kudu的副本数量是在表上设置,可以通过命令查看 # sudo -u kudu kudu cluster ksck $master ... Summary by table Name | RF | Status | Total Tablets | Healthy | Recovering | Under-replicated | Unavailable ----------------------------------------------------------+----+--------…
mapred.tasktracker.map.tasks.maximum 官方解释:The maximum number of map tasks that will be run simultaneously by a task tracker. 我的理解:一个tasktracker最多可以同时运行的map任务数量 默认值:2 优化值:mapred.tasktracker.map.tasks.maximum = cpu数量 cpu数量 = 服务器CPU总核数 / 每个CPU的核数服务器CPU…