Master-slave expander logging

摘要

The invention provides a data storage topology that includes a master logging node where the event logs for all of the nodes may be stored on a consolidated basis. The master logging node is configured with a sufficient amount of reserved or additional data storage to accommodate the event logging requirement for the entire data storage topology. The other expanders in the topology may remain at a baseline model. The master logging medium may be an inexpensive persistent storage, such as a flash chip or USB key. The master logging expander may pull the event logs and other information from the remote expanders or, alternatively, the remote expanders may push their event logs and other information to the master logging node. In particular embodiments, the pull or push configuration may be implemented through preexisting SAS protocols.

主权项

1. A master-slave event logging system for a data storage topology, comprising:
a plurality data storage expanders, each connected to a respective plurality of data storage devices; a first one of the data storage expanders configured as a master logging node with a master logging medium operative for storing a master event log comprising event logs for the plurality data storage expanders; and a second one of the data storage expanders configured as a slave node operative for transmitting its slave event log to the master logging node where it is stored as part of the master event log, wherein the slave node is operative to push the slave event log to master logging node.