[LU-721] Parallel writes to same file results in a file of zeroes

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.2.0, Lustre 2.1.1, Lustre 1.8.7
• Affects Version/s: Lustre 1.8.6
• Environment: Compute node:; - SLES 11 kernel 2.6.32.29-0.3-default; - lustre 1.8.25 build 1.8.5-20110509165255-PRISTINE-2.6.32.29-0.3-default; OSS:; - SLES 10 SP2 kernerl 2.6.16.60-0.42.8_default; - lustre 1.8.4
• Severity: 1
• Bugzilla ID: 24,548
• Assignee: Zhenyu Xu
• Reporter: Zhenyu Xu

Description

this is in an MPI environment.

Total (customer) is running MPI(SGI-MPT, actually) processes on different compute
nodes writing to the same file in pararallel would result in the file
contain zeros. this doesn't happen all the time, but enough to be a severe
issue.

Issue Links

• Trackbacks: Lustre 1.8.x known issues tracker While testing against Lustre b18 branch, we would hit known bugs which were already reported in Lustre Bugzilla https://bugzilla.lustre.org/. In order to move away from relying on Bugzilla, we would create a JIRA
• Trackbacks: Changelog 1.8 {}version 1.8.7wc1{} {}Support for networks: socklnd \any kernel supported by Lustre, qswlnd Qsnet kernel modules 5.20 and later, openiblnd IbGold 1.8.2, o2iblnd OFED 1.3, 1.4.1, 1.4.2, 1.5.1, 1.5.2, 1.5.3.1 and 1.5.3.2 gmlnd GM 2.1....
• Trackbacks: Changelog 2.1 Changes from version 2.1.0 to version 2.1.1 Server support for kernels: 2.6.18274.12.1.el5 (RHEL5) 2.6.32220.el6 (RHEL6) Client support for unpatched kernels: 2.6.18274.12.1.el5 (RHEL5) 2.6.32220.el6 (RHEL6) 2.6.32.360....
• Trackbacks: Changelog 2.2 version 2.2.0 Support for networks: o2iblnd OFED 1.5.4 Server support for kernels: 2.6.32220.4.2.el6 (RHEL6) Client support for unpatched kernels: 2.6.18274.18.1.el5 (RHEL5) 2.6.32220.4.2.el6 (RHEL6) 2.6.32.360....