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TPT-RAID: a High Performance Box-Fault Tolerant Storage System

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2 Author(s)
Birk, Y. ; Technion - Israel Inst. of Technol., Haifa ; Zilber, E.

TPT-RAID is a multi-box RAID wherein each ECC group comprises at most one block from any given storage box, and can thus tolerate a box failure. It extends the idea of an out-of band SAN controller into the RAID: data is sent directly between hosts and targets and among targets, and the RAID controller supervises ECC calculation by the targets. By preventing a communication bottleneck in the controller, excellent scalability is achieved while retaining the simplicity of centralized control. TPT-RAID, whose controller can be a software module within an out-of-band SAN controller, moreover conforms to a conventional switched network architecture, whereas an in-band RAID controller would either constitute a communication bottleneck or would have to also be a full-fledged router. The design is validated in an InfiniBand-based prototype using /SCSI and /SER, and required changes to relevant protocols are introduced.

Published in:

Mass Storage Systems and Technologies, 2007. MSST 2007. 24th IEEE Conference on

Date of Conference:

24-27 Sept. 2007

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