Broadly speaking, the present techniques relate to a machine-implemented method for registering a device with a server, the method performed at the device comprising: applying a data-reducing function to at least one object, object instance, resource and/or resource instance at the device to generate resource data comprising compressed data representative of the at least one object object instance, resource and/or resource instance; transmitting a registration message comprising said resource data to register said device with server.

A computer memory compression method involves analyzing computer memory content with respect to occurrence of duplicate memory objects as well as value redundancy of data values in unique memory objects. The computer memory content is encoded by eliminating the duplicate memory objects and compressing each remaining unique memory object by exploiting data value locality of the data values thereof. Metadata is provided to represent the memory objects of the encoded computer memory content. The metadata reflects eliminated duplicate memory objects, remaining unique memory objects as well as a type of compression used for compressing each remaining unique memory object. A memory object in the encoded computer memory content is located using the metadata.

Techniques are disclosed for compressing data. The techniques include identifying, in data to be compressed, a first set of values, wherein the first set of values include a first number of two or more consecutive identical non-zero values; including, in compressed data, a first control value indicating the first number of non-zero values and a first data item corresponding to the consecutive identical non-zero values; identifying, in the data to be compressed, a second value having an exponent value included in a defined set of exponent values; including, in the compressed data, a second control value indicating the exponent value and a second data item corresponding to a portion of the second value other than the exponent value; and including, in the compressed data, a third control value indicating a third set of one or more consecutive zero values in the data to be compressed.

A method of and system of for compressing and decompressing a localized software resource is disclosed. The method may include receiving a software resource, the software resource being in a first language, receiving a localized software resource for compression, where the software resource in the first language is a counterpart of the localized software resource in the second language. Upon receiving the software resources creating a first local dictionary for the localized software resource based at least in part on one or more first language words in the software resource and on data from a global dictionary, and compressing the localized software resource based on the local dictionary.

Techniques for processing data may include: receiving a candidate data block; computing a distance using a distance function, wherein the distance is an entropy-based distance and denotes a measurement of similarity between the candidate data block and a target data block; and determining, using the distance, whether to perform data deduplication of the candidate data block with respect to the target data block to identify at least one sub-block of the candidate data block that is a duplicate of at least one sub-block of the target data block. If the distance is less than a threshold, it may be expected to have a matching sub-block between the candidate and target data blocks. The distance may be a difference between entropy values for the candidate and target data blocks. The first entropy value may be used to determine whether to compress or perform partial deduplication for the candidate data block.

Delta compression method, system and computer program product. Portions of source and target data files are hashed using a hashing function. A target data file is compared against the source data file to determine at least one delta difference between the files. A source data file hashing table is generated. The table includes hashed portions of the source and target data files stored in corresponding source file offset locations and corresponding target file offset locations, respectively. Portions of the source and target files are compared using corresponding source and target file offset locations. At least one common sequence of characters in the portions of the source and target files is determined based on the comparison. A patch file is generated based on the determined sequence of characters.

Provided are a data transmission method and device. The method includes: processing a first data packet to be sent by using a compression strategy obtained in advance from a receiving end, deleting specified duplicated data comprised in the compression strategy in the first data packet; generating a second data packet to be sent from the processed first data packet, where the second data packet includes a modification record field for indicating the deleted duplicated data; and sending the second data packet to the receiving end.

A method for compressing semi-structured data is discussed. The method includes accessing semi-structured data, the semi-structured data comprising a plurality of elements. The method includes determining a plurality of unique elements of the plurality of elements, each of the plurality of unique elements associated with a respective unique index of a plurality of unique indexes. Each of the unique index can indicate a position in one of a plurality of data stores. The method includes generating a sequence of encoded representations corresponding to the plurality of elements, the generating based on the plurality of unique indexes.

An aspect includes implementing capacity reduction in a storage system includes for each of a candidate page and a target page in the storage system, identifying a subset of sectors having identical data or a minimum amount of non-identical data, performing a bit-wise exclusive OR (XOR) operation on sectors of the candidate page and the target page, determining entropy from results of the XOR operation. Upon determining the entropy is less than or equal to a threshold value, an aspect includes building a reference page from an XOR sector containing results of the bit-wise XOR operation, and performing a compression operation on the reference page.

An aspect of managing data block compression in a storage system includes performing, for each block written to the storage system: bit-wise traversing the block, searching the block for a pattern indicating a repeating sequence of bits and, upon determining the pattern exists in the block and the repeating sequence of bits in the pattern exceeds a threshold value, removing the repeating sequence of bits from the block thereby yielding a reduced-size block.