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% Registration Linux Multipathing
% [2]Register/Submit Proposal Ed Goggin (egoggin@emc.com)
Linux multipathing provides I/O failover and
path load sharing for multipathed block
devices. In this paper, we provide an overview
of the current device mapper based
multipathing capability and use authentic
customer configurations to drive Enterprise
level requirements for future multipathing
enhancements. We describe the interaction
amongst kernel multipathing modules, user mode
multipathing tools, hotplug, udev, and kpartx
components when considering use cases. Use
cases include path and logical unit
re-configuration, partition management, and
path failover for both active-active and
active-passive generic storage systems. We
also describe lessons learned during testing
the MD scheme on high end storage systems.
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