#167: try out Jerasure
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Reporter: zooko | Owner: zooko
Type: enhancement | Status: closed
Priority: minor | Milestone: undecided
Component: code-encoding | Version: 0.6.0
Resolution: fixed | Keywords:
Launchpad_bug: |
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Changes (by zooko):
* status: assigned => closed
* resolution: => fixed
Comment:
Prof. James Plank and co-authors (including me) did some good
investigation about comparative performance:
http://www.cs.utk.edu/~plank/plank/papers/FAST-2009.html
The upshot is that zfec is definitely fast enough, and is actually
competitive with the others in the sense of being consistently fast on
different machines and different K and M combinations. The paper doesn't
show graphs of numbers of check blocks (a.k.a. secondary shares) larger
than 4, but I think the alternatives get slower with larger numbers of
secondary shares faster than zfec gets slower. Also note that Jack Lloyd
has contributed some code for zfec to use SIMD when appropriate for even
better performance. Closing this as "fixed".
--
Ticket URL: <http://allmydata.org/trac/tahoe/ticket/167#comment:3>
tahoe-lafs <http://allmydata.org>
secure decentralized file storage grid
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