[ccp4bb] Cluster Design

2011-04-19 Thread Frank Murphy
Dear All, Here at NE-CAT, we make extensive use of XDS in a parallel environment. We are looking to purchase some new hardware, so I am soliciting your opinions. Our current cluster is made up of 16 nodes, each with 2 processors that have four cores, running at 2.2 GHz (I believe). We run with

Re: [ccp4bb] Cluster Design

2011-04-19 Thread Kay Diederichs
Hi Frank, the following are some recommendation for increasing the processing speed of XDS. You can find them (and add to them !) at http://strucbio.biologie.uni-konstanz.de/xdswiki/index.php/Performance . Only item 7 is specific for a cluster. In the order of effect: 1. XDS scales well

Re: [ccp4bb] Cluster Design

2011-04-19 Thread Kay Diederichs
Hi Frank, sorry, my first response was not very specific for your situation! I studied your list and graphs and would just like to point out that in 2.1 Testing Filesystem Performance you may be severely overcommitting the CPU resources, if this was for one machine only with 16 (=8+8) cores.