Hi, A reminder: this is coming from a total newbie at this BioCluster stuff. it is also to serve as the seed of a tutorial/history-of-building site for our creation. I am a total newbie in UNIX administration and installation. This is why we will get a system administrator to help us out. But I still have to figure out the right questions to ask!! THE OPERATING SYSTEM Well, it will be Linux of course. Around here, we use Red Hat 7.2, Mandrake and Debian. Any preferences? Any one of them is easier to install/configure for clusters? From what I could figure out from data on the web, it boils down to disk vs. diskless. Since part of the database will reside in each and everyone of the nodes, am I wrong to assume that the nodes need to have Linux on their disk to boot from it? Would it be possible to have the database files on local node disk but still have the nodes boot from a disk image located on the master node? THE KERNEL After reading the archive, I think that any kernel above 2.4.17 is OK for cluster use. Any of these is cluster-optimized? Is it worth the trouble to compile from scratch or a simple download would be enough? What is the decision that will guide someone to change kernel? THE SERVICES Nodes won't need any Internet service besides FTP so that should keep the install small. Any file service needed since some data will reside on the local drive? The head will be a tad more complex. It will have to have some services like sendmail (e-mail of results) and SSH. We do not intend to run Apache: the web-front will reside on a Sun Cube3 that will pass the instructions/data/results to the head via the network. Am I missing something? This is open for helpful and constructive discussion Sylvain ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Sylvain Foisy, Ph. D. Manager BIONEQ - Le Reseau quebecois de bioinformatique Genome-Quebec Tel.: (514) 343-6111 poste 5188 E-mail: foisys@medcn.umontreal.ca ++++++++++++++++++++++++++++++++++++++++++++++++++++++++