CS4.2.1+KVM环境下，存储使用local（即建好的虚机位于KVM本机上），新建的VM读写速度很慢
1. 我在KVM上的新建的虚机上搭建好了web服务器，局域网内另外一台计算机上通过这台Web服务器下载文件，下载的平均速度只有1.2M/S
2. 我从局域网内的一台正常Web服务器下载文件到该KVM上的虚拟机，速度只有700K/S
而我们的局域网是千兆网络，从web服务器下载文件到自己本地的机器速度都有100M/S
请问：CS4.2.1下，KVM下建好的虚机磁盘读写速度为什么会这么慢，怎么样解决这个问题？
PS：从网络和存储两个方面考虑
麻烦各位给个解决办法，谢谢
阁下如果从下载速度来判定磁盘问题，有所不妥，用dd if=/dev/zero
of=/root/test bs=1M count=1000看磁盘速度更合适一些，下载速度这个样子应该
先考虑是不是网络问题而不是磁盘问题，看看是不是mtu太小，先在vm内执
行：ping 223.6.6.6 -s 2000 与 ping 223.6.6.6 ,如果大小为2000字节的包全丢
了而默认大小(84)的包都得到回应，则肯定是mtu问题，相关交换机mtu 改成 1548
（可以比1548小点但是最好大于1522, 没去确认）试下.
于 07/09/2014 03:58 PM,
我之前也遇到过这个问题，想问一下你的CS4.2.1环境是不是用的Ubuntu 12.04.3
? 后来我改成 CentOS 6.4 就好了，很奇怪，一
直没有想通这是为什么？
于 2014/7/9 15:58, evanitsharp 写道:
CS4.2.1+KVM环境下，存储使用local（即建好的虚机位于KVM本机上），新建的VM读写速度很慢
1. 我在KVM上的新建的虚机上搭建好了web服务器，局域网内另外一台计算机上通过这台Web服务器下载文件，下载的平均速度只有1.2M/S
2. 我从局域网内的一台正常Web服务器下载文件到该KVM上的虚拟机，速度只有700K/S
evanitsharp,您好！
你的dd命令可能不正确，应该这样测试：
# dd bs=1M count=1000 if=/dev/zero of=test oflag=dsync
=== 2014-07-10 13:14:28 您在来信中写道：===
之前我说了从网络和存储两个方面考虑，以下是我测试的数据：
1.KVM虚拟机下用dd命令测试磁盘读写性能:
144MB/S
2.KVM物理主机用dd命令测试磁盘读写性能:
185MB/S
3.通过Web服务器下载大文件到VM(KVM)磁盘时，VM上的统计数据：
[root@evan2 ~]#
你好，按照你的意思，我测试的数据如下：
KVM主机上：
[root@cs tmp]# dd bs=1M count=1000 if=/dev/zero of=test oflag=dsync
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 3.50706 s, 299 MB/s
虚拟机（KVM）上：
[root@cs tmp]# dd bs=1M count=1000 if=/dev/zero of=test oflag=dsync
1000+0 records in
1000+0
Dear CloudstackUsers,
I'm sorry if this question has been asked before, but
I'm extending some vlans inside our cloudstack setup
is there a way to create the network without dhcp services
or virtual router ? and just the vlan tagging ?
I've tried to configure cloudstack with QuickCloud but is
Ivan,
You just need to create a new network offering with no services, and probably
with the specify VLAN option selected.
The thing to be aware of is that even without DHCP enabled, CloudStack will
still 'assign' an IP address which will appear in the UI, but the VM will
obviously need the
Thanks a lot
On Jul 9, 2014 5:54 PM, Geoff Higginbottom
geoff.higginbot...@shapeblue.com wrote:
Ivan,
You just need to create a new network offering with no services, and
probably with the specify VLAN option selected.
The thing to be aware of is that even without DHCP enabled, CloudStack
Hi Rohit,
I am using SBG 10.5.1-2, earlier i tried with other Linux 64 bit but it
didn't help
now I tried to install through Other (64-bit) it worked fine.
Regards,
Tejas
On Tue, Jul 8, 2014 at 2:22 PM, Rohit Yadav rohit.ya...@shapeblue.com
wrote:
Hi Tejas,
Tejas Gadaria wrote:
Hi
Is
From the logs
2014-07-08 12:08:56,218 DEBUG [agent.transport.Request]
(AgentManager-Handler-1:null) Seq 1-277348416: Processing: { Ans: , MgmtId:
159320647860937, via: 1, Ver: v1, Flags: 110,
[{com.cloud.agent.api.Answer:{result:false,details:grep:
/var/lib/misc/dnsmasq.leases: No such file
I don't know - I can't seem to ssh to the link local IP. It pings, but
ssh times out. If I try and use the connect to console button in the
gui, that too times out :(
Elliot
Harikrishna Patnala wrote:
From the logs
2014-07-08 12:08:56,218 DEBUG [agent.transport.Request]
Restart network from cs
On Jul 7, 2014 7:22 PM, =?ISO-8859-1?Q?Carlos_Re=E1tegui?=
create...@gmail.com wrote:
As in service network restart on the hosts or something in the cloudstack UI?
On Jul 7, 2014, at 6:06 AM, Sanjeev Neelarapu sanjeev.neelar...@citrix.com
wrote:
Restart network
1) Log into your KVM host.
2) Use command “virsh list”. This gives the list of VMs on the host.
3) Use command “virsh console VirtualRouterId” to log into the VR.
-Harikrishna
On 09-Jul-2014, at 3:52 pm, Elliot Berg elliot.b...@avcosystems.com wrote:
I don't know - I can't seem to ssh to the
Doh! I did, but forgot about it being on a funny port. Now that I'm into
the VM I can see that it's not running, and fails to start when it tries
to bind to the address that it should have on the guest range. I notice
that ifconfig -a shows two NICs, only one of which is up (the one with
the
Hello.
it's possible to force the installation of a template?
I recently installed and configure my zone. the template of centos started
to download and finished ok.
but on the CS manager in the templates menu (CentOS 5.6(64-bit) no GUI
(XenServer)) show me the status message:
Template download
Hi,
Has rebooting the Secondary Storage VM accomplished anything?
--
Sent from the Delta quadrant using Borg technology!
Nux!
www.nux.ro
- Original Message -
From: Hollman Enciso R. hollman.enc...@gmail.com
To: users@cloudstack.apache.org
Sent: Wednesday, 9 July, 2014 2:52:19 PM
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