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POC# redis vs mongodb performance
 

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    <p>I'm doing a research with different nosql caches/databases.</p> <p>The following performance test was done with C# mongo driver 1.8.3.9 and ServiceStack.Redis 3.9.57.0.</p> <p>MongoDB 2.4</p> <p>Redis 2.6.16</p> <pre><code>private List&lt;string&gt; GetListStrings() { var list = new List&lt;string&gt;(count); for (int i = 0; i &lt; count; i++) { list.Add(Guid.NewGuid().ToString()); } return list; } </code></pre> <p>Mongo Test Method</p> <pre><code>public class TestStrings { [BsonId] public ObjectId Id { get; set; } public string[] List { get; set; } } public void SendIdsMongo() { var idsEntity = new TestStrings { List = GetListStrings().ToArray() }; var client = new MongoClient(mongoConnectionString); MongoServer server = client.GetServer(); MongoDatabase database = server.GetDatabase("newdb"); var col = database.GetCollection("l2"); Utils.TimeLog("Insert", () =&gt; { col.Insert(idsEntity, WriteConcern.Acknowledged); }); Utils.TimeLog("FindOneByIdAs", () =&gt; { var ret = col.FindOneByIdAs&lt;TestStrings&gt;(idsEntity.Id); Console.Write(ret.List.Length); }); } </code></pre> <p>Redis Test Method</p> <pre><code>[TestMethod] public void SendIdsRedis() { var key = Guid.NewGuid().ToString(); var list = GetListStrings(); using (var redisClient = manager.GetClient()) { Utils.TimeLog("AddRangeToList", () =&gt; redisClient.AddRangeToList(key, list)); Utils.TimeLog("GetRangeFromList", () =&gt; { var ret = redisClient.GetAllItemsFromList(key); Console.WriteLine(ret.Count); }); } } </code></pre> <p>When I'm inserting 10000 items list into both i'm getting </p> <p>Mongo: 0.27 write, 0.031 read</p> <p>Redis: 0.26 write, 0.013 read</p> <p>Now I'm trying to do the same concurrently spinning 100 threads</p> <pre><code>var results = new TimeSpan[tasksCount]; Utils.TimeLog("total: ", () =&gt; { Parallel.For(0, tasksCount, x =&gt; { Stopwatch stopwatch = Stopwatch.StartNew(); SendIdsRedis(); //SendIdsMongo() stopwatch.Stop(); results[x] = stopwatch.Elapsed; }); }); Console.WriteLine("avg: " + results.Aggregate((a, b) =&gt; a + b).TotalSeconds / tasksCount); </code></pre> <p>The results I'm getting are surprising.</p> <p>Mongo: total: : 2.5217096 avg: 0.210511518</p> <p>Redis: total: : 17.249888 avg: 2.275050013</p> <p>Mongo in my test appeared to be much faster than Redis with many concurrent requests. And the more threads I added the bigger gap was. I was expecting different results based on what I read. Why?</p> <p>Both running on the same VM</p> <p>CentOS 6.4 Intel(R) Core(TM) i7-2860QM CPU @ 2.50GHz</p> <p>4Gb Ram</p>
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