Beyond Block I/O: Implementing a Distributed Shared Log in Hardware
SYSTOR 2013 (the 6th International Systems and Storage Conference) |
Published by ACM
The basic block I/O interface used for interacting with storage devices hasn’t changed much in 30 years. With the advent of very fast I/O devices based on solid-state memory, it becomes increasingly attractive to make many devices directly and concurrently available to many clients. However, when multiple clients share media at ﬁne grain, retaining data consistency is problematic: SCSI, IDE, and their descendants don’t oﬀer much help. We propose an interface to networked storage that reduces an existing software implementation of a distributed shared log to hardware. Our system achieves both scalable throughput and strong consistency, while obtaining signiﬁcant beneﬁts in cost and power over the software implementation.
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