Technology for supporting multi-process embedded tree-based databases
A database and embedded technology, applied in the direction of multi-programming devices, electrical digital data processing, special data processing applications, etc., can solve the problem of low query performance, and achieve the effect of safe and reliable functions, easy implementation, and guaranteed safety and reliability
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[0047] An embedded tree database technology that supports multiple processes, including program initial flow and watermark operation flow.
[0048] The initial process is shown in Figure 1, starting from step 101 to initialize the read-write lock. In order to support multi-process operations, semaphores are used to implement mutual exclusion between processes.
[0049] Then enter step 102 to load the data in the database file and the cache file to the shared memory. The data is stored in serialized characters on the disk. This step is to parse the data on the disk into the corresponding tree structure in the memory.
[0050] Loading data in database files and cache files to shared memory is implemented in this way: it includes shared memory, content cache and binary tree serialized storage, among which,
[0051] The shared content is: on the non-Windows platform, realize the creation and distribution of the shared memory through the functions of shmget and shmat; on the Window...
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