Merge pull request #2 from ceph/master

Rebase from upstream

roles/ceph-common/tasks/main.yml

@@ -36,3 +36,6 @@
 - name: Disable OSD directory parsing by updatedb
   command: updatedb -e /var/lib/ceph
   ignore_errors: true
+
+- name: Increase PID max value to a very large value
+  sysctl: name="kernel.pid_max" value=4194303 state=present sysctl_file=/etc/sysctl.conf

roles/ceph-common/templates/ceph.conf.j2

@@ -56,6 +56,11 @@
   debug_rgw = 0/0
 {% endif %}
 
+[client]
+  rbd cache = true
+  rbd cache writethrough until flush = true
+  admin socket = /var/run/ceph/rbd-client-$pid.asok
+
 [mon]
   mon osd down out interval = {{ mon_osd_down_out_interval }}
   mon osd min down reporters = {{ mon_osd_min_down_reporters }}

roles/ceph-common/vars/main.yml

@@ -10,7 +10,7 @@
 ## Packages branch
 ceph_key: https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/release.asc
 ceph_stable: true # use ceph stable branch
-ceph_stable_release: firefly # ceph stable release
+ceph_stable_release: giant # ceph stable release
 
 # This option is needed for _both_ stable and dev version, so please always fill the right version
 # # supported distros are el6, rhel6, f18, f19, opensuse12.2, sles11, centos7 (see http://ceph.com/rpm-firefly/)