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Friday, May 31, 2013

MCSA Windows Server 2012

MCSA 2012 in the pocket!

The advantage of this cert is that it opens a way for several MCSE of your choice, see more

Saturday, May 25, 2013

Problem with MacOS 10.7.5

Bumped into a problem described here

Error messages:

5/25/13 12:18:43.043 PM ([53840]) Exited with code: 1
5/25/13 12:18:43.063 PM xpchelper: getpwuid_r() failed for UID: 504, ret: 0, errno: 0

those messages filled up system.log. I could not open terminal or activitymonitor to try to kill opendirectoryd. After power off everything is back to normal. The root cause is unknown.

Learning big numbers with Microsoft

New Microsoft file system ReFS support 18,446,744,073,709,551,616 files in a directory. That is 18 "american quintillions (1018)" . It is funny, but it is much less than "european quintillion (1030) ".

Friday, May 24, 2013

Windows 2012 hyper-v snapshots online merge

If you still suffering from waiting when deleted snapshots in Windows server 2008 will merge and free disk space while VM is turned off,  you may want to know that in Windows server 2012 it is done in the background while VM is up, thanks Microsoft!

Wednesday, May 22, 2013

java.facebookupdate on MacOS

java.facebookupdate is running in the background and requests update from facebook. This is an object that comes when you use facebook video chat. if you want to remove this java object look at /Users/[my username]/Library/LaunchAgents/com.facebook.videochat.[my username].plist  and
/Users/[my username]/Library/Application Support/Facebook/

Delete everything there.

Thursday, May 16, 2013

Hyper-v vhd vs vhdx file format in Windows 2012 and 8

Windows 2012 offers new format of VM disk file vhdx, obviously name inspired by docx xlsx pptx from Office platform.  The main advantage of using vhdx is disk space above 2T. However,  it is also faster due to large block size,  more resilient sure to new disk log, supports natively 4kb sector disks (look for AF in disk specs) and has user defined metadata. There is also a highly expected feature called "Trim/Unmap" - you know it from SSD world - which will notify underlying file system or hardware that free space can be returned to storage.

You can convert from one format to another assuming you have no space limitations. So, you still have vhd? What are you waiting for?

A little dose of cloud humor for today and for the future

WEF Global IT report

WEF published Global IT report 2013. Click on your country to see details:

Thursday, May 9, 2013

installing CentOS 6.4 on Windows 8 Hyper-V

Since this release has integration services build-in, you do not need to do anything except bricolage of NIC cards. Set up VM as usual with legacy network adapter, then when CenOS is up and running, add native network adapter and set statis MAC of the legacy one. Remove legacy adapter and boot up CentOS who will recognize native adapter as eth0. Unlike FreeBSD snapshot-revert works fine in CentOS.
CentOS would also recognize shutdown request from hyper-v manager, however stop-vm powershell cmdlet will just turn off power (looks like stop-vm and GUI commands are not doing the same action).

Tuesday, May 7, 2013

CentOS 6.4 comes with native support for Hyper-V

CentOS 6.4 comes with Linux integration Services build-in.
"Microsoft Hyper-V drivers have been added to allow CentOS to be more efficient as a Virtual Machine when installed on Microsoft Hyper-V server."
Bravo. Will FreeBSD 9.x follow?

The linux kernel 2.6.32 has the hyper-v support and other distributions such as Ubuntu should also be compatible.

FreeBSD 9.1 SU+J issues under Hyper-V

After several days of running freshly installed  FreeBSD 9.1 64bit is showing signs of fatigue - SU+J file system corrupt "panic: ufs_dirbad: .. mangled entry", running fsck -y in a single mode fixed the issues but many installed previously packages, such as ruby, mc were damaged.

Clearly it comes from somewhat poor integration with virtual environment, in this case hyper-v. I will reinstall FreeBSD from scratch and try to disable SU+J to see if it is getting more stable.