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Replication has been widely used to ensure the data availability in a distributed file system. In recent years, erasure coding (EC) has been adopted to overcome the problem of space efficiency in Replication. However, EC has various performance degrading factors such as parity calculation and degraded input/output. In particular, the recovery performance of EC is degraded because of various factors...
With the increasing demand for mass storage, research on exa-scale storage is actively underway. When the scale of storage grows to the exa-scale, the space efficiency becomes very important. To maintain the storage reliability and improve the space efficiency, we have begun to introduce erasure coding instead of replication. However, erasure coding has many I/O performance degradation factors such...
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