my personal blog about systemcenter

Archive for December, 2013

New Service Manager Book out from Microsoft Press

Categories: Book, Service Manager, Thomas Ellerman
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Hi All

Thomas Ellerman , Kathleen Wilsen , Karsten Nielsen and John Clark have written a book for Microsoft Press and edition by Mitch Tulloch

Microsoft System Center: Optimizing Service Manager

Its a free ebook so just in time for a early xmas gift for all your friends :)

http://shop.oreilly.com/product/0790145396716.do , the book is out in print for about 2 cups of coffee

Changes in Hyper-V Backup in 2012 R2

Categories: Broken, Data Protection Manager, DPM, Hyper-V, Windows Server 2012, Windows Server 2012 R2
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Aidan Finn pointed out in a recent post that there are changes in 2012 R2 Backup of Virtual Machines

http://www.aidanfinn.com/?p=15759 , as always its a good read

One change is that we rely on snapshots on the virtual machine what this looks like from a backup point of view

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Create the Backup Job

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Start the Backup

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We can now see that a snapshot is being created will redirect write IO to the avhdx files

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We can see the avhdx files created when the backup starts

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And after the backup is complete the snapshot is being merged

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Creating a additional backup

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Repeats the pattern , shapshot backup cleanup

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For recovery we can see the snapshots created during backup and a full recovery restores both vhdx and the xvhdx file

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DPM == Sucess

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And when we start the recovered VM it merges the delta files , and we can start the VM again

VM was consistent and didnt show any unexepted shutdown error when restarted

Oracle Linux Kernel Panic Hyper-V Numa

Categories: Uncategorized
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We ran into a issue that was resolved with our good friends from Microsoft , (thanks Michael and Tomas)

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As soon as we went beyond the first numa node memory config we had a kernel panic

PANIC: Early exception 06 rip 10:ffffffff81c451bb error 0 cr2 0″

Long story short if you suck as much using VI as i do then DONT :)

Stick to the GUI instead , and leave the Linux for others

Hint to find this

[[email protected] ~]# cat /proc/cmdline

ro root=/dev/sda1 rhgb quiet numa=off

When we first booted after we thought we edited the setting we couldnt see numa=off at boot

So back to GUI for me at least

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go to /etc/grub.conf

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add numa=off on the kernel boot parameter

shutdown

add memory to span numa nodes

and reboot

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and sucess

Oracle Enterprise Linux 6.4 running in Hyper-V spanning numa nodes on memory