logstash/logstash — pull request #320 by piavlo (2013-01-17 13:13:46+00:00)
Title: redis input piplined and eval batched requests support

Added :batch_size option for doing a batched lpop by EVAL lua script
and :pipeline_size option for pipelining , in case :batch_size > 1 each pipelined request will use EVAL

EVAL makes sense over PIPELINE in bursty traffic workload
and in tests some combinations of EVAL + PIPELINE showed a bit better performance than
just EVAL or just PIPELINE