优化Sun硬件上的Oracle Solaris 8 NFS服务器性能与调优指南

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Oracle Solaris 8 NFS Server Performance and Tuning Guide for Sun 是一份针对Sun硬件的文档，旨在提供详细的指导，帮助用户优化和提升Oracle Solaris 8网络文件系统(NFS)服务器的性能。这份2000年修订版A的文档，编号为806-2195-10，发表于二月，由Sun Microsystems, Inc.编写，地址位于美国加利福尼亚州帕洛阿尔托。文档内容涵盖了关于NFS服务器在Sun硬件环境中的最佳实践、配置调整、故障排查以及性能调优策略。它可能包括对NFS协议的理解，如如何管理共享目录，如何设置缓存和数据块大小，以及如何处理网络延迟、带宽限制等因素对性能的影响。此外，还可能讨论了磁盘I/O优化、负载均衡和安全设置等方面，这些都是确保NFS服务器高效运行的关键要素。对于那些希望通过改进NFS服务器性能来提升整个网络环境效率的管理员和技术人员，这份指南提供了实用的工具和技术，包括性能监控工具的使用方法，以及如何根据实际需求调整服务器参数，如NFS版本选择、超时设置、日志记录等。版权方面，Sun Microsystems强调所有内容受版权保护，并且在复制、分发或逆向工程方面都必须获得书面授权。部分产品可能基于Berkeley BSD系统，而UNIX是注册商标，通过X/Open Company Ltd进行独家许可。对于Netscape Communicator™，文档中包含相应的版权声明。 Oracle Solaris 8 NFS Server Performance and Tuning Guide for Sun是一份实用的参考资料，适合那些寻求提高Oracle Solaris 8 NFS服务器性能，以及对系统架构有深入了解的IT专业人员参考和学习。通过阅读和遵循这份指南，读者可以提升系统的稳定性和整体工作效率。

xvi NFS Server Performance and Tuning Guide for Sun Hardware • February 2000

4 NFS Server Performance and Tuning Guide for Sun Hardware • February 2000

Changes in Version 3 From Version 2

The root and writecache operations have been removed. A mknod operation has

been defined to allow the creation of special files, thus eliminating the overloading

of create. Caching on the client is not defined nor dictated by version 3.

Additional information and hints have been added to version 3 to allow clieints that

implement caching to manage their caches more effectively.

Operations that affect the attributes of a file or directory may now return the new

attributes after the operation has completed to optimize out a subsequent getattr

used in validating attribute caches. Also, operations that modify the directory in

which the target object resides return the old and new attribues of the directory to

allow clients to implement more intelligent cache invalidation procedures.

The access operation provides access permission checking on the server. The

fsstat operation returns static information about a file system and server. The

readdirplus operation returns file handles and attributes in additional to directory

entries. The pathconf operation returns POSIX path configuration information

about a file.

64-Bit File Size

Version 3 of the NFS protocol enables access to files whose length fits in 64 bits.

With version 2, the length had to fit in 32 bits (4 Gbytes).

Access to large files (64-bit) is possible only if the client, server, and the operating

system support large files. If the client implementation is limited to 32-bit files, then

the client can’t access files larger than 32 bits (even if the server supports them).

Conversely, if the client supports 64-bit files but the server only supports 32-bit files,

the client is limited to 32-bit files. The Solaris 7 operating environment is the first

Solaris release that takes advantage of this protocol feature. Operating

environments prior to Solaris 7 did not have 64-bit file support.

The limit for the UNIX® File System in the Solaris 2.6, 7, and 8 operating

environments is 1 Terrabyte (40 bits).

readdirplus Extends read from directory.

fsinfo Gets static file system information.

pathconf Retrieves POSIX information.

commit Commits cached data on a server to stable storages

TABLE 1-2 New NFS Operations in Version 3

Operation in Version 3 Function

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