similar to: Optimum Block Size to use

Am 19.08.2015 um 10:24 schrieb John Hodrien <J.H.Hodrien at leeds.ac.uk>: > On Wed, 19 Aug 2015, Jatin Davey wrote: > >> 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

On 8/19/2015 1:54 PM, John Hodrien wrote: > On Wed, 19 Aug 2015, Jatin Davey wrote: > >> 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

On Wed, 19 Aug 2015, Jatin Davey wrote: > 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). Initial thought is, do you really care? 2Mbps

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

On 7/4/2015 1:07 PM, John R Pierce wrote: > On 7/4/2015 12:28 AM, Jatin Davey wrote: >>> >> My server supports ACPI 4.0 standard , Will that be helpful ? > > does `init 0` as a root command cause it to gracefully shut down and > power off ? thats all the ACPI support you need. [Jatin] Yes, init 0 does gracefully shutdown the server and power off. > > >

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 Users 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 space in my system: ********** [root at localhost images]# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1

On 4/14/2015 6:32 PM, Tom Hughes wrote: > On 14/04/15 13:33, Jatin Davey wrote: > >> 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

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 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

Hi I am using CentOS 5.3 and after installing the OS i scrolled to the /etc/yum.repos.d directory and i could not find any repositories being present there. So i googled a bit on adding the repositories and found the link: http://www.osresources.com/index.php?action=artikel&cat=11&id=6&artlang=en then when i try to install the net-snmp package that i require to monitor my box i

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

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 >>

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

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

On 2/2/2015 8:11 PM, Jatin Davey wrote: > disk 252:1 | 0-0-0 | 9XG7TNQVST91000640NS CC03 | Online, Spun Up > disk 252:2 | 0-0-1 | 9XG4M4X3ST91000640NS CC03 | Online, Spun Up > disk 252:3 | 0-1-1 | 9XG4LY7JST91000640NS CC03 | Online, Spun Up > disk 252:4 | 0-1-0 | 9XG51233ST91000640NS CC03 | Online, Spun Up > End of Output ************************** > > Let me know if i need 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

On 7/4/2015 12:27 PM, g wrote: > > On 07/04/15 01:27, Jatin Davey wrote: > <> > >> In case of power failure on this server , how can i make the system to >> shutdown gracefully so that it unmounts the file-system and cleans up >> the required buffers. >> >> My server does have a battery backup so it will help in shutting down >> the system more

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