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download the example here:https://github.com/apache/ignite/tree/master/modules/platforms/dotnet/examples

Adjust the code in ServerNode.Program.cs

   namespace Apache.Ignite.Examples.ServerNode
{
    public static class Program
    {
        public static void Main()
        {
            using (var ignite = Ignition.Start(Utils.GetServerNodeConfiguration()))
            {
                ignite.GetCluster().SetActive(true);  **//add one line code here**
                Utils.DeployDefaultServices(ignite);
                .....
            }
        }
    }
}

Adjust the code in Util.cs

public static IgniteConfiguration GetServerNodeConfiguration()
        {
            return new IgniteConfiguration
            {
                Localhost = "127.0.0.1",
                .......
                PeerAssemblyLoadingMode = PeerAssemblyLoadingMode.CurrentAppDomain,
                **//add some code here to enable persistence**
                DataStorageConfiguration = new DataStorageConfiguration
                {
                    DefaultDataRegionConfiguration = new DataRegionConfiguration
                    {
                        Name = "Default_Region",
                        PersistenceEnabled = true 
                    }
                }
            };
        }

Add the destroycache method into Apache.Ignite.Examples.Thin.Sql.LinqThin.Program Main method like this:

public static void Main()
        {
            using (var ignite = Ignition.StartClient(Utils.GetThinClientConfiguration()))
            {
                Console.WriteLine();
                Console.WriteLine(">>> Cache LINQ example started.");
                ........

                var sw = Stopwatch.StartNew();
                ignite.DestroyCache(OrganizationCacheName);
                sw.Stop();
                Console.WriteLine($"DESTROY COST {sw.ElapsedMilliseconds}");
                .....
            }

             ....
        }

When execute the detroyCache method, it throws socket timeout exception sometimes, or it cost long time sometimes if destroy successfully. But all is OK when destroyCache if donot enable persistence.

user17785356
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1 Answers1

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Creating and destroying caches can be slower with persistence, especially on HDD (as opposed to SSD).

You can increase socket timeout like this:

            var cfg = new IgniteClientConfiguration
            {
                ...
                SocketTimeout = TimeSpan.FromSeconds(15)
            };

That being said, I've tried the steps above and it prints DESTROY COST 140 on my machine (Core i7-9700, SSD).

Pavel Tupitsyn
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  • THANK YOU@Pavel. But I want to know why destroyCache so slow. I tried 600 Orgnization objects, and it cost 30 seconds to destroy. Why destroy persistence data so slow !! – user17785356 Dec 29 '21 at 10:59
  • @user17785356 what is your hardware? CPU, disk? – Pavel Tupitsyn Dec 29 '21 at 11:32
  • THANK YOU@Pavel. My hardware: CPU: Intel(R) Core(TM) i5-10400 @2.90GHz 12 Cores; RAM:16GB; OS: Windows-10 Enterprise LTSC; Dotnet 5.0; JDK 11; Ignite 11； – user17785356 Dec 29 '21 at 13:31
  • I modified nothing except the 3 points as i mentioned above in my question. – user17785356 Dec 29 '21 at 13:37
  • hello, My persistence data is on HDD disk and its capacity is enough(Total 464G) – user17785356 Dec 30 '21 at 01:14
  • @user17785356 Ignite persistence is optimized for industry-grade SSD storage. Using HDDs, especially consumer-grade, is not recommended. https://ignite.apache.org/docs/latest/persistence/persistence-tuning#purchase-production-level-ssds – Pavel Tupitsyn Dec 30 '21 at 06:17