Jerasure: A Library In C Facilitating Erasure Coding For Storage Applications

Transcript

This paper descibes version 2.0 of jerasure, a library in C that supports erasure coding in storage applications. In this paper, we describe both the techniques and algorithms, plus the interface to the code. Thus, this serves as a quasi-tutorial and a programmer’s guide. Version 2.0 does not change the interface of jerasure 1.2. What it does is change the software for doing the Galois Field back-end. It now uses GF-Complete, which is much more flexible and powerful than the previous Galois Field arithmetic library. In particular, it leverages Intel SIMD instructions so that Reed-Solomon coding may be blazingly fast. In order to use jerasure, you must first download and install GF-Complete. Both libraries are posted and main- tained at bitbucket.com.