similar to: CPU Resource Reservation using KVM

On 4/13/2015 1:18 PM, Kashyap Chamarthy wrote: > On Mon, Apr 13, 2015 at 12:14:12PM +0530, Jatin Davey wrote: >> Hi All >> >> I am new to KVM world. I have been using VMware for about a year. >> >> In VMware world we can reserve cpu resources for a VM. Say for instance if >> we need 4 vCPUs with a total of 8000 GHz then we can mention this >>

On Mon, Apr 13, 2015 at 01:41:59PM +0530, Jatin Davey wrote: > On 4/13/2015 1:18 PM, Kashyap Chamarthy wrote: > >On Mon, Apr 13, 2015 at 12:14:12PM +0530, Jatin Davey wrote: > >>Hi All > >> > >>I am new to KVM world. I have been using VMware for about a year. > >> > >>In VMware world we can reserve cpu resources for a VM. Say for instance if

On Mon, Apr 13, 2015 at 12:14:12PM +0530, Jatin Davey wrote: > Hi All > > I am new to KVM world. I have been using VMware for about a year. > > In VMware world we can reserve cpu resources for a VM. Say for instance if > we need 4 vCPUs with a total of 8000 GHz then we can mention this > configuration in vCenter while creating a VM. This guarantees 8000 GHz of > cpu

Thanks Dominique & Daniel. Looks like i need to upgrade my VMs kernel to make it aware of virtio. Found this information from this link: http://wiki.libvirt.org/page/Virtio#Disk_.28block.29_device_driver I tried without upgrading the Kernel and as soon as i start my VM it got into Kernel Panic. I will try using virtio after upgrading my VMs kernel. Thanks for all the responses and

Hi All I was reading through this: http://kashyapc.com/2011/12/02/little-more-disk-io-perf-improvement-with-fallocateing-a-qcow2-disk/ I was basically searching for pointers on improving disk I/O. I wanted to know the purpose of preallocation=full & preallocation=metadata , What is the difference between them ? and which one would yield a better disk I/O speed ? Appreciate your

Hi I have a linux box which has CentOS running in it. I logged into the box using root and wrote a script in the /home/proc_threads directory. saved the file and quit. I changed the file permissions such that any user could execute it using the "chmod 777 filename" command. When i log out and log in as a non-root user i was not able to execute the script though. Could some one

Hi I am using QEMU 0.12.1 as the hypervisor in my RHEL installation of 6.5. I wanted to know if there are any side-effects with respect to VM image corruption when i use SIGTERM signal to kill a qemu-kvm process which effectively stops my VM running on the host. Appreciate if you can provide me some valuable information in this regard. Thanks Jatin

Hi I wanted to download and install the net-snmp package. Usually on my other CentOS boxes i use the following command to do it: yum install net-snmp I was able to successfully install net-snmp on 4 of my CentOS boxes but not on one of them. It reports me the following error message: [root at localhost yum.repos.d]# yum install net-snmp Loaded plugins: fastestmirror Determining fastest

On 4/14/2015 4:58 PM, Daniel P. Berrange wrote: > On Tue, Apr 14, 2015 at 04:53:52PM +0530, Jatin Davey wrote: >> On 4/14/2015 4:42 PM, Dominique Ramaekers wrote: >>> About Spice: I think it’s good practice to use spice because it improves >>> the performance of the VM in general by improving screen performance. If >>> your VM is constantly displaying output,

Hi All Yesterday i had installed wireshark on my centos box which does not have the GUI , It is actually a hardened box. I installed the tool using the following command: yum install wireshark After installation i dont know how to proceed further in capturing the packets. I basically want to capture packets and copy them onto my windows box. On the windows box i can use the Wireshark UI to

Hi All I have two hosts. Host A and Host B Host A routing table ------------------------ [root at localhost ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 172.29.110.0 172.29.109.1 255.255.255.0 UG 0 0 0 eth0 172.29.109.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0

Hi Not a specific question on CentOS but in general about java processes running on Linux boxes. I have a couple of java processes running on my linux boxes , They basically form a component of a bigger application. My point of interest is to monitor the resource usage of the java processes running on the linux box. So currently when i have these procs running on my box they show up as

How do i know which NTP server is my linux box contacting to synchronize its time with that of the server ? Thanks Jatin

On 1/28/2015 11:07 PM, John R Pierce wrote: > On 1/28/2015 4:32 AM, Jatin Davey wrote: >> I am using RHEL 6.5 on my server. >> >> From top command i can see that the processors in my server are >> spending a lot of time on wait for I/O. >> I can see high percentage in terms of 30-50% on "wa" time. >> >> Here is the df output about the disk

Hi I know we can get the total number of processes running in the system using the 'ps -A' command but is it possible to get the total number of threads running in the system ? Is this information exposed using any of the MIB's ? Thanks Jatin

Hi All We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when our application operates at a certain load i can observe that the disk writes / second is around 2 Mbps (Average). The block size set is 4k ******************* [root at localhost ~]# blockdev --getbsz /dev/sda3 4096

On 2/2/2015 8:52 PM, Jatin Davey wrote: > So , You dont think that any configuration changes like increasing the > number of volumes or anything else will help in reducing the I/O wait > time ? not by much. it might reduce the overhead if you use LVM volumes for virtual disks instead of using files, but if you're doing too much disk IO, there's not much that helps other

Hi All I looked at this page for reference to using virtio drivers on KVM guests. http://wiki.libvirt.org/page/Virtio In the requirements section it is mentioned that we need a virtio compatible guest with kernel >= 2.6.25 One of my guest has this version: [root@localhost ~]# uname -a Linux localhost 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux I was

Hi All My guest is a CentOS 5.4 VM: [root at localhost ~]# uname -a Linux localhost 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux [root at localhost ~]# cat /etc/*release CentOS release 5.4 (Final) I wanted to know if the virtio drivers on this guest are stable. The reason for asking this question is that i found this link:

2015-05-06 9:12 GMT+03:00 Jatin Davey <jashokda@cisco.com>: > My guest is: > > [root@localhost ~]# cat /etc/*release > CentOS release 5.4 (Final) > > Let me know if i need to provide any more information in this regard. In case of centos you can use 2.6.18 because redhat backported all needed virtio drivers from never kernels. -- Vasiliy Tolstov, e-mail: