Isilon Cluster Performance Monitoring Performance tuning relies on adequate performance monitoring and data collection. With the release of OneFS 5.5 a new performance statistics collection tool is available that can be invoked through the isi statistics command line interface. The tool provides a wide array of performance data at the system, protocol and client view level. The isi statistics can be invoked using several modes of operations using the following subcommands: isi statistics system The system mode of the isi statistics tool is the most basic mode of operation. System mode provides high-level cluster performance metrics in an easily-accessible format. The system output includes CPU utilization, per protocol and total throughput (CIFS, FTP, HTTP, and NFS), network throughout, and disk I/O. isi statistics protocols Protocol and client modes display cluster usage statistics organized by communication protocol. Operations are also grouped according to the following classes: read, write, create, delete, namespace operations, file state, session state and other file system information isi statistics client The client mode of the tool shares a great deal of functionality with the protocol mode . The client mode allows theuser to view and sort statistics according to the following identification fields in addition to the fields shared betweenprotocol and client modes: client IP address or name, node ip or address, user ID or name. In addition to these basic modes of operations a comprehensive set of raw statistics data can be collected using the isi statistics query subcommand. With the query subcommand over 400 statistics can be collected . Each of these basic and advanced modes of operation offer a rich set of filtering, sorting, grouping and display options. For more information please refer to the Isilon command line interface manual.