5A

精心整理了2020年全国共计280处5A级景区名录，包含景区名称、所在省份及授予年份等详细信息。数据格式为JSON，适用于数据库基础数据构建及上层应用，支持NoSQL数据库直接导入，SQL数据库需自行进行结构转换。

Oracle 11.2 RAC (Real Application Clusters) is an advanced feature of Oracle databases that allows multiple instances to share a single physical database, ensuring high availability and load balancing. Setting up Oracle 11.2 RAC on Linux 5 requires several key steps, including system configuration, user and permission management, Network Time Protocol (NTP) configuration, resource limit adjustments, and kernel parameter optimization. Below is a structured breakdown of these steps: Memory Requirements: To maintain stable operation, each host must have at least 1.5GB of memory. This baseline ensures that the Oracle database instance functions efficiently, especially in a cluster environment where additional resources handle cluster communication and failover. User and Group Creation: Before deploying RAC, create dedicated users and groups. We create two groups: oinstall and dba, and two users: grid and oracle. The grid user manages Grid Infrastructure, while oracle is the database instance owner. Proper user and permission settings are essential for security and operational accuracy. Installation Directory Creation: Each RAC node requires directories for Oracle software, Grid Infrastructure, and Cluster Resource Software (CRS). For example, /u01/app/11.2.0/grid and /u01/app/oracle are designated for Grid Infrastructure and database instances, with grid and oracle as respective owners, and oinstall as the group. NTP Service Configuration: Synchronizing time across all cluster nodes is crucial since database operations rely on precise timestamps. Edit /etc/ntp.conf on RAC1 to set restrictions, and use the ntpdate command with cron jobs on RAC2 for regular time updates. Start NTP on RAC1, and set up a scheduled task on RAC2 to ensure consistency. System Limits Adjustment: Configure /etc/security/limits.conf for oracle and grid users, setting soft and hard limits, including maximum open processes (nproc) and file descriptors (nofile). These adjustments boost Oracle RAC's performance and concurrency. Kernel Parameter Optimization: Optimize system kernel parameters within /etc/sysctl.conf, ensuring efficient utilization of resources and enhancing database performance.

这份附件是关于数据挖掘工具WEKA 3-5-5 Explorer的用户指南，为您提供便利。

欢迎使用Xshell5。安装此程序，即可获得无限制使用功能。

《MySQL 5 权威指南》深入讲解 MySQL 功能，涵盖 MySQL、PHP、Apache、Perl 等组件安装与功能概述，mysql 等系统管理工具及用户操作界面使用方法，MySQL 数据库系统设计基础知识，以及使用不同语言设计 MySQL 数据库的过程。此外，本书还提供 SQL 语法、工具、选项、API 应用指南，助力读者最大限度地利用 MySQL。

本指南介绍了 MySQL 5.7 的第五部分内容，包括安装、配置、优化和管理方面的详细说明。

用例1参数：- 路径文件序列- 类的位置（-1为最后一个）- 路径文件开发- 将创建cls的路径输出：具有最佳选择的cls 用例2参数：- 路径cls（分类器）- 路径文件测试- 输出文件路径输出：带类的文件

这是 SYBASE Adaptive Server Enterprise 12.5.2 for NT 的第五个部分。

Weka 是一款专业数据挖掘软件，集合了丰富的机器学习算法，涵盖数据预处理、分类、回归、聚类、关联规则等功能，并提供交互式界面进行可视化。

该文件提供了 MD5 计算功能，如需使用，请自行下载体验其功能。