On 02/22/2017 03:40 AM, Maxime Boissonneault wrote: > Thanks Robert, > While I understand and am all in favor of reusing dependencies, most > packages with dependencies do not provide download hooks for specific > versions of their dependencies. PETSc is this way, I believe OpenFoam > too. When the developers go through this trouble, I prefer to assume > that they know what they are doing and test with specific versions of
Unfortunately they rarely do (when it comes to HPC systems and performance issues at least), they just know that the ordinary user knows even less and try to make it easy for them. > the dependencies. If a user finds a bug, it will be that much simpler to > diagnose if it uses the same versions as the developers. The main reason i see for NOT letting codes like PETSc do their own download and build of sub dependencies, is that those dependencies will not be built in the best way, i.e., they will be suboptimal in speed and sometimes even buggy. But it is always a question of how much time do you have to keep things in sync and updated... I usually prefer to build and test myself and then force PETSc et.al. to use what i already have. But lately the rate of incoming software requests for new stuff has been climbing through the roof. The curse of having a brand new system with lots of toys... -- Ake Sandgren, HPC2N, Umea University, S-90187 Umea, Sweden Internet: a...@hpc2n.umu.se Phone: +46 90 7866134 Fax: +46 90-580 14 Mobile: +46 70 7716134 WWW: http://www.hpc2n.umu.se
