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Allocator (C )
Allocation may refer to: Computing * Block allocation map * Allocator (C++), C++ allocators * Delayed allocation * File allocation table * IP address allocation * Memory allocation * Cache (computing), No-write allocation (cache) * Register allocation Economics * Asset allocation * Economic system * Market allocation scheme * Resource allocation * Tax allocation district Telecommunication * Call-sign allocation plan * Frequency allocation * Type allocation code Other * Allocution (law), or allocutus, is a formal statement made to the court * Allocation (oil and gas) in hydrocarbon accounting to assign the proper portions of aggregated petroleum and gas flows back to contributing sources * Allocation voting in voting * Location-allocation, used in geographic information systems (GIS) * The allocation of scarce resources in operations research See also * Location (other) {{Disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Block Allocation Map
In computer file systems, a block allocation map is a data structure used to track Block size (data storage and transmission), disk blocks that are considered "in use". Blocks may also be referred to as allocation units or Data_cluster, clusters. CP/M used a block allocation map in its Directory_(file_systems), directory. Each directory entry could list 8 or 16 blocks (depending on disk format) that were allocated to a file. If a file used more blocks, additional directory entries would be needed. Thus, a single file could have multiple directory entries. A benefit of this method is the possibility to use sparse files by declaring a large file size but only allocating blocks that are actually used. A detriment of this method is the disk may have free space (unallocated blocks) but data cannot be appended to a file because all directory entries are used. Errata The Commodore DOS used a similarly named but significantly different noting. See also * File Allocation Table (FA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |