Ldiskfs is the default on disk file system for Lustre, used to format the disk volumes and actually store the data, on the MDT, OSTs, and MGT. It's EXT4 derived. It's possible to mount individual Lustre targets as ldiskfs, and is occasionally necessary for troubleshooting. (So, it's a critical server component.) ________________________________________ From: HPDD-discuss [hpdd-discuss-bounces(a)lists.01.org] on behalf of Kurt Strosahl [strosahl(a)jlab.org] Sent: Wednesday, March 11, 2015 2:07 PM To: hpdd-discuss(a)ml01.01.org Subject: Re: [HPDD-discuss] missing symbol errors when installing lustre-osd-ldiskfs-.5.3-2.6.32_431.23.3.el6_lustre.x86_64.x86_64 Ahh, modprobe does work for those, so I suppose it is ok. So what role does that package play in the lustre file system? If it isn't necessary for the mds/mdt or the ost systems then I'll pull it. w/r, Kurt ------------------------------ Message: 2 Date: Tue, 10 Mar 2015 15:58:48 -0500 From: Patrick Farrell <paf(a)cray.com&gt; To: <hpdd-discuss(a)lists.01.org&gt; Subject: Re: [HPDD-discuss] missing symbol errors when installing lustre-osd-ldiskfs-.5.3-2.6.32_431.23.3.el6_lustre.x86_64.x86_64 Message-ID: <54FF5B08.6050004(a)cray.com&gt; Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Kurt, The ll_* errors, at least, are normal. The install order is such that some symbols are undefined at install time for particular KOs, but are defined in KOs that are installed later. I am not familiar with the ldiskfs unknown symbol errors, but I haven't installed the exact RPMs you're installing either. If you can modprobe ldiskfs and fsfilt-ldiskfs after completing the install, then these are probably the same as the ll_* - Undefined at install time, but defined by later KOs. - Patrick Farrell _______________________________________________ HPDD-discuss mailing list HPDD-discuss(a)lists.01.org https://lists.01.org/mailman/listinfo/hpdd-discuss