iilyak commented on a change in pull request #3766:
URL: https://github.com/apache/couchdb/pull/3766#discussion_r774761365
##########
File path: src/smoosh/src/smoosh_channel.erl
##########
@@ -194,21 +215,128 @@ handle_info(check_window, State0) ->
end,
erlang:send_after(60 * 1000, self(), check_window),
{noreply, FinalState};
+handle_info(persist_queue, State0) ->
+ #state{waiting = Queue} = State0,
+ write_state_to_file(State0),
+ smoosh_priority_queue:write_to_file(Queue),
+ Checkpoint =
+ config:get_integer(
+ "smoosh", "state_checkpoint_interval_in_sec",
?DEFAULT_CHECKPOINT_INTERVAL_IN_SEC
+ ) * 1000,
+ erlang:send_after(Checkpoint, self(), persist_queue),
+ {noreply, State0};
handle_info(pause, State0) ->
- {ok, State} = code_change(nil, State0, nil),
+ State = maybe_open_queue(State0),
{noreply, State#state{paused = true}};
handle_info(unpause, State0) ->
- {ok, State} = code_change(nil, State0, nil),
+ State = maybe_open_queue(State0),
{noreply, maybe_start_compaction(State#state{paused = false})}.
-terminate(_Reason, _State) ->
+terminate(_Reason, #state{name = Name, waiting = Q}) ->
+ file:delete(active_file_name(Name)),
Review comment:
It looks like we should distinguish the case of a node restart from a
smoosh_channel restart. I suggest investigating the inclusion of node start
timestamp into filename. If timestamp is the same we restore the `waiting`
otherwise we use enqueue. In any case this logic would need to go into recover.
```
NodeStartTime = erlang:convert_time_unit(erlang:time_offset() +
erlang:system_info(start_time), native, millisecond).
```
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