day) are reccomended to be done with a reservation. * With reservation: In case of maintenance need, we typically schedule the maintenance according to the needs of the user. * Without reservation: We try to contact the user and wait several hours for an answer. * General: if we see running computations, we always contact the user first (independent of whether or not a reservation exists). If the user doesn't answer (weekend, holiday, ...) we decide on our own what to do. == Offers == * For small / ad hoc computations, just start the compute software via the thinlinc environment. * For medium computations, please contact support@math.uzh.ch to ask for the best fitting possibilty and to reserve nodes. * For large computations and professional support please check http://www.s3it.uzh.ch/. == Resources at IMATH == ||Host ||CPU type ||Cores ||RAM ||Local disk ||Purchase || Purpose ||CPU specs || OS || ||rambo|| 1 x AMD EPYC 7742 2,25GHz ||64 (HT enabled ) || 512GB || 240GB, 2TB || 08/2021 ||research ||[[https://www.amd.com/de/products/cpu/amd-epyc-7742|AMD-EPYC-7742]] || Ubuntu 22.04 || ||olive|| 1 x AMD EPYC 7502P 2,5GHz ||32 (HT enabled ) || 512GB || 240GB || 04/2022 ||research ||[[https://www.amd.com/de/products/cpu/amd-epyc-7502p|AMD-EPYC-7502P]] || Ubuntu 22.04 || ||oja|| " ||" || " || " || " ||" ||" || Ubuntu 20.04 || ||stokes|| " ||" || " || " || " ||" ||" || Ubuntu 22.04 || ||walker|| " ||" || " || " || " ||student ||" || Ubuntu 22.04 || === GPU === ||Host ||GPU model ||VRAM || Purchase || Threads || CPU Specs || OS || ||brady ||1 x Gigabyte !GeForce GTX 1070 G1 Gaming ||8GB ||02/2018 ||12 (HT enabled) || 1 x Intel Core 6C i7-8700K 3.70GHz|| Ubuntu 22.04 || ||david ||2 x Gigabyte !GeForce GTX 1070 G1 Gaming ||8GB ||05/2013 ||80 (HT disabled) || 8 x Intel Xeon 10C E7-2850 2.0 GHz || Ubuntu 22.04 || === Old === ||Host ||CPU type ||Cores ||RAM ||Local disk ||Purchase || Purpose ||CPU specs || OS || ||brady ||1 x Intel Core 6C i7-8700K 3.70GHz ||12 (HT enabled) ||64GB ||80GB,2TB ||02/2018 || research ||[[https://www.intel.com/content/www/us/en/products/processors/core/i7-processors/i7-8700k.html|i7-8700K]] || Ubuntu 22.04 || ||david ||8 x Intel Xeon 10C E7-2850 2.0 GHz ||80 (HT disabled) ||2 TB ||300 GB ||05/2013 ||research ||[[http://ark.intel.com/products/53573/Intel-Xeon-Processor-E7-2850-24M-Cache-2_00-GHz-6_40-GTs-Intel-QPI?wapkw=e7-2850|E7-2850]] || Ubuntu 22.04 || ||estonia0 ||2 x Intel Xeon 6C E5-2640 2.50 GHz ||12 (HT disabled) ||256 GB ||2TB ||05/2013 ||research ||[[http://www.intel.com/buy/us/en/product/components/intel-xeon-processor-e5-2640-15m-cache-250-ghz-720-gts-intel-qpi-250678?wapkw=e5-2640#tech_specs|E5-2640]] || Ubuntu 22.04 || ||estonia1 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||estonia2 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||estonia3 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||georgia0 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||georgia1 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||georgia3 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||iran0 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||iran1 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||iran2 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||iran3 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||jordan0 ||" ||" ||" ||" ||" ||professor & assistant: matlab, mathematica, maple, R ||" || Ubuntu 22.04 || ||jordan1 ||" ||" ||" ||" ||" ||" ||" || Ubuntu 22.04 || ||jordan2 ||" ||" ||" ||" ||" ||courses ||" || Ubuntu 22.04 || ||jordan3 ||" ||" ||" ||" ||" ||courses ||" || Ubuntu 22.04 || = Concept = == Access == * The compute nodes can be accessed by SSH only from '''inside''' I-MATH. * Use [[thinlinc]] * matlab, mathematica, maple, R, rstudio: just start the application via menu 'Applications > Science > ...' - you'll automatically be redirected to the appropriate compute server. * For non standard compute software please first log on the compute node via 'ssh', then start the program. * SSH: Log onto 'ssh.math.uzh.ch' and jump to the compute node again via 'ssh'. == Operating System == * Ubuntu LTS (Linux) - all compute servers. * Very very limited software might be installed on some Windows virtual machines. == Storage == * If you need more disk space, please contact support@math.uzh.ch . * Remote (NFS) * Personal Home directory * `/compute/` * Local * `/export/user/` == Programs / Software == * All compute servers use the same applications and versions as installed on the thinlinc terminals. * Please report missing or outdated software or wishes to support@math.uzh.ch . * There is no Intel C or Intel Fortran Compiler. * If you need other program versions than the default one: open a terminal, type the program name followed by two 'TAB' presses: this will show all available installed versions of the specified program. == Parallel computing == * Cluster software * Not installed / offered at I-MATH. * Various MPI packages and libs are installed. Compiling and preparation to run programs later on a distributed compute cluster are possible. * Some programs, like `matlab`, offer limited built-in auto parallelization. * All of the compute nodes are shared memory machines. It's reasonable to start as many programs in parallel as long the `load` is less or equal the number of cores. * Determine the load by using the command `uptime` via a terminal. The last three numbers are the average number of jobs (=load) in the run queue over the last 1, 5 and 15 minutes. {{{ $ uptime 15:55:20 up 22 days, 24 min, 1 user, load average: 11.97, 11.73, 11.62 }}} == Limitations == * Memory * Soft: 64GB * Hard: unlimited * Number of processes per user * Soft: 2048 * Hard: 4096 * Change limitations {{{ $ ulimit -m unlimited $ ulimit -u 4096 }}} * Make sure to increase a hard limit only one time. If you try to increase it a second time, you'll get an error. You have to log out and log in again to get a new chance.