什么是IOPs?

neoliang

我是一个菜鸟,经常在介绍存储产品的资料中看到关于IOPS的参数,但一直不明白其真正的含义,所以想请高手指点一下.谢谢!

yanggq

存储端的IOPS性能和主机端的IO是不同的，IOPS是指存储每秒可接受多少次主机发出的访问，主机的一次IO需要多次访问存储才可以完成。例如，主机写入一个最小的数据块，也要经过“发送写入请求、写入数据、收到写入确认”等三个步骤，也就是3个存储端访问。\r\n\r\n所以到底能支持多少个IO，要看业务系统类型和数据读写方式了。

wysfenghuo007

楼上说的对，每秒处理主机的io请求数。一般iops越大越好

iPod

http://en.wikipedia.org/wiki/IOPS\r\n\r\nIOPS (Input/Output Operations Per Second) is a common benchmark for harddisks and other computer storage media. Like with any benchmark, IOPS numbers published by drive and SAN vendors are often misleading and do not guarantee real-world application performance.\r\n\r\nIOPS can be measured with applications such as Iometer (originally developed by Intel) as well as IOZone[1] and FIO[2] and is primarily used with servers to find the best storage configuration.\r\n\r\nThe specific number of IOPS possible in any server configuration will vary greatly depending upon the variables the tester enters into the program, including the balance of read and write operations, the mix of random or sequential access patterns, the number of worker threads and queue depth, as well as the data block sizes.\r\n\r\n.................\r\n看看这个wiki，说的比较详细了

bensoner

比较详细了，还是需要点计算机的基础的

zhangout

IOPS是个参数?还是一个变量?