VERITAS Foundation Suite for AIX:系统管理员指南

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"Introducing VERITAS Foundation Suite for AIX" 本文档主要介绍了VERITAS Foundation Suite在AIX操作系统上的应用,旨在帮助系统管理员熟悉在AIX环境下如何使用该套件,同时也为那些对其他UNIX平台上的VERITAS Foundation Suite有经验的管理员提供指导。文档内容包括VERITAS Foundation Suite的基本定义、IBM与VERITAS的关系、VERITAS在AIX Bonus Pack中的角色、使用VERITAS Foundation Suite的理由以及对AIX原生LVM(逻辑卷管理器)和JFS(日志文件系统)的支持。 1. **VERITAS Foundation Suite for AIX**:这是一个全面的存储管理和数据保护解决方案,它提供了一整套工具和服务,用于管理AIX环境下的存储资源,包括备份、恢复、集群服务、存储虚拟化和性能优化等功能。它有助于提高系统的可用性和效率,确保关键业务的连续运行。 2. **IBM-VERITAS关系**:IBM和VERITAS(现为Symantec的一部分)的合作关系表明了两家公司在企业级存储解决方案领域的紧密合作。VERITAS Foundation Suite与IBM的AIX操作系统兼容,为客户提供了一种强大的、集成的存储管理解决方案。 3. **VERITAS Foundation Suite on the AIX Bonus Pack**:AIX Bonus Pack是IBM为AIX用户提供的额外软件包,其中包含了VERITAS Foundation Suite的一些组件。这些组件可以增强AIX系统的功能,提供更高级别的数据管理和保护。 4. **为何使用VERITAS Foundation Suite on AIX**:使用VERITAS Foundation Suite的主要好处包括其对企业级存储的全面管理能力,对LVM和JFS的兼容性,以及提供高可用性和灾难恢复方案。这使得AIX系统能够更好地应对复杂的企业级工作负载和数据保护需求。 5. **支持LVM和JFS for AIX**:VERITAS Foundation Suite不仅支持AIX的本地LVM,还提供了更高级的特性,如动态扩展卷、快照等。同时,它也支持JFS和JFS2,这两种文件系统在AIX中广泛用于提供日志记录和高性能的数据访问。 6. **与其他平台的比较**:文档中可能会对比VERITAS Foundation Suite在AIX和Sun Solaris上的差异,以帮助用户理解在不同平台上的使用体验和优势。 7. **迁移提示**:文档会提供从现有环境迁移到AIX环境的技巧和建议,这对于已经在其他UNIX系统上使用VERITAS Foundation Suite的管理员来说是非常有价值的。 总而言之,"Introducing VERITAS Foundation Suite for AIX" 是一本面向AIX系统管理员的重要参考资料,它详尽地解释了如何利用VERITAS Foundation Suite来优化和保护AIX环境中的数据存储,并提供了与IBM AIX系统原生工具的集成策略。

For macroscopically anisotropic media in which the variations in the phase stiffness tensor are small, formal solutions to the boundary-value problem have been developed in the form of perturbation series (Dederichs and Zeller, 1973; Gubernatis and Krumhansl, 1975 ; Willis, 1981). Due to the nature of the integral operator, one must contend with conditionally convergent integrals. One approach to this problem is to carry out a “renormalization” procedure which amounts to identifying physically what the conditionally convergent terms ought to contribute and replacing them by convergent terms that make this contribution (McCoy, 1979). For the special case of macroscopically isotropic media, the first few terms of this perturbation expansion have been explicitly given in terms of certain statistical correlation functions for both three-dimensional media (Beran and Molyneux, 1966 ; Milton and Phan-Thien, 1982) and two-dimensional media (Silnutzer, 1972 ; Milton, 1982). A drawback of all of these classical perturbation expansions is that they are only valid for media in which the moduli of the phases are nearly the same, albeit applicable for arbitrary volume fractions. In this paper we develop new, exact perturbation expansions for the effective stiffness tensor of macroscopically anisotropic composite media consisting of two isotropic phases by introducing an integral equation for the so-called “cavity” strain field. The expansions are not formal but rather the nth-order tensor coefficients are given explicitly in terms of integrals over products of certain tensor fields and a determinant involving n-point statistical correlation functions that render the integrals absolutely convergent in the infinite-volume limit. Thus, no renormalization analysis is required because the procedure used to solve the integral equation systematically leads to absolutely convergent integrals. Another useful feature of the expansions is that they converge rapidly for a class of dispersions for all volume fractions, even when the phase moduli differ significantly.

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