. . . . . . . . . . . . . . . . . . . . . . . . . . 169 9.8.4 Data file recovery and forensic analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 9.8.5 Splitting a large . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 12.4 Static code analysis tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 9.24 List of packages for data file recovery and forensic analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 9.25 List of data encryption utilities

of log management. The next step is to analyze this information to produce useful statistics. Log analysis in general is beyond the scope of this document, and not really part of the job of the web server server itself. For more information about this topic, and for applications which perform log analysis, check the Open Directory9 or Yahoo10. Various versions of Apache httpd have used other modules and directives Format (CLF). This standard format can be produced by many different web servers and read by many log analysis programs. The log file entries produced in CLF will look something like this: 127.0.0.1 - frank

高可用，快照任务中断自动拉起继续转储快照和克隆的特点 • 克隆的定义 • 克隆是指从卷复制出卷的功能，提供快速的复制卷的能力。 • 这里的克隆还包括从快照回滚的功能 • 克隆的特点 • 支持Lazy和非Lazy两种模式克隆 • 支持从快照克隆和从镜像（卷）克隆 • 支持从快照回滚 • 高可用，克隆任务中断自动拉起继续克隆快照克隆服务器架构 • 基于brpc提供restful API的对外http接口 元数据安装成功； • Lazy方式下可见，用户可用； • 非Lazy不可见。 MetaInstalled: • 数据拷贝完成； • 可提供所有服务。 Cloned:LAZY 克隆 Lazy克隆 较快，秒级克隆： MetaInstalled状态可用，即完成元数据安装，就 从临时目录rename，用户可见。 Lazy Alloc Chunk，利于超售： Lazy克隆不直接分配chunk，而是等到client来写 额外接口： 不进行数据复制，而是提供额外的Flatten接口， 完成数据复制。 适用场景： 适用于从镜像快速创建云主机场景 非Lazy克隆 较慢，分钟级： Cloned状态可用，即完成整个数据克隆，才从临 时目录rename，用户才可见。 无Lazy Alloc chunk： 安装元数据时即分配好chunk。 无额外接口： 无需Flatten接口。 适用场景： 适用于从云

of log management. The next step is to analyze this information to produce useful statistics. Log analysis in general is beyond the scope of this document, and not really part of the job of the web server server itself. For more information about this topic, and for applications which perform log analysis, check the Open Directory10 or Yahoo11. Various versions of Apache httpd have used other modules and directives Format (CLF). This standard format can be produced by many different web servers and read by many log analysis programs. The log file entries produced in CLF will look something like this: 127.0.0.1 - frank

客户端 Client 对元数据增删改查 对数据增删改查基本架构 • 快照克隆服务器 独立于核心服务 储到支持S3接口的 对象存储，不限制数量 异步快照、增量快照 从快照/镜像克隆 ( lazy/非lazy ) 从快照回滚数据组织形式 • 底层 可用性 / 可靠性 扩展性 / 负载均衡 向上提供无差别文件流 • Application 块/对象/EC等 感知具体格式 提供不同文件类型支撑不同上层应用数据组织形式 PageFile • 地址空间到—>chunk: 1 : N chunk有先后关系 • 创建时指定大小，lazy分配chunk • 提供4kb随机读写能力数据组织形式 • PageFile • 地址空间到—>chunk: 1 : N chunk有先后关系 • 创建时指定大小，lazy分配chunk • 提供4kb随机读写能力 • 支撑块设备应用场景 块设备层面的快照功能 即为文件层面快照数据组织形式

of log management. The next step is to analyze this information to produce useful statistics. Log analysis in general is beyond the scope of this document, and not really part of the job of the web server server itself. For more information about this topic, and for applications which perform log analysis, check the Open Directory or Yahoo. Various versions of Apache httpd have used other modules and directives Format (CLF). This standard format can be produced by many different web servers and read by many log analysis programs. The log file entries produced in CLF will look something like this: 127.0.0.1 - frank

of log management. The next step is to analyze this information to produce useful statistics. Log analysis in general is beyond the scope of this document, and not really part of the job of the web server server itself. For more information about this topic, and for applications which perform log analysis, check the Open Directory or Yahoo. Various versions of Apache httpd have used other modules and directives Format (CLF). This standard format can be produced by many different web servers and read by many log analysis programs. The log file entries produced in CLF will look something like this: 127.0.0.1 - frank

of log management. The next step is to analyze this information to produce useful statistics. Log analysis in general is beyond the scope of this document, and not really part of the job of the web server server itself. For more information about this topic, and for applications which perform log analysis, check the Open Directory or Yahoo. Various versions of Apache httpd have used other modules and directives Format (CLF). This standard format can be produced by many different web servers and read by many log analysis programs. The log file entries produced in CLF will look something like this: 127.0.0.1 - frank