Grab bag of Cloudant patches to couch OTP application

- Removal of couch_db and couch_ref_counter processes. Active DBs are
  accessible through a protected ets table owned by couch_server.
- #full_doc_info{} in by_id and by_seq trees for faster compaction at the
  expense of more disk usage afterwards. Proposed as COUCHDB-738 but not
  accepted upstream.
- Replication via distributed Erlang.
- Better hot upgrade support (uses exported functions much more often).
- Configurable btree chunk sizes allow for larger (but still bounded)
  reductions.
- Shorter names for btree fields in #db{} and #db_header{}.
- couch_view_group does not keep a reference to the #db{}.
- Terms are stored compressed (again).

1 files changed, 42 insertions, 0 deletions

diff --git a/apps/couch/src/couch_primary_sup.erl b/apps/couch/src/couch_primary_sup.erl
new file mode 100644
index 00000000..e822b70a
--- /dev/null
+++ b/apps/couch/src/couch_primary_sup.erl
@@ -0,0 +1,42 @@
+-module(couch_primary_sup).
+-behaviour(supervisor).
+-export([init/1, start_link/0]).
+
+start_link() ->
+    supervisor:start_link({local,couch_primary_services}, ?MODULE, []).
+
+init([]) ->
+    Children = [
+        {collation_driver,
+            {couch_drv, start_link, []},
+            permanent,
+            brutal_kill,
+            worker,
+            [couch_drv]},
+        {couch_task_status,
+            {couch_task_status, start_link, []},
+            permanent,
+            brutal_kill,
+            worker,
+            [couch_task_status]},
+        {couch_server,
+            {couch_server, sup_start_link, []},
+            permanent,
+            brutal_kill,
+            worker,
+            [couch_server]},
+        {couch_db_update_event,
+            {gen_event, start_link, [{local, couch_db_update}]},
+            permanent,
+            brutal_kill,
+            worker,
+            dynamic},
+        {couch_replication_supervisor,
+            {couch_rep_sup, start_link, []},
+            permanent,
+            infinity,
+            supervisor,
+            [couch_rep_sup]}
+    ],
+    {ok, {{one_for_one, 10, 3600}, Children}}.
+