Re: RE: [performance] why rbd_aio_write latency increase from 4ms to 7.3ms after the same test

2015-11-02 Thread hzwulibin
hanks! -- hzwulibin 2015-11-03 - 发件人:"Chen, Xiaoxi" 发送日期:2015-11-02 14:11 收件人:hzwulibin,ceph-devel,ceph-users 抄送: 主题:RE: [performance] why rbd_aio_write latency increase from 4ms to 7.3ms after the same test Pre-allocated th

Re: RE: [performance] why rbd_aio_write latency increase from 4ms to 7.3ms after the same test

2015-11-02 Thread hzwulibin
hanks! -- hzwulibin 2015-11-03 - 发件人:"Chen, Xiaoxi" 发送日期:2015-11-02 14:11 收件人:hzwulibin,ceph-devel,ceph-users 抄送: 主题:RE: [performance] why rbd_aio_write latency increase from 4ms to 7.3ms after the same test Pre-allocated th

RE: [performance] why rbd_aio_write latency increase from 4ms to 7.3ms after the same test

2015-11-01 Thread Chen, Xiaoxi
Pre-allocated the volume by "DD" across the entire RBD before you do any performance test:). In this case, you may want to re-create the RBD, pre-allocate and try again. > -Original Message- > From: ceph-devel-ow...@vger.kernel.org [mailto:ceph-devel- > ow...@vger.kernel.org] On Behalf O