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Diffstat (limited to 'apps/fabric/src/fabric_db_info.erl')
-rw-r--r-- | apps/fabric/src/fabric_db_info.erl | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/apps/fabric/src/fabric_db_info.erl b/apps/fabric/src/fabric_db_info.erl new file mode 100644 index 00000000..3758c5c3 --- /dev/null +++ b/apps/fabric/src/fabric_db_info.erl @@ -0,0 +1,52 @@ +-module(fabric_db_info). + +-export([go/1]). + +-include("fabric.hrl"). +-include_lib("mem3/include/mem3.hrl"). + +go(DbName) -> + Shards = mem3:shards(DbName), + Workers = fabric_util:submit_jobs(Shards, get_db_info, []), + Acc0 = {fabric_dict:init(Workers, nil), []}, + fabric_util:recv(Workers, #shard.ref, fun handle_message/3, Acc0). + +handle_message({ok, Info}, #shard{dbname=Name} = Shard, {Counters, Acc}) -> + case fabric_dict:lookup_element(Shard, Counters) of + undefined -> + % already heard from someone else in this range + {ok, {Counters, Acc}}; + nil -> + C1 = fabric_dict:store(Shard, ok, Counters), + C2 = fabric_view:remove_overlapping_shards(Shard, C1), + case fabric_dict:any(nil, C2) of + true -> + {ok, {C2, [Info|Acc]}}; + false -> + {stop, [{db_name,Name}|merge_results(lists:flatten([Info|Acc]))]} + end + end; +handle_message(_, _, Acc) -> + {ok, Acc}. + +merge_results(Info) -> + Dict = lists:foldl(fun({K,V},D0) -> orddict:append(K,V,D0) end, + orddict:new(), Info), + orddict:fold(fun + (doc_count, X, Acc) -> + [{doc_count, lists:sum(X)} | Acc]; + (doc_del_count, X, Acc) -> + [{doc_del_count, lists:sum(X)} | Acc]; + (update_seq, X, Acc) -> + [{update_seq, lists:sum(X)} | Acc]; + (purge_seq, X, Acc) -> + [{purge_seq, lists:sum(X)} | Acc]; + (compact_running, X, Acc) -> + [{compact_running, lists:member(true, X)} | Acc]; + (disk_size, X, Acc) -> + [{disk_size, lists:sum(X)} | Acc]; + (disk_format_version, X, Acc) -> + [{disk_format_version, lists:max(X)} | Acc]; + (_, _, Acc) -> + Acc + end, [{instance_start_time, <<"0">>}], Dict). |