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Mark Kosmowski wrote: > > > Robert G. Brown wrote: > > Rsh "and" anything else is difficulty squared, > > and kerberos isn't the universally implemented tool it was a > decade ago, > > largely superceded by ssh and/or ssl connections. So finding > experts to > > help you make it work if you're a newbie isn't going to be that easy. > > I don't think there's anything difficult about setting up rsh, ssh or > kerberos for anyone who know how to read a manual. A newbie shouldn't be > setting up a cluster in the first place. That's advanced kung-fu best > left to the black belts. Letting a neophyte build and run an HPC cluster > is some kind of oxymoron. > > Yes, I know that professors usually tell some green graduate student to > go build a cluster for the dept, but that's a completely different topic > outside the scope of this list... > > > > I'm either not as much of a newbie / neophyte as I think I am or I > missed the memo about this list being for pro's only. > > As far as the scope of this list, as clustering becomes more and more > prolific, there are going to be more and more newbies. This list is, > like it or not, one of the "franchise" clustering information portals. > When I was first building my first (and only) personal cluster I stopped > by here and at ClusterMonkey primarily to get my feet wet. Most of the > things were (and, frankly, still are) quite above my head, but I was > made aware of many other resources and things to think about - this > increased understanding is helpful even if I don't implement many of the > ideas dicussed here. The end result is a functioning cluster - mayhps > not nearly as elegant as many of the clusters many of the others on the > list maintain, but I get data nonetheless. > > I think it would be a disservice to the community to turn away cluster > newbies from this list. At the very least encouragement and resource > links should be provided. Appropriately experienced list members with a > bit of time are also free to take discussions off to private email if > that is more appropriate than the list in general. After all, the world > is replete with examples of complete newbie's coming up with ideas to > revolutionize the fields to which they are new. > > Mark Kosmowski Let me rephrase my response to RGB's statement: I think the difficulties of setting up rsh/ssh/and kerberos are greatly exaggerated. SSH usually works out of the box, except for the password-less login that requires generating keys. That part is relatively simple, and is documented all over the web. 4 years ago, I set up kerberos for the very first time, without any prior experience. I read through the relevant chapters of the O' Reilly Kerberos book and had it up and running in only a couple of days. Most of that time was spent reading. I disagree with RGB's equation rsh + anything = (difficulty)^2 I found that once kerberos is set up, using kerberized rsh is essentially invisible, therefore rsh + kerberos = difficulty which is a first-order relationship. If anything, setting up rsh is the most difficult one. Why? Since rsh is so insecure, the distro producers/vendors have created many hurdle you must hop to get it working (correct file and owner permissions, etc.) Ironic. - -- Prentice Bisbal Linux Software Support Specialist/System Administrator School of Natural Sciences Institute for Advanced Study Princeton, NJ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFHtgoh2n4m8G8ypgARApKbAKDTM4dDBTbEsPGZ96ATimhh93akEACgqhfW XKuset0dI1xR9rAq3OY38fM= =KQGF -----END PGP SIGNATURE----- _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
