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    <p>After a few hours of work i found that it is possible to split files that are large into smaller files and store it to Azure cache. I would like to share the code with you.</p> <p>Class for splitting and joining byte[]</p> <pre><code> public class CacheHelper { private const int kMaxFileSize = 8000000; private readonly int fFileSize; private readonly string fFileName; public CacheHelper(int sizeOfFile, string nameOfFile) { fFileSize = sizeOfFile; fFileName = nameOfFile; } public CachingObjectHolder Split(byte[] file) { var remainingSize = file.Length; var partialList = new List&lt;byte[]&gt;(); var partial = new byte[file.Length &gt; kMaxFileSize ? kMaxFileSize : file.Length]; for (int i = 0; i &lt; file.Length; i++) { if (i % kMaxFileSize == 0 &amp;&amp; i &gt; 0) { partialList.Add(partial); partial = new byte[remainingSize &gt; kMaxFileSize ? kMaxFileSize : remainingSize]; } partial[i % kMaxFileSize] = file[i]; remainingSize--; } partialList.Add(partial); return new CachingObjectHolder(fFileName, partialList); } public static byte[] Join(CachingObjectHolder cachingObjectHolder) { var totalByteSize = cachingObjectHolder.Partials.Sum(x =&gt; x.Length); var output = new byte[totalByteSize]; var globalCounter = 0; for (int i = 0; i &lt; cachingObjectHolder.Partials.Count; i++) { for (int j = 0; j &lt; cachingObjectHolder.Partials[i].Length; j++) { output[globalCounter] = cachingObjectHolder.Partials[i][j]; globalCounter++; } } return output; } public static byte[] CreateFile(int size) { var tempFile = Path.GetTempFileName(); using (var stream = new FileStream(tempFile, FileMode.OpenOrCreate)) { using (var memStream = new MemoryStream()) { stream.SetLength(size); stream.CopyTo(memStream); return memStream.ToArray(); } } } } </code></pre> <p>Here is the code for communication with the Azure Cache</p> <pre><code> public class Cache { private const string kFileListName = "FileList"; public static DataCacheFactory DataCacheFactory { get { return new DataCacheFactory(); } } private static DataCache fDataCache; public static DataCache DataCache { get { if(fDataCache == null) { fDataCache = DataCacheFactory.GetDefaultCache(); } return fDataCache; } } public static byte[] Get(string name) { var dic = GetFileList(); if (dic == null) { return (byte[])DataCache.Get(name); } if (dic.ContainsKey(name)) { var list = dic[name]; var input = new List&lt;byte[]&gt;(); var cache = DataCache; list = list.OrderBy(x =&gt; x.Item2).ToList(); for (int i = 0; i &lt; list.Count; i++) { input.Add(cache.Get(list[i].Item1) as byte[]); } var holder = new CachingObjectHolder(name, input); return CacheHelper.Join(holder); } else { return (byte[])DataCache.Get(name); } } public static void Put(string name, byte[] file) { if (file.Length &gt; CacheHelper.kMaxFileSize) { var helper = new CacheHelper(file.Length, name); var output = helper.Split(file); var dic = GetFileList(); if (dic == null) { dic = new Dictionary&lt;string, List&lt;Tuple&lt;string, int&gt;&gt;&gt;(); } var partials = new List&lt;Tuple&lt;string, int&gt;&gt;(); for (int i = 0; i &lt; output.CachingObjects.Count; i++) { DataCache.Add(output.CachingObjects[i].Name, output.Partials[output.CachingObjects[i].Index]); partials.Add(new Tuple&lt;string, int&gt;(output.CachingObjects[i].Name, output.CachingObjects[i].Index)); } dic.Add(name, partials.OrderBy(x =&gt; x.Item2).ToList()); PutFileList(dic); } else { DataCache.Add(name, file); } } public static void Remove(string name) { var dic = GetFileList(); if (dic == null) { DataCache.Remove(name); return; } if (dic.ContainsKey(name)) { var list = dic[name]; for (int i = 0; i &lt; list.Count; i++) { DataCache.Remove(list[i].Item1); } dic.Remove(name); PutFileList(dic); } else { DataCache.Remove(name); } } private static void PutFileList(Dictionary&lt;string, List&lt;Tuple&lt;string, int&gt;&gt;&gt; input) { DataCache.Put(kFileListName, input); } private static Dictionary&lt;string, List&lt;Tuple&lt;string, int&gt;&gt;&gt; GetFileList() { return DataCache.Get(kFileListName) as Dictionary&lt;string, List&lt;Tuple&lt;string, int&gt;&gt;&gt;; } } </code></pre> <p>Aaaand two classes used for data holders</p> <pre><code> public class CachingObjectHolder { public readonly List&lt;byte[]&gt; Partials; public readonly List&lt;CachingObject&gt; CachingObjects; public readonly string CacheName; public CachingObjectHolder(string name, List&lt;byte[]&gt; partialList) { Partials = partialList; CacheName = name; CachingObjects = new List&lt;CachingObject&gt;(); CreateCachingObjects(); } private void CreateCachingObjects() { for (int i = 0; i &lt; Partials.Count; i++) { CachingObjects.Add(new CachingObject(string.Format("{0}_{1}", CacheName, i), i)); } } } public class CachingObject { public int Index { get; set; } public string Name { get; set; } public CachingObject(string name, int index) { Index = index; Name = name; } } </code></pre> <p>Here are the results from testing the solution on the cloud. The R/W times are in ms. <img src="https://i.stack.imgur.com/Spsq8.png" alt="Results from live testing"></p>
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    1. COI will run a performance test on the cloud and keep you informed how fast this is.
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    2. COThe results from the live testing is complete and edited into the answer.
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