lxhjava的博客

待整理和完善。。。org.apache.druid.cli.Main --> CliBroker getModules()–> BrokerQueryResource.getQueryTargets()–> 1.List ServerViewUtil.getTargetLocations(BrokerServerView,datasource,interval,…) 获取segmentLocation, 2.ResourceIOReaderWriter.ok()读取segment

1.梳理druid预聚合逻辑摄取预聚合主逻辑：KafkaRecordSupplier.poll() --> IncrementalPublishingKafkaIndexTaskRunner.getRecords() --> SeekableStreamIndexTaskRunner.getRecords()--> StreamAppenderatorDriver.add(record) --> BaseAppenderatorDriver.append() --> ..

#若没有添加远程地址，则添加，取名如upgradegit remote add upgrade https://github.com/apache/druid.git拉取远程最新代码upgrade代码git fetch upgrade#查看修改文件状态信息git status添加修改且准备提交的文件git add filename1 filename2提交并注释git commit -m “upgrade”和并远程代码到本地mastergit merge upgrade/master