What kind of compute Service Offering are you using for the instance? There may be some painfully restrictive settings in there.
Best regards, David Comerford Mobile: +353 87 1238295 Email: davest...@gmail.com Website: http://dave.ie GPG key: http://pgp.dave.ie On 7 July 2013 05:07, WXR <1485739...@qq.com> wrote: > The host node has 96GB ram and 2 E5-2620 cpus.There is just one vm for > test on this node. > The storage node is just only working for the host node. > > I don't know if cloudstack has some default resource limit policies. > I don't think workload is the reason.There may be a system feature which > cause this issue,about cloudstack,or kvm,or windows system,or storage > device,or something else. > Does any one have relevant experience in dealing with this issue? > > > > ------------------ Original ------------------ > From: "David Comerford"<davest...@gmail.com>; > Date: Sun, Jul 7, 2013 05:43 AM > To: "users"<users@cloudstack.apache.org>; > > Subject: Re: vm's disk io performance declines quickly after being > created0.5-1 hours later. > > > > Doesn't sounds like a CloudStack problem. > Spin up a Linux instance and see does it have the same problem. > > Then apply some science and check I/O inside the instance. Then I/O on the > primary storage device. > Keep an eye on the storage NICs too. > > Does you host have enough RAM? Maybe it's booting up in main memory and > starting to swap over the hour. > > Best regards, > David Comerford > Mobile: +353 87 1238295 > Email: davest...@gmail.com > Website: http://dave.ie > GPG key: http://pgp.dave.ie > > > On 6 July 2013 10:56, WXR <1485739...@qq.com> wrote: > > > I create a windows 2003 server enterprise 32bit vm template. > > When I use this template to create a vm instance and start the vm.The > disk > > io performance is normal,it just takes 5 seconds to copy a 200MB file.And > > other files/directories copy jobs are very fask. > > > > But 0.5-1 hours later,the vm need serveral minutes to copy a 200MB > > file,and all other files copy job become very slow. > > > > I don't know if it is an issue of windows 2003 vm template,or cloudstack > > configuration,or storage configuration. > > Does anyone meet the same issue? >
