ooici/coi-services — pull request #1295 by lukecampbell (2013-08-23 18:18:06+00:00)
Title: Changes default h5py opening mode from r+ to r

The default opening mode is 'r+' which is actually read/write, this patch
changes the default behavior so that when files are opened with no mode
explicitly specified they are opened in read-only without the use of an
exclusion lock.

This patch may cause unforeseen issues if readers depend on write privileges;
there is no evidence to suggest that they do.