I'm interested in multi-path IO in the linux scsi mid-layer.
Are there developers working on changes to the scsi layers/interfaces?
I've seen references about such work, but no details.
Anyone else interested in or working on multi-path IO in the mid-layer?
I've looked at the code as to what changes might be required, and did
a simple prototype to issue IO requests using multiple paths for one device -
configuring one device in with multiple paths using SCSI INQUIRY page 0x83,
and selecting a path (just round-robin) at scsi_submit_cmd() time.
But, a decent multi-path IO implementation requires significant changes
to the current linux scsi interfaces/structures - especially where no
functional interfaces exist, such as the direct references to Scsi_Device
host, and Scsi_Host host_queue.
-- Patrick Mansfield patman@sequent.com patman@us.ibm.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/