Messages in this thread | | | Date | Tue, 26 Jun 2001 11:00:40 -0700 | From | Patrick Mansfield <> | Subject | multi-path IO in SCSI mid-layer |
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Hi -
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/
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