Performance Tuning for Linux Servers [Electronic resources] نسخه متنی

I/O Schedulers and Performance

As a workload generator, this case study utilizes the flexible file system benchmark (FFSB) infrastructure. FFSB represents a benchmarking environment that facilitates I/O performance analysis by simulating a diverse set of I/O patterns. The benchmarks are executed on multiple individual file systems, utilizing an adjustable number of worker threads, where each thread may operate either out of a combined or a thread-based I/O profile. Aging the file systems, as well as collecting system utilization and throughput statistics, is part of the benchmarking framework. In addition to the more traditional sequential read and sequential write benchmarks, this case study uses a file server, a web server, a mail server, and a metadata-intensive I/O profile (discussed in the preceding section).response time represents the total runtime of the actual FFSB benchmark, incorporating all the I/O operations that are executed by the worker threads.

The following section discusses the benchmark conducted on the single-CPU single-disk system.