-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I guess we will play it safe and upgrade every cluster at once so that we won't get bad surprises.
thank you Jeff. On 10/29/2010 06:40 PM, Reuti wrote: > Hi, > > Am 29.10.2010 um 18:27 schrieb Jeff Squyres: > >> I'd have to go check 1.4.3 and 1.4.1 to be sure, but I would generally *NOT* >> assume that different versions like this are compatible. > > I'm getting confused, as these versions are exactly fitting "x.(y+1).*" which > you mention below. So they should work together by design. > > -- Reuti > > >> Open MPI makes an ABI promise (that started with version 1.3.2) that all the >> releases in a given feature series and its corresponding super-stable series >> (i.e., x.y.* and x.(y+1).*, where y is odd) are ABI compatible. But we make >> no guarantees about wire protocols being compatible, or other things like >> that. >> >> So in general, it's "pleasantly surprising" if the different releases work >> together, but I wouldn't rely on it *at all*. :-) >> If I get it well, ABI compatible means something compiled with x.y.* will run on x.y+1.* without the need for you to recompile. mixing x.y and x.y+1 on the same machinefile (and that's what we are talking about) can only work by accident, not by design. >> >> On Oct 29, 2010, at 12:12 PM, guillaume ranquet wrote: >> > Hi list, > I'm sorry to bother you with a stupid question. > > we intend to have for a short period of time, some nodes with 1.4.3 and > others with 1.4.1 (before upgrading everyone to 1.4.3). > > I made various test and found both versions to be running together quite > well with a mixed set of nodes. > > my tests were quite simple, I compiled and ran mpi hello_worlds with > both versions. > It wouldn't be serious for me to assume both versions fully compatible > after these tests -and I must admit I lack the time and technical > knowledge to run further testing. > > has anyone any insight on what have changed that would break compatibility? > I guess nothing, since they are the same major.minor :) > > > regards, > Guillaume Ranquet. >>> _______________________________________________ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users >> >> >> -- >> Jeff Squyres >> jsquy...@cisco.com >> For corporate legal information go to: >> http://www.cisco.com/web/about/doing_business/legal/cri/ >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJMyvxLAAoJEEzIl7PMEAliTnoH/R4GhehUiFZo6eeSh/Rv9KJc ZhAJIRTFH0z7+R2V4ggDyIWFVEv0mktQq/WEqQTbGNyVVvhWVFjCxrI7deZ+FkZS EFv9oIlKM6gNR+cFdoN4xW4ZfiIoCTGddG6XOxLXkZQnhaG30s5UUmIuoBLvgQhb mTq43WdEPpWsSuyMzo48hizT1PFqpPR101ITnIa2y4T5FC5QktJhbp85HbPaNE2Z ej7kwXcgLEnTDk9wF4rZRah8vdIdtxwghwGhytVLqMFBCB4MR8hWMYTakJbIOt/7 GkFtOv0D7hruHhl9dNk+o8VyHMQq6bzlqs3UdQxW1Hx1N2w0ngHK6fzfUnYRVVY= =TsJh -----END PGP SIGNATURE-----
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