NewSimpleDifferenceRank Create a SimpleDifferenceRank instance.

1/N * 2, N = 20, backups per lambda.

Reuse StorageOverhead.

1 second.

100 MB.

StorageSignalFlagForceCommit Indicate a PersistentStorage to commit regardless of any queued operations.

Errors.

To minimize lineage recovery latency, try download the same file with multiple contenders.

SimpleDifferenceRankSignificanceRatio diffrank parameter.

Updated: 6/30/2010 Try download as few as lineage file in batch: try one snapshot each term.

Storage with lineage.

PersistentStorage Storage with S3 as persistent layer.

SimpleDifferenceRank only count the number of object stored.

Storage with lineage.

LineageDifferenceRank Metric used to decide if a fast recovery should be requested.