24. ? JVM："Use CLOCK_MONOTONIC_RAW for
nanoTime if available on Linux" 该patch用于更合
理的处理时间跳变问题
? HADOOP:
libhdfs implementation of hsync API
Set daemon for HttpServer's QueuedThreadPool
Add ability to reset topologies on master nodes
Slow RPC can prevent metrics collection on DNs
...
DTCC2013
25. ? HBASE:
optimize hfile index
parallel seek in StoreScanner
key range hints
tweak in-memory evict algorithm
reverse scan
...
DTCC2013
