Parallel Processing Letters, Volume 17, Number 1, March, 2007, pages 103-123.
Additionally, you can grab the original technical report, or the DSN conference paper.
This paper attempts to illuminate the practical considerations of LDPC codes for peer-to-peer and distributed storage systems. The three main types of LDPC codes are detailed, and a huge variety of codes are generated, then analyzed using simulation. This analysis focuses on the performance of individual codes for finite systems, and addresses several important heretofore unanswered questions about employing LDPC codes in real-world systems.
Keywords: Erasure codes, storage systems, fault-tolerance, peer-to-peer, low-density parity (LDPC) codes, Tornado codes.
.article pt:07:ldpc author J. S. Plank and M. G. Thomason title An Exploration of Non-Asymptotic Low-Density, Parity Check Erasure Codes for Wide-Area Storage Applications journal Parallel Processing Letters month March year 2007 volume 17 number 1 publisher World Scientific pages 103-123 where http://web.eecs.utk.edu/~jplank/plank/papers/PPL-07.html
@ARTICLE{pt:07:ldpc, author = "J. S. Plank and M. G. Thomason", title = "An Exploration of Non-Asymptotic Low-Density, Parity Check Erasure Codes for Wide-Area Storage Applications", journal = "Parallel Processing Letters", month = "March", year = "2007", volume = "17", number = "1", publisher = "World Scientific", pages = "103-123", where = "http://web.eecs.utk.edu/~jplank/plank/papers/PPL-07.html" }