| M. Nelson, Y. Khalidi, and P. Madany. The spring file system. Technical report, Sun Microsystems Research, February 1993. |
....It collects arbitrary system information (metadata) at any 3 granularity, allowing file system components to modify behavior according to any chosen characteristic of the system. Extensibility in file systems has been previously addressed by object oriented operating systems such as Spring [Nel93] and Choices [Cam87] File system components are represented as objects that can be replaced or extended through interface inheritance. In this manner, the file system can be configured appropriately for its environment. LegionFS is object based, and also allows classes of file objects to be ....
Nelson, Michael, Yousef Khalidi, Peter Madany. The Spring File System. Sun Microsystems Research, Technical Reports, TR-93-10, February 1993.
....and may be mounted atop another layer to form a stack. The Spring [32] object oriented operating system is composed of cooperating servers running on a micro kernel. File objects inherit from Spring interfaces charged with handling operations such as paging, authentication, consistency, and I O [33]. A new file system is allocated by contacting its corresponding creator object. This file system may be stacked on an existing file system by means of a stackon method [23] Subsequent work on the Solaris MC File System [30] replaces the vnode interface with a new interface defined in CORBA IDL. ....
M. Nelson, Y. Khalidi, and P. Madany. The spring file system. Technical report, Sun Microsystems Research, February 1993.
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