similar to: Clock Sources under RHEL/Centos 5.x with KVM and libvirt

I'm wondering under what circumstances the kvm-clock source is exposed to a guest. I've got a bunch of KVM servers running Centos 5.5 and some of the guests have are defaulting to jiffies or apic whilst some are picking up kvm-clock. Looking at the virtual machine definition file there doesn't appear to be a difference, Any where else to look? Steve -- Steven Ellis - Bulletin.Net

Running Centos 5.4 with KVM on a Dell R610 server and I'd like to control which of the four ethernet interfaces are used for specific tasks My ideal configuration would be eth0 - Host traffic only, no virtual guests. Used for guest mirroring and management. eth1 - NAT guest traffic only, no address for local machine and in some environments in the same zone as eth0 eth2/3 - Allocated to two

Are their any good guides out there on how to use ksmctl to enable and tune KSM performance on Centos/RedHat At the moment the only guidelines I can find are from the following OLS paper, plus the Linux Kernel Docs. * http://www.kernel.org/doc/ols/2009/ols2009-pages-19-28.pdf * http://www.kernel.org/doc/Documentation/vm/ksm.txt On a basic dual core testbed with 4GB Ram and 4-5 VMs I've

Is anyone else having major I/O peaks due to logrotate or other jobs running simultaneously across multiple guests. I have one KVM server running Centos 5.4 with local disk that is seriously suffering as most of the guests rotate their syslog at the same time. Looking at the KVM server I'm seeing 11:00:01 PM CPU %user %nice %system %iowait %steal %idle 03:40:01 AM

Has anyone here ran performance comparisons between NFS and iSCSI when using network storage for KVM based guests. Also which have people found to be easier for managing live migrates etc. Steve -- Steven Ellis - Bulletin.Net Inc - http://www.bulletin.net

[ Ingo, Thomas cc'd in case this issue effects normal jiffies clock too? ] When the Host TSC is unreliable or can change, lguest guests use the jiffies clock. However, the clock value seems to creep upwards in sub-jiffies increments, and then tick_handle_periodic() goes into an infinite loop. Instead, the host writes the current time into the lguest page on every interrupt. This

[ Ingo, Thomas cc'd in case this issue effects normal jiffies clock too? ] When the Host TSC is unreliable or can change, lguest guests use the jiffies clock. However, the clock value seems to creep upwards in sub-jiffies increments, and then tick_handle_periodic() goes into an infinite loop. Instead, the host writes the current time into the lguest page on every interrupt. This

I've got a three Centos 5.5 KVM severs, but only one of them is presenting guests with the kvm-clock source. The two servers I'm not seeing kvm-clock on have Athlon x2 64bit processors. The other server with kvm-clock has a Phenom II X6 1090T Processor. I've checked the system configuration and all the boxes have the same set of RPM packages. To confirm that the issue was

Hi everyone: Just a follow up on the fast clock issue: "Can you double-check that 'cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq' outputs the same number as your 'cpuKHZ' setting in your config.ini file?" There is no cpufreq directory under /sys/devices/system/cpu/cpu0; all I see is "cache" (dir), "crash_notes" (a file) and

Hi. I''ve got a strange problem with xen migration under Ubuntu Gutsy 7.10. I have two machines set up with a DRBD 8.2.4 partition shared between them. This uses the new block-drbd feature where you can set a disk partition using something like this disk = [ ''drbd:storm,sda1,w'' ] in the .cfg file. This allows me to do live migration now. However,

Hi all, I order to reach maximum performance on my centos kvm hosts I have use these params: - On /etc/grub.conf: kernel /vmlinuz-2.6.18-164.11.1.el5 ro root=LABEL=/ elevator=deadline quiet - On sysctl.conf # Special network params net.core.rmem_default = 8388608 net.core.wmem_default = 8388608 net.core.rmem_max = 16777216 net.core.wmem_max = 16777216

Hi list, I have a problem with this stuff, i read many documents about it but i would like to know if anyone have got to resolve the problem. The point is that my vm has the clock unsynchronize, i tried many things and it seems that its work fine but im not sure. Now im using ntpd to synchronize the time but im not trust on it because it didnt work before. First, i tried the jiffies on

Dear list(s), we are running a cluster of virtual machines on ganeti 2.15.2 on top of qemu-kvm 2.1.2. Hosts are Debian jessie (Kernel 3.16). We have big trouble with timekeeping on guests, no matter if these guests are lenny, squeeze, wheezy or jessie. Clock drifts heavily on some, others are fine. There is no obvious pattern on which guest this happens and on which not, but it seems the clock

Dear list(s), we are running a cluster of virtual machines on ganeti 2.15.2 on top of qemu-kvm 2.1.2. Hosts are Debian jessie (Kernel 3.16). We have big trouble with timekeeping on guests, no matter if these guests are lenny, squeeze, wheezy or jessie. Clock drifts heavily on some, others are fine. There is no obvious pattern on which guest this happens and on which not, but it seems the clock

All, Could this patch in any way cause problems with samba? Thanks, -- Christopher Barry Manager of Information Systems InfiniCon Systems http://www.infiniconsys.com office:610.233.ISIS (4747) direct:610.233.4870 cell:267.879.8321 -----Original Message----- From: Microsoft [mailto:0_43315_DF3995CE-B70B-4C45-84DF-1BC91F60239E_US@Newsletters.Micr osoft.com] Sent: Wednesday, January 22, 2003

When booting 2.6.37 (from kernel.org) under Xen 4.1, there are apparently issues with timer interrupts being delivered to the dom0. Repeatedly causing an interrupt (for example, the ACPI power button) will allow the system to boot, as does adding "clocksource=jiffies" to the kernel command line. This is only present under Xen, not when booting the same kernel on real hardware. When boot

On Mon, Jun 01, 2015 at 12:21:40PM +0200, Peter B. wrote: > Hi! > > I'm having a very strange problem, and I'm running out of ideas how to > debug it :) > > Whenever I copy large files (several hundred MB/GB per file), it happens > every now and then that some of them have blocks of zeroes in them. If it > happens, it's always between around 50kB and 150kB.

On 06/01/2015 10:41 PM, Jeremy Allison wrote: > What would be helpful is discovering if this is a client or > server bug. Do you get issues when running rsync on a Windows > client against the same Samba share ? It's number 1 on my todo-list to find that out. What I can say so far is, that the Debian 6 client was using the exact same way/versions/tools for years to write to a Windows

It also got the bulletin out to new users without admin intervention. Sent from Mobile ________________________________ From: Doug Hardie<mailto:bc979 at lafn.org> Sent: ?2/?22/?2016 4:02 To: Dovecot Mailing List<mailto:dovecot at dovecot.org>; Timo Sirainen<mailto:tss at iki.fi> Cc: Kevin Kershner<mailto:cstkersh at outlook.com> Subject: Re: Dovecot Bulletin > On 20

-----Original Message----- From: Microsoft Product Security Response Team [mailto:secure@MICROSOFT.COM] Sent: Friday, September 04, 1998 10:52 AM To: MICROSOFT_SECURITY@ANNOUNCE.MICROSOFT.COM Subject: Microsoft Security Bulletin (MS98-013) Microsoft Security Bulletin (MS98-013) -------------------------------------------------------------------- Fix available for Internet Explorer Cross Frame