发布于 2016-05-07 00:01:22 | 257 次阅读 | 评论: 0 | 来源: 网友投递
Apache Storm 分布式实时计算系统
Apache Storm 的前身是 Twitter Storm 平台，目前已经归于 Apache 基金会管辖。Apache Storm 是一个免费开源的分布式实时计算系统。简化了流数据的可靠处理，像 Hadoop 一样实现实时批处理。Storm 很简单，可用于任意编程语言。Apache Storm 采用 Clojure 开发。
Apache Storm 1.0.1 发布了，这是一个维护版本，主要修复了一些重要的Bugs，提升性能、稳定性、以及容错能力。内部通信机制消息吞吐量是之前的一倍多，这使得任务间通信效率大大提升。
完整改进记录如下：
STORM-1741: remove unconditional setting of JAVA_HOME from storm-env.sh
STORM-1739: update the minor JAVA version dependency in 0.10.0 and above
STORM-1727: document 1.0 package renaming and how to use the migration tool
STORM-1733: Flush stdout and stderr before calling "os.execvp" to prevent log loss.
STORM-1729: Get rid of reflections while recording stats
STORM-1731: Avoid looking up debug / backpressure enable flags within critical path
STORM-1535: Make sure hdfs key tab login happens only once for multiple bolts/executors.
STORM-1725: Kafka Spout New Consumer API - KafkaSpoutRetryExponential Backoff method should use HashMap instead of TreeMap not to throw Exception
STORM-1544: Document Debug/Sampling of Topologies
STORM-1679: add storm Scheduler documents
STORM-1704: When logviewer_search.html opens daemon file, next search always show no result
STORM-1714: StatefulBolts ends up as normal bolts while using TopologyBuilder.setBolt without parallelism
STORM-1683: only check non-system streams by default
STORM-1680: Provide configuration to set min fetch size in KafkaSpout
STORM-1649: Optimize Kryo instaces creation in HBaseWindowsStore
STORM-1696: status not sync if zk fails in backpressure
STORM-1693: Move stats cleanup to executor shutdown
STORM-1585: Add DDL support for UDFs in storm-sql
STORM-1681: Bug in scheduling cyclic topologies when scheduling with RAS
STORM-1706: Add RELEASE and storm-env.sh to storm-diet assembly
STORM-1613: Upgraded HBase version to 1.1.0
STORM-1687: divide by zero in stats
下载地址：
http://storm.apache.org/downloads.html