![]() Writer = new StreamWriter(Path.Combine(, fileName), true) Ĭ = Encoding. Using (var fs = new FileStream(Path.Combine(, $"resources\\code_[.csv" Long chunkLength = 10 * 1024 //divide blob file into each file with 10KB in sizeįor (long i = 0 i blobTotalLength ? blobTotalLength : (i chunkLength) Var blob = container.GetBlockBlobReference("code.txt") Program Main var container = storageAccount.CreateCloudBlobClient().GetContainerReference(defaultContainerName) OutPutStream.Write(bytes, 0, bytes.Length) OutPutStream.Position = queue.Key- startRange Queues.Enqueue(new KeyValuePair(offset, chunkLength)) īlob.DownloadRangeToStream(ms, queue.Key, queue.Value) Long chunkLength = (long)Math.Min(bufferLength, blobRemainingLength) Long blobRemainingLength = endRange-startRange Int bufferLength = 1 * 1024 * 1024 //1 MB chunk for download This is because the function saves the changes and appends them to the file. Every time you hit Save in an application, you end up with a usually bigger file size. ParallelDownloadBlob private static void ParallelDownloadBlob(Stream outPutStream, CloudBlockBlob blob,long startRange,long endRange) This is a good place to start to cutting down the bloat. Here is my code snippet, you could refer to it: Per my understanding, you could break your blob file into your expected pieces (100MB), then leverage CloudBlockBlob.DownloadRangeToStream to download each of your chunks of files. Using (var fs = new FileStream(file, FileMode.Open))//Open that fileįs.Position = currentPointer //Move the cursor to the end of file.įs.Write(contents, 0, contents.Length) //Write the contents to the end of file.ĬurrentPointer = contents.Length //Update pointerīytesRemaining -= contents.Length //Update bytes to fetchĬonsole.WriteLine(fileName dateTimeStamp ".csv " (startPosition / 1024 / 1024) "/" ( / 1024 / 1024) " MB downloaded.") Using (MemoryStream ms = new MemoryStream())īlob.DownloadRangeToStream(ms, currentPointer, bytesToFetch, null, blobRequestOptions) Var bytesToFetch = Math.Min(blockSize, bytesRemaining) MaximumExecutionTime = TimeSpan.FromMinutes(60), RetryPolicy = new ExponentialRetry(TimeSpan.FromSeconds(5), 3), Var blobRequestOptions = new BlobRequestOptions Using (FileStream fs = new FileStream(file, FileMode.Create))//Create empty file. Long blockSize = (1 * 1024 * 1024) //1 MB chunk īlockSize = Math.Min(blobSize, blockSize) We use this to create an empty file with size = blob's size Var blob = container.GetBlockBlobReference(file) Var container = blobClient.GetContainerReference(containerName) Var blobClient = account.CreateCloudBlobClient() Update: Here is my code CloudStorageAccount account = CloudStorageAccount.Parse(connectionString) I currently have this code from Azure download blob partīut I cannot figure out how to stop downloading when the file size is already 100MB and create a new one. I do not need to re-combine those files again. Requirement is to split into 100MB chunks and append a number into the filename. I have a 2GB file in blob storage and am building a console application that will download this file into a desktop.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |