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Always Availability


Conventional High Availability (HA) systems always seem to be struggling to achieve higher reliability, approaching this goal as a limit. That's because they share a basic design flaw: the shared storage approach. An architecture that requires two systems to share a single storage system inherently creates several problems:




The Mirror File System uses a completely different approach.  It enables the nodes of a clustering system to be separated by hundreds miles or more, with each node freely accessing the files on its own storage system. Files and operations are mirrored, rather than shared, so when a file is updated on one node, the same file on the other node is also updated, in real time. When one node crashes or shuts down, the other node remains up and running. No disaster recovery procedure is needed, and the data remains Always Available. That is the point.



 

    


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