title: What is the default chunk size used when uploading blobs using the Azure CLI, and can this be changed?
body: <p>I am using the Azure Command Line Interface <code>az</code> command to upload data to an Azure storage account:</p>
  <pre><code>az storage blob upload ...
  </code></pre>
  <p>I note the <a href="https://docs.microsoft.com/en-us/cli/azure/storage/blob?view=azure-cli-latest" rel="nofollow noreferrer">documentation</a> refers to &quot;automatic chunking&quot;:</p>
  <blockquote>
  <p>Upload a file to a storage blob.</p>
  <p>Creates a new blob from a file path, or updates the content of an
  existing blob with automatic chunking and progress notifications.</p>
  </blockquote>
  <p>What chunk size is used? Is it a fixed size or does it depend on other factors?</p>
  <p>I would like to increase the chunk size to as large a value as possible, so that I can minimize Write Operation costs when uploading large files. Is this possible using the CLI tools?</p>