Split up the inbounding stream into multiple streams that can be read concurrently.
using (var inputSplitStream = new ReadableSplitStream(inputSourceStream))
using (var inputFileStream = inputSplitStream.GetForwardReadOnlyStream())
using (var outputFileStream = File.OpenWrite("MyFileOnAnyFilestore.bin"))
using (var inputSha1Stream = inputSplitStream.GetForwardReadOnlyStream())
using (var outputSha1Stream = SHA1.Create())
{
inputSplitStream.StartReadAhead();
Parallel.Invoke(
() => {
var bytes = outputSha1Stream.ComputeHash(inputSha1Stream);
var checksumSha1 = string.Join("", bytes.Select(x => x.ToString("x")));
},
() => {
inputFileStream.CopyTo(outputFileStream);
},
);
}
This example shows how 1 stream is read by 2 in parallel, and you can of cause have many more in parallel if needed.
So whenever a new stream is needed simply call GetForwardReadOnlyStream() on the ReadableSplitStream.
Please notice that the party starts when StartReadAhead() is called, else....
PM> Install-Package MicroKnights.IO.SplitStream -Version 1.0.0