摘要:
A version control system such as may be used in an information management system for a source code development project. Multiple versions of artifacts are stored in the version control system. Some versions are stored in uncompressed form while others are stored in compressed form. The artifacts selected to be stored in compressed form are selected to facilitate rapid retrieval of files. The compression process is such that the compression may be performed as a background operation.
摘要:
Mechanisms for updating an address book. A first computing system generates an address book update file format and provides the file to a second computing system. The file format contains several data fields. One of the data fields consists of a configurable list of attribute property identifications. These property identifications represent address book information such as e-mail address, phone number, first name, surname, and the like. A second data field comprises contact data that includes at least some of the properties identified by the configurable list. Changes to the information contained in the address book update may be made by simply adding or deleting attribute property identifications. This has the effect of allowing modifications to the address book file format without having to generate a new file format.
摘要:
Compression of streaming data is described. In an implementation, a method includes compressing data for communication in a terminal services environment by finding an index in a lookup table that matches an initial sequence in data. The lookup table includes a plurality of entries. Each of the entries is discoverable utilizing a particular one of a plurality of the indices. Each entry references whether a corresponding index is located in a history buffer, and if so, further references one or more locations of the corresponding index in the history buffer. If the corresponding entry of the matching index references a plurality of locations, for each location, a sequence having the matching index is compared with a sequence in the data that includes the initial sequence. A matching sequence is derived from the comparison based on a length and the location of the sequence at each of the locations. The matching sequence is represented using a representation that includes the length and the location of the matching sequence in the history buffer.
摘要:
Encoding a new version of a data module includes constructing a delta data module having data for providing the new version of the data module. The delta data module may indicate an encoding for copying data at an offset from one of a number of pointers into different versions of the data module. Decoding a delta data module to provide a new version of a data module includes copying, to the new version of the data module, data relative to a target pointer when an encoding in the delta data module indicates a matching pattern relative to the target pointer, and copying, to the new version of the data module, data relative to at least one other pointer when an encoding in the delta data module indicates a matching pattern relative to the at least one other pointer.
摘要:
Encoding a new version of a data module includes constructing a delta data module having data for providing the new version of the data module. The delta data module may indicate an encoding for copying data at an offset from one of a number of pointers into different versions of the data module. Decoding a delta data module to provide a new version of a data module includes copying, to the new version of the data module, data relative to a target pointer when an encoding in the delta data module indicates a matching pattern relative to the target pointer, and copying, to the new version of the data module, data relative to at least one other pointer when an encoding in the delta data module indicates a matching pattern relative to the at least one other pointer.
摘要:
A system and method for providing file data, such as a set of files for updating a computer system, in a self-contained package, in which the package size is significantly reduced via delta compression. A build mechanism examines files to be distributed, and generates a self-contained package containing files and deltas. To this end, a directed graph is built from the sizes of the various base file and delta file possibilities, and a minimum spanning tree computation selects the files that result in the smallest package. A base file may have multiple deltas applied to synthesize multiple files, and any base file may itself have been previously synthesized from another base file and a delta. A client extraction mechanism, optionally provided with the package, works with the contents of the package as directed by a manifest to synthesize target files from the base files and the contained deltas.
摘要:
A system and method for managing the installation of files on a computing device are provided. A client computing device obtains installation information identifying a version of a baseline installation component stored on the client computing device. The installation information also includes an installation component delta patch that is merged with the baseline installation component to generate an updated installation component. The updated installation component is utilized to install one or more files on the client computing device. Upon completion of the installation, the updated installation component can be deleted.
摘要:
A system and method for providing file data, such as a set of files for updating a computer system, in a self-contained package, in which the package size is significantly reduced via delta compression. A build mechanism examines files to be distributed, and generates a self-contained package containing files and deltas. To this end, a directed graph is built from the sizes of the various base file and delta file possibilities, and a minimum spanning tree computation selects the files that result in the smallest package. A base file may have multiple deltas applied to synthesize multiple files, and any base file may itself have been previously synthesized from another base file and a delta. A client extraction mechanism, optionally provided with the package, works with the contents of the package as directed by a manifest to synthesize target files from the base files and the contained deltas.
摘要:
A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS2) and carbon particles. The electrolyte comprises a lithium salt dissolved in an organic solvent mixture. The electrolyte contains between about 100 and 2000 parts by weight water per million parts by weight (ppm) electrolyte therein. The electrolyte may contain between about 200 and 2000, or between about 500 and 2000 parts by weight water per million parts by weight electrolyte. A cathode slurry is prepared comprising iron disulfide powder, carbon, binder, and a liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.
摘要:
An invention is disclosed for compressing data. In embodiments of the invention, input data is processed to determine one or more hints, or meta-data about how to compress the data. These hints may be produced based on the contents of the data itself, or by the process which generated the data. A hint may comprise an indication that a portion of the data matches another portion of the data, an indication that the portion of the data should not be compressed by an associated compressor, or an indication that the portion of the data should be compressed normally by the associated compressor. The source data and these hints may then be sent to a compressor, which traverses both the source data and the hints, and encodes the source data accordingly to produce an encoded data output stream.