Brian Foster 17f2871724 glusterfs: discard (hole punch) support
Add support for the DISCARD file operation. Discard punches a hole
in a file in the provided range. Block de-allocation is implemented
via fallocate() (as requested via fuse and passed on to the brick
fs) but a separate fop is created within gluster to emphasize the
fact that discard changes file data (the discarded region is
replaced with zeroes) and must invalidate caches where appropriate.

BUG: 963678
Change-Id: I34633a0bfff2187afeab4292a15f3cc9adf261af
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-on: http://review.gluster.org/5090
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>
2013-06-13 14:37:43 -07:00
..
2013-04-19 01:55:36 -07:00

How to use test script framework.
=================================

- Build and install the version of glusterfs with your changes. Make
  sure the installed version is accessible from $PATH.

- To mount glusterfs, NEVER use 'mount -t glusterfs', instead use
  'glusterfs -s ' method. This is because with the patch build setup
  doesnot install the /sbin/mount.glusterfs necessary, where as the
  glusterfs binary will be accessible with $PATH, and will pick the
  right version.

- (optional) Set environment variables to specify location of
  export directories and mount points. Unless you have special
  requirements, the defaults should just work. The variables
  themselves can be found at the top of tests/include.rc. All
  of them can be overriden with environment variables.

- Execute run-tests.sh in the top level directory as root.

- If some test cases fail, you can execute the failed test case script
  directly bypassing run-tests.sh. At this time it might be
  useful to set the envrionment variable DEBUG=1 before running
  the individual test script directly by hand.

- BE WARNED THAT THE TEST CASES DELETE /var/lib/glusterd/* !!!