Azure Cache/DataCache style Regions in Redis

Question

I am in the planning process of moving a C# ASP.Net web application over to Azure (currently hosted on a single dedicated server) and am looking at caching options. Currentl

Answer 1

You can use this method which leverage the async/await features and redis pipelining to delete keys by pattern using stack exchange redis client

private static Task DeleteKeysByPatternAsync(string pattern)
{
    IDatabase cache1 = Connection.GetDatabase();
    var redisServer1 = Connection.GetServer(Connection.GetEndPoints().First());
    var deleteTasks = new List();
    var counter = 0;
    foreach (var key in redisServer1.Keys(pattern: pattern, database: 0, pageSize: 5000))
    {
        deleteTasks.Add(cache1.KeyDeleteAsync(key));
        counter++;
        if (counter % 1000 == 0)
            Console.WriteLine($"Delete key tasks created: {counter}");
    }
    return Task.WhenAll(deleteTasks);
}

Then you can use it like this:

DeleteKeysByPatternAsync("*user:*").Wait(); //If you are calling from main method for example where you cant use await.

or

await DeleteKeysByPatternAsync("*user:*"); //If you run from async method

You can tweak the pageSize or receive as method param.