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Configuring iptables
RHEL/CentOS/Oracle/Amazon Linux SLES Ubuntu Debian For Ambari to communicate during setup with the hosts it deploys to and manages, certain ports must be open and available. T... -
Christophe Dervieux
Christophe Dervieux is an active member of the R community, currently living in France. With a master’s degree in energy and economics, he started working with R as an analyst doi... -
Configure Postgres to Allow Remote Connections
About This Task Steps About This Task It is critical that you configure Postgres to allow remote connections before you deploy a cluster. If you do not perform these steps in ... -
About the Authors
Yihui typed out most of the words in this book, which is the only justification for him being the “first” author. Christophe has made substantial contribution to this book by help... -
任务实例
批量任务实例 实时任务实例 批量任务实例 点击项目管理->工作流->任务实例，进入任务实例页面，如下图所示，点击工作流实例名称，可跳转到工作流实例DAG图查看任务状态。 查看日志：点击操作列中的“查看日志”按钮，可以查看任务执行的日志情况。 实时任务实例 切换到实时任务实例页面，如下图所示： SavePoint：点击操作列... -
升级
我们建议在升级之前备份数据库和配置文件。通常情况下，我们保证升级不会影响现有数据。 备份数据意味着即使升级失败或者你不想使用高级版本，你也有回滚的选择。 Docker Compose 如果你使用 Docker Compose 安装 Answer，升级非常简单。 docker - compose pull docker - compose ... -
Configuring iptables
RHEL/CentOS/Oracle/Amazon Linux SLES Ubuntu Debian For Ambari to communicate during setup with the hosts it deploys to and manages, certain ports must be open and available. T... -
Fork Operator
Overview of the ForkOperator Using the ForkOperator Basics of Usage Per-Fork Configuration Failure Semantics Performance Tuning Comparison with PartitionedDataWriter Writing... -
Configure Postgres to Allow Remote Connections
About This Task Steps About This Task It is critical that you configure Postgres to allow remote connections before you deploy a cluster. If you do not perform these steps in a... -
第四章：线程安全问题
学习目标 1. 什么是线程安全 1.1 线程安全的定义 1.2 线程安全的重要性 2. 共享资源访问的竞态条件 2.1 什么是竞态条件 2.2 竞态条件示例 2.3 竞态条件的类型 读-改-写竞态条件 检查再执行竞态条件 3. 线程安全问题的表现形式 3.1 原子性问题 3.2 可见性问题 3.3 有序性问题 4. 实战案例：商品...
