Validating the MaStA I/O Cost Model for DB Crash Recovery Mechanisms
نویسنده
چکیده
The design of database crash recovery mechanisms on modern computer systems must take account of the relative speed of processors over disks. In these systems disk I/O activity is the dominant expense and the disk transfer time relative to seek time makes patterns of disk access significant. The MaStA (Massachusetts St Andrews) cost model for database crash recovery mechanisms, designed by the authors, provides finer grained distinctions of I/O costs than previous work by being structured independently of machine architectures and application workloads and refining costs in terms of I/O categories, access patterns and application workload parameters. The main features of the model are:
منابع مشابه
The MaStA I/O Cost Model and its Validation Strategy
Crash recovery in database systems aims to provide an acceptable level of protection from failure at a given engineering cost. A large number of recovery mechanisms are known, and have been compared both analytically and empirically. However, recent trends in computer hardware present different engineering tradeoffs in the design of recovery mechanisms. In particular, the comparative improvemen...
متن کاملWhy would I believe your store is better than mine?
Comparing the performance of computer systems leads to measurement techniques and experiments that are often questioned or interpreted with prejudice, faith, opinion or sceptical caution. In the main, such results are usually derived either through empirical analysis or simulation. A third technique, analytical modelling, is less widely adopted but can exhibit a number of advantages over the ot...
متن کاملPresenting a Multi-Objective Mathematical Model for Time-Cost trade off Problem Considering Time Value of Money and Solve it by MOPSO Algorithm
The time - cost tradeoff problem is one of the most critical issues in the project scheduling field and so far, a lot of research has been done with a variety of quantitative and qualitative approaches on this subject. In this research, we intend to provide a two - objective mathematical model which balances crash and delay for activities. So that it provides the right tools for decision makers...
متن کاملAccelerated Deactivation and Activity Recovery Studies of Ruthenium and Rhenium Promoted Cobalt Catalysts in Fischer-Tropsch Synthesis
Accelerated deactivation of Co/Al2O3 catalysts in Fischer-Tropsch synthesis and the effect of Re and Ru as the catalytic promoters are reported. 15wt% Co/Al2O3 catalyst and 1wt% Ru and 1.4wt% Re promoted cobalt catalysts have been formulated and extensively characterized. The deactivation of the unpromoted cobalt catalyst and those promoted with ...
متن کاملA simple and communication-efficient Omega algorithm in the crash-recovery model
a r t i c l e i n f o a b s t r a c t This paper presents a new algorithm implementing the Omega failure detector in the crash-recovery model. Contrary to previously proposed algorithms, this algorithm does not rely on the use of stable storage and is communication-efficient, i.e., eventually only one process (the elected leader) keeps sending messages. The algorithm relies on a nondecreasing l...
متن کامل