Dilger, Andreas wrote:

It should be possible in theory, but we haven't been testing this for the past few releases (maybe 2.5 and later) due to non-existent user demand for 32-bit clients.  Several bugs for 32-bit clients were fixed the last year, and I _think_ the current master branch compiles on 32-bit CPUs.

I don't know about the 2.x branches, but not long ago, jenkins kindly informed me that I broke i686 builds in a patch I submitted for lustre-master patch.  So I can confirm that they are building and tested for el6 with lustre-master ;-)  The real target is Intel's MIC platform, but the automated build and testing appears identical to the x86_64 platforms.  It may not get any additional testing or real hardware testing, but there is still some usage, and I would expect it to mostly work.

I'm open to landing patches to fix such issues if you find them.  You might be better off just spending $60 for a 64-bit CPU :-).

More like $25...  Unless this is a specialized processor like MIC, I have to agree.