January 2019
Intermediate to advanced
606 pages
15h 1m
English
book
Ceph: Designing and Implementing Scalable Storage Systems
by Michael Hackett, Vikhyat Umrao, Karan Singh, Nick Fisk
Content preview from Ceph: Designing and Implementing Scalable Storage Systems
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Jerasure
The default erasure plugin in Ceph is the Jerasure plugin, which is a highly optimized open source erasure coding library. The library has a number of different techniques that can be used to calculate the erasure codes. The default is Reed-Solomon and provides good performance on modern processors which can accelerate the instructions that the technique uses. Cauchy is another technique in the library; it is a good alternative to Reed- Solomon and tends to perform slightly better. As always, benchmarks should be conducted before storing any production data on an erasure-coded pool to identify which technique best suits your workload.
There are also a number of other techniques that can be used which all have a fixed number of
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