LMDB – I love that stuff !

Since few months, I work on LMDB for Azure stuff. First, I have:

  • migrated the library from Linux to Windows x64
  • adapted the .NET Layer Interop
  • made custom clients code

Now, I have setup the Azure Web App Svc for hosting a simple file uploader where files will be stored in LMDB NoSQL database. The way of using it is so simple :

        private static void StoreFile(string path)
        {
            string key = path;
            string value = String.Empty;
            byte[] buffer = File.ReadAllBytes(path);

            LMDBEnvironment _env;
            string dir = "c:\\temp\\cache_net10B";
            _env = new LMDBEnvironment(dir);
            _env.MaxDatabases = 2;
            _env.MapSize = 10485760 * 100;
            _env.Open();

            DateTime dtStart = DateTime.Now;
            var tx = _env.BeginTransaction();
            var db = tx.OpenDatabase("DB", new DatabaseConfiguration { Flags = DatabaseOpenFlags.Create });
            var enc = System.Text.Encoding.UTF8;
            tx.Put(db, enc.GetBytes(key), buffer);
            tx.Commit();
            db.Dispose();

            DateTime dtStop = DateTime.Now;
            TimeSpan ts = dtStop - dtStart;
            string str = String.Format("Time elapsed for set:{0} ms", ts.TotalMilliseconds);
            Logger.LogInfo(str);

            _env.Dispose();
        }

 

If you want to test LMDB in your environement, download that stuff:

Download the LMDB Windows DLL and console_app.Exe
Download the LMDB Windows DLL, the .NET WRapper DLL and console_app.Exe

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