Recovery of 640 MB of log data recovered by RAMCloud 35d8b. All cases are using an in-memory replica unless the legend hints otherwise.
Left to right the dots correspond to 8192, 4096, 2048, 1024, 512, 256, and 128 B objects.
RPC Count: RPCs during recovery for 1 backup is almost exactly 5 * segment count ignoring RPCs for client tablet map refreshes (80 segments here so 400 RPCs).
MasterServer::recoverSegment Performance
rabinpoly was discovered to be far too slow to use as our checksum (it added 5-10 seconds to recovery time). The attached graph demonstrates the overheads of various checksum routines on a 640MB (80x8MB segment) invocation of recoverSegment as simulated in the RecoverSegmentBenchmark application.