From b4b442c897292218c0142e9cbb2b8d0be0b519ea Mon Sep 17 00:00:00 2001
From: calzoneman <calzoneman@gmail.com>
Date: Fri, 9 Oct 2015 23:16:21 -0700
Subject: [PATCH] bgtask: run channel saves serially to prevent thrashing

---
 package.json  | 2 +-
 src/bgtask.js | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/package.json b/package.json
index 55d9f820..454beddc 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "author": "Calvin Montgomery",
   "name": "CyTube",
   "description": "Online media synchronizer and chat",
-  "version": "3.11.1",
+  "version": "3.11.2",
   "repository": {
     "url": "http://github.com/calzoneman/sync"
   },
diff --git a/src/bgtask.js b/src/bgtask.js
index a966f60d..e2fb9e75 100644
--- a/src/bgtask.js
+++ b/src/bgtask.js
@@ -8,6 +8,7 @@
 var Logger = require("./logger");
 var Config = require("./config");
 var db = require("./database");
+var Promise = require("bluebird");
 
 var init = null;
 
@@ -61,14 +62,13 @@ function initChannelDumper(Server) {
     var CHANNEL_SAVE_INTERVAL = parseInt(Config.get("channel-save-interval"))
                                 * 60000;
     setInterval(function () {
-        for (var i = 0; i < Server.channels.length; i++) {
-            var chan = Server.channels[i];
+        Promise.reduce(Server.channels, (_, chan) => {
             if (!chan.dead && chan.users && chan.users.length > 0) {
-                chan.saveState().catch(err => {
+                return chan.saveState().catch(err => {
                     Logger.errlog.log(`Failed to save /r/${chan.name}: ${err.stack}`);
                 });
             }
-        }
+        }, 0);
     }, CHANNEL_SAVE_INTERVAL);
 }