Remote Differential Compression
Overview of the Remote Differential Compression technology.
To develop Remote Differential Compression, you need these headers:
For programming guidance for this technology, see:
Enumerations
| GeneratorParametersType Defines the set of supported generator parameters. |
| RDC_ErrorCode Defines the set of RDC-specific error codes. |
| RdcCreatedTables Defines values that describe the state of the similarity traits table, similarity file ID table, or both. |
| RdcMappingAccessMode Defines the access mode values for RDC file mapping objects. |
| RdcNeedType Defines the set of data chunks used to generate a remote copy. |
Functions
| Append Adds the file ID and similarity data information to the tables in the similarity file. |
| Append Adds the file ID to the similarity file ID table. |
| Append Adds a SimilarityData structure to the similarity traits table. |
| BeginDump Retrieves similarity data from the similarity traits table. |
| CloseMapping Closes a file mapping object for a similarity traits table file. |
| CloseTable Closes the tables in a similarity file. |
| CloseTable Closes a similarity file ID table. |
| CloseTable Closes a similarity traits table. |
| ComputeDefaultRecursionDepth Computes the maximum level of recursion for the specified file size. |
| CopyAndSwap Creates copies of an existing similarity traits table and an existing similarity file ID table, swaps the internal pointers, and deletes the existing tables. |
| CreateComparator Creates a signature comparator. |
| CreateGenerator Creates a signature generator that will generate the specified levels of signatures. |
| CreateGeneratorParameters Returns an IRdcGeneratorParameters interface pointer initialized with the parameters necessary for a signature generator. |
| CreateSignatureReader Creates a signature reader to allow an application to decode the contents of a signature file. |
| CreateTable Creates or opens a similarity traits table and a similarity file ID table. |
| CreateTable Creates or opens a similarity file ID table. |
| CreateTable Creates or opens a similarity traits table. |
| CreateTableIndirect Creates or opens a similarity traits table and a similarity file ID table using the RDC application's implementations of the ISimilarityTraitsMapping and IRdcFileWriter interfaces. |
| CreateTableIndirect Creates or opens a similarity file ID table using the RDC application's implementation of the IRdcFileWriter interface. |
| CreateTableIndirect Creates or opens a similarity traits table using the RDC application's implementation of the ISimilarityTraitsMapping interface. |
| CreateView Maps a view of the file mapping for a similarity traits table file. |
| DeleteOnClose Sets a file to be deleted (or truncated) on close. |
| EnableSimilarity Enables the signature generator to generate similarity data. |
| FindSimilarFileId Returns a list of files that are similar to a given file. |
| FindSimilarFileIndex Returns a list of files that are similar to a given file. The results in the list are sorted in order of similarity, beginning with the most similar file. |
| Flush Writes to the disk any dirty pages within a mapped view of a similarity traits table file. |
| Get Returns information about the mapped view of a similarity traits table file. |
| GetFilePosition Returns the current file position. |
| GetFileSize Returns the size of a file. |
| GetFileSize Returns the size of a similarity traits table file. |
| GetGeneratorParameters Returns a copy of the parameters used to create the generator. |
| GetGeneratorParametersType Returns the specific type of the parameters. |
| GetHashWindowSize Returns the hash window size�the size of the sliding window used by the FilterMax generator for computing the hash used in the local maxima calculations. |
| GetHorizonSize Returns the horizon size�the length over which the FilterMax generator looks for local maxima. |
| GetLastIndex Retrieves the index of the last entry that was stored in the similarity traits table. |
| GetNextData Retrieves one or more SimilarityDumpData structures from the similarity traits list that was returned by the ISimilarityTraitsTable::BeginDump method. |
| GetNextFileId Retrieves the next valid similarity file ID in the file list that was returned by the ISimilarity::FindSimilarFileId method. |
| GetPageSize Returns the page size (disk block size) for a similarity traits table file. |
| GetParametersVersion Returns information about the version of RDC used to serialize the parameters. |
| GetRDCVersion Retrieves the version of the installed RDC runtime and the oldest version of the RDC interfaces supported by the installed runtime. |
| GetRecordCount Retrieves the number of records that are stored in the similarity file ID table in a similarity file. |
| GetRecordCount Retrieves the number of records that are stored in a similarity file ID table. |
| GetSerializeSize Returns the size, in bytes, of the serialized parameter data. |
| GetSize Retrieves the number of entries in the file list that was returned by the ISimilarity::FindSimilarFileId method. |
| GetView Returns the beginning and ending addresses for the mapped view of a similarity traits table file. |
| Invalidate Marks a file ID as not valid in the similarity file ID table. |
| Lookup Retrieves the file ID that corresponds to a given file index in the similarity file ID table. |
| OpenGeneratorParameters Opens an existing serialized parameter block and returns an IRdcGeneratorParameters interface pointer initialized with the data. |
| OpenMapping Opens the file mapping object for a similarity traits table file. |
| Process Compares two signature streams (seed and source) and produces a needs list, which describes the chunks of file data needed to create the target file. |
| Process Processes the input data and produces 0 or more output bytes. |
| Read Reads the specified amount of data starting at the specified position. |
| ReadHeader Reads the signature header and returns a copy of the parameters used to generate the signatures. |
| ReadSignatures Reads a block of signatures from the current position. |
| ReportProgress Reports the current completion percentage of a similarity operation in progress. |
| ResizeMapping Resizes the file mapping object for a similarity traits table file. |
| Results Retrieves the similarity data that was generated for a file by the signature generator. |
| Serialize Serializes the parameter data into a block of memory. |
| SetFileSize Sets the size of a similarity traits table file. |
| SetHashWindowSize Sets the hash window size�the size of the sliding window used by the FilterMax generator for computing the hash used in the local maxima calculations. |
| SetHorizonSize Sets the horizon size�the length over which the FilterMax generator looks for local maxima. |
| Truncate Truncates a file to zero length. |
| Unmap Unmaps a mapped view of a similarity traits table file. |
| Write Write bytes to a file starting at a given offset. |
Interfaces
| IFindSimilarResults Provides methods for retrieving information from the file list returned by the ISimilarity::FindSimilarFileId method. |
| IRdcComparator Used to compare two signature streams (seed and source) and produce the list of source and seed file data chunks needed to create the target file. |
| IRdcFileReader The IRdcFileReader interface is used to provide the equivalent of a file handle, because the data being synchronized may not exist as a file on disk. |
| IRdcFileWriter Abstract interface to read from and write to a file. |
| IRdcGenerator Used to process the input data and read the parameters used by the generator. |
| IRdcGeneratorFilterMaxParameters Sets and retrieves parameters used by the FilterMax generator. |
| IRdcGeneratorParameters Is the generic interface for all types of generator parameters. All generator parameter objects must support this interface. |
| IRdcLibrary Is the primary interface for using RDC. |
| IRdcSignatureReader Reads the signatures and the parameters used to generate the signatures. |
| IRdcSimilarityGenerator Defines methods for enabling the signature generator to generate similarity data and for retrieving the similarity data after it is generated. |
| ISimilarity Defines methods for storing and retrieving per-file similarity data and file IDs in a similarity file. |
| ISimilarityFileIdTable Defines methods for storing and retrieving similarity file ID information. |
| ISimilarityReportProgress Defines a method for RDC to report the current completion percentage of a similarity operation. |
| ISimilarityTableDumpState Provides a method for retrieving information from the similarity traits list that was returned by the ISimilarityTraitsTable::BeginDump method. |
| ISimilarityTraitsMappedView Provides methods that an RDC application can implement for manipulating a mapped view of a similarity traits table file. |
| ISimilarityTraitsMapping Provides methods that an RDC application can implement for creating and manipulating a file mapping object for a similarity traits table file. |
| ISimilarityTraitsTable Defines methods for storing per-file similarity data and performing similarity lookups. |
Structures
| FindSimilarFileIndexResults Contains the file index information that the ISimilarityTraitsTable::FindSimilarFileIndex method returned for a matching file. |
| RdcBufferPointer Describes a buffer. |
| RdcNeed Contains information about a chunk that is required to synchronize two sets of data. |
| RdcNeedPointer Describes an array of RdcNeed structures. |
| RdcSignature Contains a single signature and the length of the chunk used to generate it. |
| RdcSignaturePointer Describes an array of RdcSignature structures. |
| SimilarityData Contains the similarity data for a file. |
| SimilarityDumpData Contains the similarity information that was returned for a file by the ISimilarityTableDumpState::GetNextData method. |
| SimilarityFileId Contains the similarity file ID for a file. |
| SimilarityMappedViewInfo Contains information about a similarity mapped view. |