Upstream has several fixes and improvements that are fairly critical, including data corruption bugs. We should update to 1.16 for EPEL6 and Fedora. Notably for my use case, 1.13 fixes a bug on clamping max_open_files which I believe is causing my processes to consume thousands of file handles and causing crashes on a large DB. There is a rather large set of bug fixes: https://code.google.com/p/leveldb/source/list
FYI: Since our need was urgent, I rolled a custom RPM for my local repo using the existing spec. I updated to 1.15.0 and disabled Patch 2, which seems to have made its way upstream (or at least some sort of reasonable facsimile thereof). It is working fine, and does solve our problem of file handle exhaustion. We were crashing on thousands of open file handles with the broken max_open_files clamping they fixed in 1.13.0. I'm not 100% certain about the Patch 2 status since I'm not a cross-platform expert, so someone more in the know should verify its status.
Marking as RFE/FutureFeature so this doesn't get auto-closed.
Peter, I need leveldb 1.15.0 as well, is there anything I can do to help?
*** This bug has been marked as a duplicate of bug 1306611 ***