在你的实现中,这里会有一个global Lock manager for the entire system(跟bpm一样)TableHeap和Executor classes会在一个事务想要访问/修改一个tuple时使用你的LM来获取locks on tuple records(by RID) 这个任务要求你实现一个tuple级别的LM,其支持三种常见的隔离级别,READ_UNCOMMITED, READ_COMMITTED, and REPEATAB...
Concurrent processes come into conflict when they are competing for use of the same resource, such as I/O devices, memory, processor time, and the clock. In the case of competing processes, three control problems must be faced. 并发进程在竞争使用相同的资源(如I/O设备、内存、处理器时间和时钟...
Database concurrency control is concerned with the logical consistency and integrity of a database; the physical concurrency control offered by the operating system (OS) and the hardware is assumed to be in place. This chapter takes a look at the multiuser environment and then turns to the ...
Database concurrency control is concerned with the logical consistency and integrity of a database; the physical concurrency control offered by the operating system (OS) and the hardware is assumed to be in place. This chapter takes a look at the multiuser environment and then turns to the ...
to a process control block; now, we will need one or more thread control blocks to store the state of each thread of a process. There is one major difference, though, in the context switch we perform between threads as compared to processes: the address space remains the same ...
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Previously, we developed a data-centric approach to concurrency control in which programmers specify synchronization constraints declaratively, by grouping... D Marino,C Hammer,J Dolby,... - International Conference on Software Engineering 被引量: 30发表: 2013年 A Micro Workflow Framework for Composi...
concurrency controlWhile the B-tree (or the B-tree) is the most popular index structure in disk-based relational database systems, the T-tree has ... H Lu 被引量: 61发表: 2000年 Efficient optimistic concurrency control using loosely synchronized clocks This paper describes an efficient optimis...
Database concurrency control is concerned with the logical consistency and integrity of a database; the physical concurrency control offered by the operating system (OS) and the hardware is assumed to be in place. This chapter takes a look at the multiuser environment and then turns to the ...
When several transactions execute concurrently in a database, the isolation property may no longer be preserved. It is necessary for the system to control ... G Arumugam,M Thangaraj - 《Data Science Journal》 被引量: 3发表: 2005年 加载更多来源...