feat: #8824, cache refactor (#8851)

* feat: #8824, cache refactor

ability to disable caches
ability to download contents of cache
refactor cache modules to remove duplicated code

* fix: remove duplicate hit/miss tracking

check cacheEnabled in getUncachedKeys

public/language/en-GB/admin/advanced/cache.json

@@ -1,11 +1,11 @@
 {
 	"post-cache": "Post Cache",
-	"posts-in-cache": "Posts in Cache",
-	"average-post-size": "Average Post Size",
-	"length-to-max": "Length / Max",
 	"percent-full": "%1% Full",
 	"post-cache-size": "Post Cache Size",
 	"items-in-cache": "Items in Cache",
 	"control-panel": "Control Panel",
-	"update-settings": "Update Cache Settings"
+	"update-settings": "Update Cache Settings",
+	"clear": "Clear",
+	"download": "Download",
+	"enabled": "Enabled"
 }

public/openapi/read/admin/advanced/cache.yaml

@@ -23,14 +23,14 @@ get:
                         type: number
                       percentFull:
                         type: number
-                      avgPostSize:
-                        type: number
                       hits:
                         type: string
                       misses:
                         type: string
                       hitRatio:
                         type: string
+                      enabled:
+                        type: boolean
                   groupCache:
                     type: object
                     properties:
@@ -48,6 +48,8 @@ get:
                         type: string
                       hitRatio:
                         type: string
+                      enabled:
+                        type: boolean
                   localCache:
                     type: object
                     properties:
@@ -59,14 +61,14 @@ get:
                         type: number
                       percentFull:
                         type: number
-                      dump:
-                        type: boolean
                       hits:
                         type: string
                       misses:
                         type: string
                       hitRatio:
                         type: string
+                      enabled:
+                        type: boolean
                   objectCache:
                     type: object
                     properties:
@@ -84,6 +86,8 @@ get:
                         type: string
                       hitRatio:
                         type: string
+                      enabled:
+                        type: boolean
                 required:
                   - postCache
                   - groupCache

public/src/admin/advanced/cache.js

@@ -15,6 +15,16 @@ define('admin/advanced/cache', function () {
 				ajaxify.refresh();
 			});
 		});
+		$('.checkbox').on('change', function () {
+			var input = $(this).find('input');
+			var flag = input.is(':checked');
+			var name = $(this).attr('data-name');
+			socket.emit('admin.cache.toggle', { name: name, enabled: flag }, function (err) {
+				if (err) {
+					return app.alertError(err.message);
+				}
+			});
+		});
 	};
 	return Cache;
 });

src/cache.js

@@ -1,56 +1,9 @@
 'use strict';
 
-const LRU = require('lru-cache');
-const pubsub = require('./pubsub');
+const cacheCreate = require('./cacheCreate');
 
-const cache = new LRU({
+module.exports = cacheCreate({
+	name: 'local',
 	max: 4000,
 	maxAge: 0,
 });
-cache.hits = 0;
-cache.misses = 0;
-
-const cacheGet = cache.get;
-const cacheDel = cache.del;
-const cacheReset = cache.reset;
-
-cache.get = function (key) {
-	const data = cacheGet.apply(cache, [key]);
-	if (data === undefined) {
-		cache.misses += 1;
-	} else {
-		cache.hits += 1;
-	}
-	return data;
-};
-
-cache.del = function (key) {
-	if (!Array.isArray(key)) {
-		key = [key];
-	}
-	pubsub.publish('local:cache:del', key);
-	key.forEach(key => cacheDel.apply(cache, [key]));
-};
-
-cache.reset = function () {
-	pubsub.publish('local:cache:reset');
-	localReset();
-};
-
-function localReset() {
-	cacheReset.apply(cache);
-	cache.hits = 0;
-	cache.misses = 0;
-}
-
-pubsub.on('local:cache:reset', function () {
-	localReset();
-});
-
-pubsub.on('local:cache:del', function (keys) {
-	if (Array.isArray(keys)) {
-		keys.forEach(key => cacheDel.apply(cache, [key]));
-	}
-});
-
-module.exports = cache;

src/cacheCreate.js

@@ -0,0 +1,91 @@
+'use strict';
+
+module.exports = function (opts) {
+	const LRU = require('lru-cache');
+	const pubsub = require('./pubsub');
+
+	const cache = new LRU(opts);
+
+	cache.name = opts.name;
+	cache.hits = 0;
+	cache.misses = 0;
+	cache.enabled = opts.hasOwnProperty('enabled') ? opts.enabled : true;
+
+	const cacheSet = cache.set;
+	const cacheGet = cache.get;
+	const cacheDel = cache.del;
+	const cacheReset = cache.reset;
+
+	cache.set = function (key, value) {
+		if (!cache.enabled) {
+			return;
+		}
+		cacheSet.apply(cache, [key, value]);
+	};
+
+	cache.get = function (key) {
+		if (!cache.enabled) {
+			return undefined;
+		}
+		const data = cacheGet.apply(cache, [key]);
+		if (data === undefined) {
+			cache.misses += 1;
+		} else {
+			cache.hits += 1;
+		}
+		return data;
+	};
+
+	cache.del = function (keys) {
+		if (!Array.isArray(keys)) {
+			keys = [keys];
+		}
+		pubsub.publish(cache.name + ':cache:del', keys);
+		keys.forEach(key => cacheDel.apply(cache, [key]));
+	};
+
+	cache.reset = function () {
+		pubsub.publish(cache.name + ':cache:reset');
+		localReset();
+	};
+
+	function localReset() {
+		cacheReset.apply(cache);
+		cache.hits = 0;
+		cache.misses = 0;
+	}
+
+	pubsub.on(cache.name + ':cache:reset', function () {
+		localReset();
+	});
+
+	pubsub.on(cache.name + ':cache:del', function (keys) {
+		if (Array.isArray(keys)) {
+			keys.forEach(key => cacheDel.apply(cache, [key]));
+		}
+	});
+
+	cache.getUnCachedKeys = function (keys, cachedData) {
+		if (!cache.enabled) {
+			return keys;
+		}
+		let data;
+		let isCached;
+		const unCachedKeys = keys.filter(function (key) {
+			data = cache.get(key);
+			isCached = data !== undefined;
+			if (isCached) {
+				cachedData[key] = data;
+			}
+			return !isCached;
+		});
+
+		var hits = keys.length - unCachedKeys.length;
+		var misses = keys.length - hits;
+		cache.hits += hits;
+		cache.misses += misses;
+		return unCachedKeys;
+	};
+
+	return cache;
+};

src/controllers/admin/cache.js

@@ -10,10 +10,8 @@ cacheController.get = function (req, res) {
 	const objectCache = require('../../database').objectCache;
 	const localCache = require('../../cache');
 
-	let avgPostSize = 0;
 	let percentFull = 0;
 	if (postCache.itemCount > 0) {
-		avgPostSize = parseInt((postCache.length / postCache.itemCount), 10);
 		percentFull = ((postCache.length / postCache.max) * 100).toFixed(2);
 	}
 
@@ -23,10 +21,10 @@ cacheController.get = function (req, res) {
 			max: postCache.max,
 			itemCount: postCache.itemCount,
 			percentFull: percentFull,
-			avgPostSize: avgPostSize,
 			hits: utils.addCommas(String(postCache.hits)),
 			misses: utils.addCommas(String(postCache.misses)),
 			hitRatio: ((postCache.hits / (postCache.hits + postCache.misses) || 0)).toFixed(4),
+			enabled: postCache.enabled,
 		},
 		groupCache: {
 			length: groupCache.length,
@@ -36,16 +34,17 @@ cacheController.get = function (req, res) {
 			hits: utils.addCommas(String(groupCache.hits)),
 			misses: utils.addCommas(String(groupCache.misses)),
 			hitRatio: (groupCache.hits / (groupCache.hits + groupCache.misses)).toFixed(4),
+			enabled: groupCache.enabled,
 		},
 		localCache: {
 			length: localCache.length,
 			max: localCache.max,
 			itemCount: localCache.itemCount,
 			percentFull: ((localCache.length / localCache.max) * 100).toFixed(2),
-			dump: req.query.debug ? JSON.stringify(localCache.dump(), null, 4) : false,
 			hits: utils.addCommas(String(localCache.hits)),
 			misses: utils.addCommas(String(localCache.misses)),
 			hitRatio: ((localCache.hits / (localCache.hits + localCache.misses) || 0)).toFixed(4),
+			enabled: localCache.enabled,
 		},
 	};
 
@@ -58,8 +57,31 @@ cacheController.get = function (req, res) {
 			hits: utils.addCommas(String(objectCache.hits)),
 			misses: utils.addCommas(String(objectCache.misses)),
 			hitRatio: (objectCache.hits / (objectCache.hits + objectCache.misses)).toFixed(4),
+			enabled: objectCache.enabled,
 		};
 	}
 
 	res.render('admin/advanced/cache', data);
 };
+
+cacheController.dump = function (req, res, next) {
+	const caches = {
+		post: require('../../posts/cache'),
+		object: require('../../database').objectCache,
+		group: require('../../groups').cache,
+		local: require('../../cache'),
+	};
+	if (!caches[req.query.name]) {
+		return next();
+	}
+
+	const data = JSON.stringify(caches[req.query.name].dump(), null, 4);
+	res.setHeader('Content-disposition', 'attachment; filename= ' + req.query.name + '-cache.json');
+	res.setHeader('Content-type', 'application/json');
+	res.write(data, function (err) {
+		if (err) {
+			return next(err);
+		}
+		res.end();
+	});
+};

src/database/cache.js

@@ -1,56 +1,11 @@
 'use strict';
 
 module.exports.create = function (name) {
-	var LRU = require('lru-cache');
-	var pubsub = require('../pubsub');
-
-	var cache = new LRU({
+	const cacheCreate = require('../cacheCreate');
+	return cacheCreate({
+		name: name + '-object',
 		max: 40000,
 		length: function () { return 1; },
 		maxAge: 0,
 	});
-
-	cache.misses = 0;
-	cache.hits = 0;
-
-	pubsub.on(name + ':hash:cache:del', function (keys) {
-		keys.forEach(key => cache.del(key));
-	});
-
-	pubsub.on(name + ':hash:cache:reset', function () {
-		cache.reset();
-	});
-
-	cache.delObjectCache = function (keys) {
-		if (!Array.isArray(keys)) {
-			keys = [keys];
-		}
-		pubsub.publish(name + ':hash:cache:del', keys);
-		keys.forEach(key => cache.del(key));
-	};
-
-	cache.resetObjectCache = function () {
-		pubsub.publish(name + ':hash:cache:reset');
-		cache.reset();
-	};
-
-	cache.getUnCachedKeys = function (keys, cachedData) {
-		let data;
-		let isCached;
-		const unCachedKeys = keys.filter(function (key) {
-			data = cache.get(key);
-			isCached = data !== undefined;
-			if (isCached) {
-				cachedData[key] = data;
-			}
-			return !isCached;
-		});
-
-		var hits = keys.length - unCachedKeys.length;
-		var misses = keys.length - hits;
-		cache.hits += hits;
-		cache.misses += misses;
-		return unCachedKeys;
-	};
-	return cache;
 };

src/database/mongo/hash.js

@@ -29,7 +29,7 @@ module.exports = function (module) {
 			throw err;
 		}
 
-		cache.delObjectCache(key);
+		cache.del(key);
 	};
 
 	module.setObjectField = async function (key, field, value) {
@@ -164,7 +164,7 @@ module.exports = function (module) {
 		});
 
 		await module.client.collection('objects').updateOne({ _key: key }, { $unset: data });
-		cache.delObjectCache(key);
+		cache.del(key);
 	};
 
 	module.incrObjectField = async function (key, field) {
@@ -191,13 +191,13 @@ module.exports = function (module) {
 				bulk.find({ _key: key }).upsert().update({ $inc: increment });
 			});
 			await bulk.execute();
-			cache.delObjectCache(key);
+			cache.del(key);
 			const result = await module.getObjectsFields(key, [field]);
 			return result.map(data => data && data[field]);
 		}
 
 		const result = await module.client.collection('objects').findOneAndUpdate({ _key: key }, { $inc: increment }, { returnOriginal: false, upsert: true });
-		cache.delObjectCache(key);
+		cache.del(key);
 		return result && result.value ? result.value[field] : null;
 	};
 };

src/database/mongo/main.js

@@ -8,7 +8,7 @@ module.exports = function (module) {
 
 	module.emptydb = async function () {
 		await module.client.collection('objects').deleteMany({});
-		module.objectCache.resetObjectCache();
+		module.objectCache.reset();
 	};
 
 	module.exists = async function (key) {
@@ -47,7 +47,7 @@ module.exports = function (module) {
 			return;
 		}
 		await module.client.collection('objects').deleteMany({ _key: key });
-		module.objectCache.delObjectCache(key);
+		module.objectCache.del(key);
 	};
 
 	module.deleteAll = async function (keys) {
@@ -55,7 +55,7 @@ module.exports = function (module) {
 			return;
 		}
 		await module.client.collection('objects').deleteMany({ _key: { $in: keys } });
-		module.objectCache.delObjectCache(keys);
+		module.objectCache.del(keys);
 	};
 
 	module.get = async function (key) {
@@ -96,7 +96,7 @@ module.exports = function (module) {
 
 	module.rename = async function (oldKey, newKey) {
 		await module.client.collection('objects').updateMany({ _key: oldKey }, { $set: { _key: newKey } });
-		module.objectCache.delObjectCache([oldKey, newKey]);
+		module.objectCache.del([oldKey, newKey]);
 	};
 
 	module.type = async function (key) {

src/database/redis/hash.js

@@ -33,7 +33,7 @@ module.exports = function (module) {
 			await module.client.async.hmset(key, data);
 		}
 
-		cache.delObjectCache(key);
+		cache.del(key);
 	};
 
 	module.setObjectField = async function (key, field, value) {
@@ -48,7 +48,7 @@ module.exports = function (module) {
 			await module.client.async.hset(key, field, value);
 		}
 
-		cache.delObjectCache(key);
+		cache.del(key);
 	};
 
 	module.getObject = async function (key) {
@@ -146,7 +146,7 @@ module.exports = function (module) {
 			return;
 		}
 		await module.client.async.hdel(key, field);
-		cache.delObjectCache(key);
+		cache.del(key);
 	};
 
 	module.deleteObjectFields = async function (key, fields) {
@@ -158,7 +158,7 @@ module.exports = function (module) {
 			return;
 		}
 		await module.client.async.hdel(key, fields);
-		cache.delObjectCache(key);
+		cache.del(key);
 	};
 
 	module.incrObjectField = async function (key, field) {
@@ -182,7 +182,7 @@ module.exports = function (module) {
 		} else {
 			result = await module.client.async.hincrby(key, field, value);
 		}
-		cache.delObjectCache(key);
+		cache.del(key);
 		return Array.isArray(result) ? result.map(value => parseInt(value, 10)) : parseInt(result, 10);
 	};
 };

src/database/redis/main.js

@@ -9,7 +9,7 @@ module.exports = function (module) {
 
 	module.emptydb = async function () {
 		await module.flushdb();
-		module.objectCache.resetObjectCache();
+		module.objectCache.reset();
 	};
 
 	module.exists = async function (key) {
@@ -45,7 +45,7 @@ module.exports = function (module) {
 
 	module.delete = async function (key) {
 		await module.client.async.del(key);
-		module.objectCache.delObjectCache(key);
+		module.objectCache.del(key);
 	};
 
 	module.deleteAll = async function (keys) {
@@ -53,7 +53,7 @@ module.exports = function (module) {
 			return;
 		}
 		await module.client.async.del(keys);
-		module.objectCache.delObjectCache(keys);
+		module.objectCache.del(keys);
 	};
 
 	module.get = async function (key) {
@@ -77,7 +77,7 @@ module.exports = function (module) {
 			}
 		}
 
-		module.objectCache.delObjectCache([oldKey, newKey]);
+		module.objectCache.del([oldKey, newKey]);
 	};
 
 	module.type = async function (key) {

src/groups/cache.js

@@ -1,48 +1,19 @@
 'use strict';
 
-var LRU = require('lru-cache');
-var pubsub = require('../pubsub');
+const cacheCreate = require('../cacheCreate');
 
-var cache = new LRU({
+module.exports = function (Groups) {
+	Groups.cache = cacheCreate({
+		name: 'group',
 		max: 40000,
 		maxAge: 0,
 	});
-cache.hits = 0;
-cache.misses = 0;
-
-module.exports = function (Groups) {
-	Groups.cache = cache;
-
-	pubsub.on('group:cache:reset', function () {
-		localReset();
-	});
-
-	pubsub.on('group:cache:del', function (data) {
-		if (data && data.groupNames) {
-			data.groupNames.forEach(function (groupName) {
-				cache.del(data.uid + ':' + groupName);
-			});
-		}
-	});
-
-	Groups.resetCache = function () {
-		pubsub.publish('group:cache:reset');
-		localReset();
-	};
-
-	function localReset() {
-		cache.reset();
-		cache.hits = 0;
-		cache.misses = 0;
-	}
 
 	Groups.clearCache = function (uid, groupNames) {
 		if (!Array.isArray(groupNames)) {
 			groupNames = [groupNames];
 		}
-		pubsub.publish('group:cache:del', { uid: uid, groupNames: groupNames });
-		groupNames.forEach(function (groupName) {
-			cache.del(uid + ':' + groupName);
-		});
+		const keys = groupNames.map(name => uid + ':' + name);
+		Groups.cache.del(keys);
 	};
 };

src/groups/delete.js

@@ -40,7 +40,7 @@ module.exports = function (Groups) {
 			db.deleteObjectFields('groupslug:groupname', fields),
 			removeGroupsFromPrivilegeGroups(groupNames),
 		]);
-		Groups.resetCache();
+		Groups.cache.reset();
 		plugins.fireHook('action:groups.destroy', { groups: groupsData });
 	};
 

src/groups/membership.js

@@ -31,10 +31,8 @@ module.exports = function (Groups) {
 		const cacheKey = uid + ':' + groupName;
 		let isMember = Groups.cache.get(cacheKey);
 		if (isMember !== undefined) {
-			Groups.cache.hits += 1;
 			return isMember;
 		}
-		Groups.cache.misses += 1;
 		isMember = await db.isSortedSetMember('group:' + groupName + ':members', uid);
 		Groups.cache.set(cacheKey, isMember);
 		return isMember;
@@ -88,10 +86,7 @@ module.exports = function (Groups) {
 		const isMember = Groups.cache.get(uid + ':' + groupName);
 		const isInCache = isMember !== undefined;
 		if (isInCache) {
-			Groups.cache.hits += 1;
 			cachedData[uid + ':' + groupName] = isMember;
-		} else {
-			Groups.cache.misses += 1;
 		}
 		return !isInCache;
 	}

src/groups/update.js

@@ -197,7 +197,7 @@ module.exports = function (Groups) {
 			old: oldName,
 			new: newName,
 		});
-		Groups.resetCache();
+		Groups.cache.reset();
 	};
 
 	async function updateMemberGroupTitles(oldName, newName) {

src/posts/cache.js

@@ -1,14 +1,12 @@
 'use strict';
 
-var LRU = require('lru-cache');
-var meta = require('../meta');
+const cacheCreate = require('../cacheCreate');
+const meta = require('../meta');
 
-var cache = new LRU({
+module.exports = cacheCreate({
+	name: 'post',
 	max: meta.config.postCacheSize,
 	length: function (n) { return n.length; },
 	maxAge: 0,
+	enabled: global.env === 'production',
 });
-cache.hits = 0;
-cache.misses = 0;
-
-module.exports = cache;

src/posts/parse.js

@@ -57,13 +57,12 @@ module.exports = function (Posts) {
 		const cachedContent = cache.get(pid);
 		if (postData.pid && cachedContent !== undefined) {
 			postData.content = cachedContent;
-			cache.hits += 1;
 			return postData;
 		}
-		cache.misses += 1;
+
 		const data = await plugins.fireHook('filter:parse.post', { postData: postData });
 		data.postData.content = translator.escape(data.postData.content);
-		if (global.env === 'production' && data.postData.pid) {
+		if (data.postData.pid) {
 			cache.set(pid, data.postData.content);
 		}
 		return data.postData;

src/privileges/helpers.js

@@ -41,6 +41,9 @@ helpers.isUserAllowedTo = async function (privilege, uid, cid) {
 };
 
 async function isUserAllowedToCids(privilege, uid, cids) {
+	if (!privilege) {
+		return cids.map(() => false);
+	}
 	if (parseInt(uid, 10) <= 0) {
 		return await isSystemGroupAllowedToCids(privilege, uid, cids);
 	}

src/routes/admin.js

@@ -61,6 +61,7 @@ function apiRoutes(router, middleware, controllers) {
 	router.get('/api/admin/users/csv', middleware.authenticate, helpers.tryRoute(controllers.admin.users.getCSV));
 	router.get('/api/admin/groups/:groupname/csv', middleware.authenticate, helpers.tryRoute(controllers.admin.groups.getCSV));
 	router.get('/api/admin/analytics', middleware.authenticate, helpers.tryRoute(controllers.admin.dashboard.getAnalytics));
+	router.get('/api/admin/advanced/cache/dump', middleware.authenticate, helpers.tryRoute(controllers.admin.cache.dump));
 
 	const multipart = require('connect-multiparty');
 	const multipartMiddleware = multipart();

src/socket.io/admin/cache.js

@@ -8,3 +8,16 @@ SocketCache.clear = async function () {
 	require('../../groups').cache.reset();
 	require('../../cache').reset();
 };
+
+SocketCache.toggle = async function (socket, data) {
+	const caches = {
+		post: require('../../posts/cache'),
+		object: require('../../database').objectCache,
+		group: require('../../groups').cache,
+		local: require('../../cache'),
+	};
+	if (!caches[data.name]) {
+		return;
+	}
+	caches[data.name].enabled = data.enabled;
+};

src/views/admin/advanced/cache.tpl

@@ -6,7 +6,13 @@
 				<div class="panel panel-default">
 					<div class="panel-heading"><i class="fa fa-calendar-o"></i> [[admin/advanced/cache:post-cache]]</div>
 					<div class="panel-body">
-						<label>[[admin/advanced/cache:length-to-max]]</label><br/>
+						<div class="checkbox" data-name="post">
+							<label class="mdl-switch mdl-js-switch mdl-js-ripple-effect">
+								<input class="mdl-switch__input" type="checkbox" {{{if postCache.enabled}}}checked{{{end}}}>
+								<span class="mdl-switch__label"><strong>[[admin/advanced/cache:enabled]]</strong></span>
+							</label>
+						</div>
+
 						<span>{postCache.length} / {postCache.max}</span><br/>
 
 						<div class="progress">
@@ -21,16 +27,11 @@
 
 						<hr/>
 
-						<label>[[admin/advanced/cache:posts-in-cache]]</label><br/>
-						<span>{postCache.itemCount}</span><br/>
-
-						<label>[[admin/advanced/cache:average-post-size]]</label><br/>
-						<span>{postCache.avgPostSize}</span><br/>
-
 						<div class="form-group">
 							<label for="postCacheSize">[[admin/advanced/cache:post-cache-size]]</label>
 							<input id="postCacheSize" type="text" class="form-control" value="" data-field="postCacheSize">
 						</div>
+						<a href="{config.relative_path}/api/admin/advanced/cache/dump?name=post" class="btn btn-default"><i class="fa fa-download"></i> [[admin/advanced/cache:download]]</a>
 					</div>
 				</div>
 			</div>
@@ -40,7 +41,12 @@
 				<div class="panel panel-default">
 					<div class="panel-heading"><i class="fa fa-calendar-o"></i> Object Cache</div>
 					<div class="panel-body">
-						<label>[[admin/advanced/cache:length-to-max]]</label><br/>
+						<div class="checkbox" data-name="object">
+							<label class="mdl-switch mdl-js-switch mdl-js-ripple-effect">
+								<input class="mdl-switch__input" type="checkbox" {{{if objectCache.enabled}}}checked{{{end}}}>
+								<span class="mdl-switch__label"><strong>[[admin/advanced/cache:enabled]]</strong></span>
+							</label>
+						</div>
 						<span>{objectCache.length} / {objectCache.max}</span><br/>
 						<div class="progress">
 							<div class="progress-bar" role="progressbar" aria-valuenow="{objectCache.percentFull}" aria-valuemin="0" aria-valuemax="100" style="width: {objectCache.percentFull}%;">
@@ -51,6 +57,7 @@
 						<label>Hits:</label> <span>{objectCache.hits}</span><br/>
 						<label>Misses:</label> <span>{objectCache.misses}</span><br/>
 						<label>Hit Ratio:</label> <span>{objectCache.hitRatio}</span><br/>
+						<a href="{config.relative_path}/api/admin/advanced/cache/dump?name=object" class="btn btn-default"><i class="fa fa-download"></i> [[admin/advanced/cache:download]]</a>
 					</div>
 				</div>
 			</div>
@@ -59,8 +66,12 @@
 				<div class="panel panel-default">
 					<div class="panel-heading"><i class="fa fa-calendar-o"></i> Group Cache</div>
 					<div class="panel-body">
-
-						<label>[[admin/advanced/cache:length-to-max]]</label><br/>
+						<div class="checkbox" data-name="group">
+							<label class="mdl-switch mdl-js-switch mdl-js-ripple-effect">
+								<input class="mdl-switch__input" type="checkbox" {{{if groupCache.enabled}}}checked{{{end}}}>
+								<span class="mdl-switch__label"><strong>[[admin/advanced/cache:enabled]]</strong></span>
+							</label>
+						</div>
 						<span>{groupCache.length} / {groupCache.max}</span><br/>
 
 						<div class="progress">
@@ -72,6 +83,7 @@
 						<label>Hits:</label> <span>{groupCache.hits}</span><br/>
 						<label>Misses:</label> <span>{groupCache.misses}</span><br/>
 						<label>Hit Ratio:</label> <span>{groupCache.hitRatio}</span><br/>
+						<a href="{config.relative_path}/api/admin/advanced/cache/dump?name=group" class="btn btn-default"><i class="fa fa-download"></i> [[admin/advanced/cache:download]]</a>
 					</div>
 				</div>
 			</div>
@@ -79,8 +91,12 @@
 				<div class="panel panel-default">
 					<div class="panel-heading"><i class="fa fa-calendar-o"></i> Local Cache</div>
 					<div class="panel-body">
-
-						<label>[[admin/advanced/cache:length-to-max]]</label><br/>
+						<div class="checkbox" data-name="local">
+							<label class="mdl-switch mdl-js-switch mdl-js-ripple-effect">
+								<input class="mdl-switch__input" type="checkbox" {{{if localCache.enabled}}}checked{{{end}}}>
+								<span class="mdl-switch__label"><strong>[[admin/advanced/cache:enabled]]</strong></span>
+							</label>
+						</div>
 						<span>{localCache.length} / {localCache.max}</span><br/>
 
 						<div class="progress">
@@ -92,11 +108,7 @@
 						<label>Hits:</label> <span>{localCache.hits}</span><br/>
 						<label>Misses:</label> <span>{localCache.misses}</span><br/>
 						<label>Hit Ratio:</label> <span>{localCache.hitRatio}</span><br/>
-
-						<!-- IF localCache.dump -->
-						<pre>{localCache.dump}</pre>
-						<!-- ENDIF localCache.dump -->
-
+						<a href="{config.relative_path}/api/admin/advanced/cache/dump?name=local" class="btn btn-default"><i class="fa fa-download"></i> [[admin/advanced/cache:download]]</a>
 					</div>
 				</div>
 			</div>

test/meta.js

@@ -16,7 +16,7 @@ describe('meta', function () {
 	var herpUid;
 
 	before(function (done) {
-		Groups.resetCache();
+		Groups.cache.reset();
 		// Create 3 users: 1 admin, 2 regular
 		async.series([
 			async.apply(User.create, { username: 'foo', password: 'barbar' }),	// admin

test/mocks/databasemock.js

@@ -168,7 +168,7 @@ async function setupMockDefaults() {
 	const meta = require('../../src/meta');
 	await db.emptydb();
 
-	require('../../src/groups').resetCache();
+	require('../../src/groups').cache.reset();
 	require('../../src/posts/cache').reset();
 	require('../../src/cache').reset();
 	winston.info('test_database flushed');