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lecture: MARS: Replicating Petabytes over Long Distances


MARS Light is a kernel-level asynchronous block replication for long distances, supporting disaster recovery / georedundancy.

At 1&1 Internet SE, it has proven reliable for a total of more than 3 millions of operation hours, running on more than 700 centralized storage servers, continuously replicating several petabytes of data.

This talk will explain why long distance replication should be done at block level, and explain the differences to DRBD. Some newer MARS
features like socket bundling / transparent data compression will be presented with performance results.