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博客园 - Alvin

python2.7 pip opencv 运维url收集 转 string和byte[]的转换 (C#) Thrift Oracle AWR 并发编程 LED相关 vpn拨入route设置 - Alvin sql ext3 转 ext4 操作 lvm urlx lvm 相关 多线程程序排错总结 huawei 使用Powershell 管理 Windows 2012 hyper-v复制 .net Basic MQ测试
IO
Alvin · 2014-11-22 · via 博客园 - Alvin

深入探析c# Socket

iostat中的%util代表一秒内IO操作所占的比例,计算公式是(r/s+w/s)*(svctm/1000),对于一块磁盘,因为没有并发IO的概念,所以这个公式是正确的,但是对于RAID磁盘组或者SSD来说,这个计算公式就有问题了,就算这个值超过100%,也不代表存储有瓶颈,容易产生误导。