IOzone 3.300

IOzone is a benchmark utility system files. IOzone is a tool to benchmark filesystem. The benchmark generates and measures a variety of file operations. IOzone has been ported to many machines and runs under many operating systems.Iozone is very useful to analyze the file system range of platform from a vendor. The benchmark tests file I / O performance for the following: · Read, write, read, re-write, read backwards, read strided, fread, fwrite, random read, pread, mmap, aio_read, aio_write. Here are some key features of "IOzone" · ANSII · C source POSIX async I / O • mmap () file I / O • Normal file I / O • Measure single stream flows · multiple-site activities measures Distributed File Server (Cluster) · POSIX pthreads Multi-process measurement of · Excel importable output for Parcels created graphics latency · 64bit compatible source file Large · compatible · elevates the walls in the flow tests to eliminate the effects straggler · cache size configurable processor · steps selectable with Fsync, O_SYNC · Builds for: AIX, BSDI, HP-UX, IRIX, FreeBSD, Linux, OpenBSD, NetBSD, OSFV3, OSFV4, OSFV5, SCO OpenServer, Solaris, Windows95 computers / 98/NTWhile are generally purchased through an application in mind, it is also likely that over time the different applications will change. Many suppliers have improved their operating systems to perform well for some frequently used applications.Although, which accelerates the I / O for these applications, it is also likely that the system may not work well for other applications that were not targeted by the operating system. An example of this type of enhancement is: Database. Several operating systems vendors have tested and refined the system files so it works well with databases.While database users are happy, other users may not be as happy as the whole system may be giving all system resources for users in the database detriment of all other users. As time passes the system administrator may decide that some other automation tasks of office could be shifted to this machine charge may now switch between applications to drive at random (database) to a sequential reader . Users may discover that the machine is very slow when you run this new application and become dissatisfied with the decision to buy this platform.By using IOzone for extensive coverage of the file system performance of the buyer is more likely see hot spots or cold, choose a platform and operating system that is more well balanced.The NFS3 read latency graph shows the latency of 4k read operations on a version of the NFS file system mounted on a 3 customer running Iozone.The NFS3 Reread graph shows the latency of read latency of 4k reads a version of the NFS file system 3. One can clearly see the effects of client-side cache. Here, the latency is the same as latencies.What local buffer cache 's new in this version: · This release adds support for testing Dedupe. · - W + and - more options were added.