摘要:
Devices and methods of providing hardware support for dynamic type checking are provided. In some embodiments, a processor includes a type check register and support for one or more checked load instructions. In some embodiments, normal load instructions are replaced by a compiler with the checked load instructions. In some embodiments, to perform a checked load, an error handler instruction location is stored in the type check register, and a type tag operand is compared to a type tag stored in the loaded memory location. If the comparison succeeds, execution may proceed normally. If the comparison fails, execution may be transferred to the error handler instruction. In some embodiments, type prediction is performed to determine whether a checked load instruction is likely to fail.
摘要:
A new and distinct Chrysanthemum plant named 92-296-25 is provided. This new cultivar was the result of a unique cross between Dendranthema×grandiflora and F1 progeny of a cross between Dendranthema weyrichii and Dendranthema×grandiflora.
摘要:
Devices and methods of providing hardware support for dynamic type checking are provided. In some embodiments, a processor includes a type check register and support for one or more checked load instructions. In some embodiments, normal load instructions are replaced by a compiler with the checked load instructions. In some embodiments, to perform a checked load, an error handler instruction location is stored in the type check register, and a type tag operand is compared to a type tag stored in the loaded memory location. If the comparison succeeds, execution may proceed normally. If the comparison fails, execution may be transferred to the error handler instruction. In some embodiments, type prediction is performed to determine whether a checked load instruction is likely to fail.
摘要:
Addressed is a system and method for remote data caching and replication by local copy maintenance of remote data within a SAN file system. Distributed Storage Tank (DST), an extension to a SAN file system, provides for transparent SAN client access of local copies by importing, exporting, and storing data using network file access protocols as well as by providing assurance of metadata and file content validity. A Remote Access Agent (RAA) handles protocol implementation and conversion necessary for communication with remote data sources. Controlled by a consistency policy, consistency is maintained by RAA fetching and updating local copies if modifications have occurred to a file since it was first stored as a local copy in local storage. Additionally, RAA returns metadata pertaining to the requested data. A SAN client obtains metadata corresponding to the requested data and utilizes it to directly access locally stored copies of remote data.
摘要:
A system provides referencing from one file system server to another through the use of a file system location database improving movement and replication of file systems. When a file system is moved from a first file system server a data object that references the file system remains in the first server and contains information used to find the current location of the file system. The actual location of the file system is stored in the separate file system location database which contains the locations of file systems on a number of file system servers. This allows the data in a file system to be replicated or moved without requiring updates to the data in any redirecting or referencing servers.
摘要:
Improved techniques are disclosed for accessing content in file systems, allowing file system clients to realize advantages of file system referrals even though a file access protocol used by the client is not specifically adapted for referral objects. (For example, the client may have a legacy file system protocol or a proprietary file system protocol which does not support referrals.) These advantages include a uniform name space view of content in a network file system, and an ability to locate content in a (nearly) seamless and transparent manner, even though the content may be dynamically moved from one location to another or replicated in different locations. A file system server returns a symbolic link in place of a referral, and an automated file mounting process on the client is leveraged to access the content using the link. Built-in crash recovery techniques of the file system client are leveraged to access moved content.