Solaris Multiplexed I/O

Solaris Multiplexed I/O

Solaris Multiplexed I/O (MPxIO), known also as Sun StorageTek Traffic Manager (SSTM) (and earlier, Sun StorEdge Traffic Manager), is software integrated within the Solaris OS beginning in February 2000 with Solaris 8 release that enables a storage device to be accessed through multiple host controller interfaces from a single operating system instance.The MPxIO architecture helps protect against I/O outages due to I/O controller failures. Should one I/O controller fail, MPxIO automatically switches to an alternate controller.

This architecture also increases I/O performance by load balancing across multiple I/O channels.

The file to enable or disable mpxio has been moved in Solaris 10 from "/kernel/drv/scsi_vhci.conf" to the bottom of the file "/kernel/drv/fp.conf" and "/kernel/drv/mpt.conf"

ee also

* Multipath I/O
* stmsboot command line utility

External links

* [http://docs.sun.com/source/817-3951-12/chp5.html#55054 Brief mention of MPxIO in Sun Fire V490 document]
* [http://www.sun.com/storagetek/management_software/resource_management/traffic_manager/ Sun StorageTek Traffic Manager Software]


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