Algorithms and profiles

There are a number of different erasure plugins you can use to create your erasure-coded pool.

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...