境，并支持绝大多数的主流硬件网络。作为一款高性能数据库系统，TiDB 支持主流的 Linux 操作系统环境。 Linux 操作系统平台 版本 Red Hat Enterprise Linux 7.3 及以上 CentOS 7.3 及以上 Oracle Enterprise Linux 7.3 及以上 Ubuntu LTS 16.04 及以上 注： TiDB 只支持 Red Hat 兼容内核 (RHCK) 的 Oracle 变更组件配置 集群扩容缩容 升级组件版本 清除集群数据 销毁集群 1. 部署目标机器若干 建议 4 台及以上，TiKV 至少 3 实例，且与 TiDB、PD 模块不位于同一主机，详见部署建议。 推荐安装 CentOS 7.3 及以上版本 Linux 操作系统，x86_64 架构 (amd64)。 机器之间内网互通。 注：使用 Ansible 方式部署时，TiKV 及 PD 节点数据目录所在磁盘请使用 SSD 部署方案单机进行测试。 2. 部署中控机一台: 中控机可以是部署目标机器中的某一台。 推荐安装 CentOS 7.3 及以上版本 Linux 操作系统（默认包含 Python 2.7）。 该机器需开放外网访问，用于下载 TiDB 及相关软件安装包。 以 root 用户登录中控机 如果中控机是 CentOS 7 系统，执行以下命令： 1. # yum -y install epel-release

to choose the correct kernel-devel package when asked by the installer (use uname -a to compare). CentOS, Red Hat Enterprise Linux and Oracle Enterprise Linux 1. For versions prior to 6, add divider=10 (RHEL) as of release 4.7 and 5.1 as well as kernels of related Linux distributions (for instance CentOS and Oracle Enterprise Linux) support a kernel parameter divider=N. Hence, such kernels support a it might be overridden by *iocharset* mount option. 204 15 Change log • Linux Additions: RHEL/OEL/CentOS 6.4 compile fix (bug #11586) • Linux Additions: Debian Linux kernel 3.2.0-4 (3.2.39) compile fix

kernel-devel package when asked by the installer (use uname -a to compare). 66 4 Guest Additions CentOS, Red Hat Enterprise Linux and Oracle Enterprise Linux 1. For versions prior to 6, add divider=10 (RHEL) as of release 4.7 and 5.1 as well as kernels of related Linux distributions (for instance CentOS and Oracle Enterprise Linux) support a kernel parameter divider=N. Hence, such kernels support a fall-back to VESA driver on RedHat-based guests if vboxvideo cannot be loaded • Linux Additions: RHEL/OEL/CentOS 6.4 compile fix (bug #11586) • Linux Additions: Debian Linux kernel 3.2.0-4 (3.2.39) compile fix

installer (use uname -a to compare). 67 4 Guest Additions Oracle Linux, Red Hat Enterprise Linux and CentOS 1. For versions prior to 6, add divider=10 to the kernel boot options in /etc/grub.conf to reduce (RHEL) as of release 4.7 and 5.1 as well as kernels of related Linux distributions (for instance CentOS and Oracle Linux) support a kernel parameter divider=N. Hence, such kernels support a lower timer fall-back to VESA driver on RedHat-based guests if vboxvideo cannot be loaded • Linux Additions: RHEL/OEL/CentOS 6.4 compile fix (bug #11586) • Linux Additions: Debian Linux kernel 3.2.0-4 (3.2.39) compile fix

Clup管理界面-在Web界面中管理数据库-9- @ PolarDB环境准备创建PolarDB的要求  安装要求 需要有共享盘：盘的大小需要大于等于20GB CLup的高可用需要VIP 操作系统：CentOS7.X 盘要求有路径：/dev/nvmeXnY  机器需求 4台虚拟机器或物理机 1台做CLup管理节点：内存大于2GB 3台做数据库节点：内存需要大于4GB，最好有反亲和性，即能分布在不同的

(RHEL) as of release 4.7 and 5.1 as well as kernels of related Linux distributions (for instance CentOS and Oracle Linux) support a kernel parameter divider=N. Hence, such kernels support a lower timer mouse cursor visibility updating • Linux guests: VBox Guest Additions fail to compile on Red Hat/CentOS/OL 7.7 and Red Hat 8.1 Beta (bug #18917) • Linux guests: improve compatibility of vboxvideo.ko kernel

(RHEL) as of release 4.7 and 5.1 as well as kernels of related Linux distributions (for instance CentOS and Oracle Linux) support a kernel parameter divider=N. Hence, such kernels support a lower timer