Samba Multi-Channel/io_uring Status Update

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Publish Date: 
Wednesday, September 29, 2021
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Abstract: 

Samba had experimental support for multi-channel for quite a while. SMB3 has a few concepts to replay requests safely. We now implement them completely (and in parts better than a Windows Server). The talk will explain how we implemented the missing features. With the increasing amount of network throughput, we'll reach a point where a data copies are too much for a single cpu core to handle. This talk gives an overview about how the io_uring infrastructure of the Linux kernel could be used in order to avoid copying data, as well as spreading the load between cpu cores. A prototype for this exists and shows excellent results.

  • What the current implementation status is
  • How the proposed design looks like
  • How to improve performance

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