Archive | May, 2015

Reset DNS Yosemite

15 May
sudo discoveryutil mdnsflushcache
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Disable Restore Windows

15 May

How to disable the Restore Previous Windows Functions in the MAC OS

  1. Close all Word documents if you can
  2. Click on the Apple symbol and select System Preferences.
  3. Select General in the window that opens.
  4. Ensure that Restore windows when quitting and re-opening apps. Underneath, you will also have an option that allows you to select a number of documents to open. I change this figure to zero. Save the changes.
  5. Now you will need to click on the Apple symbol and System Preferences again. This time, choose Shut down.
  6. Deselect the checkbox beside Reopen windows when logging back in. Complete Shut Down and Restart.
  7. Upon restart,  try launching Word again. This time it should just open up the new document screen.

Enable DNS Yosemite

14 May

sudo discoveryutil mdnsactivedirectory yes

Full credit to stackexchange

Terminal Server Planning

12 May

Here are some bullet points which I recommend to my partners and customers to consider:

  • 2GB Memory (RAM) is the optimum limit for each core of a CPU. E.g. If you have 4 GB RAM then for optimum performance there should be Dual core CPU.
  • 2 Dual Core CPU perform better then single Quad core processor.
  • Recommended bandwidth for LAN of 30 users and WAN of 20 users.  Bandwidth (b) = 100 megabits per second (Mbps) with Latency (l) Less than 5 milliseconds.
  • On a Terminal Server 64 MB per user is the Ideal Memory (RAM) requirement for GP Only use + 2 GB for OS E.g. (100 users * 64) + 2000 = 8.4 GB i.e. 8GB RAM.
  • More applications used (i.e. Office, CAD Apps and etc.) will require more memory per user to be added to this calculation over the 64 MB base memory per user.
  • 15 TS session per CPU core is the optimum performance limit of a Terminal Server.
  • Network should not have more than 5 hops, and latency should be under 100ms.
  • 64 kbps is the Ideal Bandwidth per user session. (256 color, switched network, bitmap caching only)
  • CPU performance degrades if %processor time per core is constantly above 65%.
  • Terminal servers performance doubles when it is running on a X64 HW and OS.