Displaying 20 results from an estimated 2000 matches similar to: "Optimum Block Size to use"
2015 Aug 19
2
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
2015 Aug 19
1
Optimum Block Size to use
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
2015 Aug 19
0
Optimum Block Size to use
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
2010 May 25
8
Unable to execute a script , Permission denied
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
2015 Jul 04
4
Gracefully powering off system in case of power failure
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.
>
>
>
2015 Apr 14
5
Re: VM Performance using KVM Vs. VMware ESXi
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
2015 Jan 28
8
Very slow disk I/O
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
2015 Apr 14
4
Re: VM Performance using KVM Vs. VMware ESXi
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
2015 Apr 14
2
Re: VM Performance using KVM Vs. VMware ESXi
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,
2015 Apr 08
4
SIGTERM signal to qemu-kvm process
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
2010 Apr 02
5
Could not retrieve mirror list while using yum command
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
2010 May 12
4
Adding Repositories and using yum to download packages
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
2015 Jan 29
3
Very slow disk I/O
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
2015 Apr 13
2
Re: 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
>>
2010 Apr 15
3
Viewing the NTP Server configured
How do i know which NTP server is my linux box contacting to synchronize
its time with that of the server ?
Thanks
Jatin
2010 Apr 22
6
Using Wireshark on CentOS without UI
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
2015 Feb 03
3
Very slow disk I/O
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
2014 Feb 26
4
Static routing on CentOS
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
2015 Jul 04
2
Gracefully powering off system in case of power failure
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
2010 May 24
4
Naming of a Java Process in Linux
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