Arvados

We should even more strongly discourage the use of Serialize: True since it will almost always cause lower performance given request reordering in both the drive and operating system.

https://doc.arvados.org/install/configure-fs-storage.html
https://en.wikipedia.org/wiki/Tagged_Command_Queuing
https://en.wikipedia.org/wiki/Native_Command_Queuing
https://en.wikipedia.org/wiki/Advanced_Host_Controller_Interface

Current text:

  # When true, read and write operations (for whole 64MiB blocks) on
  # an individual volume will queued and issued serially.  When
  # false, read and write operations will be issued concurrently.
  #
  # May improve throughput if you experience contention when there are
  # multiple requests to the same volume.
  #
  # When using SSDs, RAID, or a parallel network filesystem, you probably
  # don't want this.
  Serialize: false