Friday Nov 23, 2012

Friday Tips #3

Even though yesterday was Thanksgiving here in the US, we still have a Friday tip for those of you around your computers today. In fact, we have two! The first one came in last week via our #AskOracleVirtualization Twitter hashtag. The tweet has disappeared into the ether now, but we remember the gist, so here it is:


Question:
Will there be an Oracle Virtual Desktop Client for Android?

Answer by our desktop virtualization product development team:
We are looking at Android as a supported platform for future releases.


Question:
How can I make a Sun Ray Client automatically connect to a virtual machine?

Answer by Rick Butland, Principal Sales Consultant, Oracle Desktop Virtualization:
Someone recently asked how they can assign VM’s to specific Sun Ray Desktop Units (“DTU’s”) without any user interfaction being required, without the “Desktop Selector” being displayed, or any User Directory.  That is, they wanted each Sun Ray to power on and immediately connect to a pre-assigned Solaris VM.  

This can be achieved by using “tokens” for user assignment – that is, the tokens found on Smart Cards, DTU’s, or OVDC clients can be used in place of user credentials.  Note, however, that mixing “token-only” assignments and “User Directories” in the same VDI Center won’t work.  

Much of this procedure is covered in the documentation, particularly here. But it can useful to have everything in one place, “cookbook-style”: 

1. Create the “token-only” directory type:

From the VDI administration interface, select:

 “Settings”, “Company”, “New”, select the “None” radio button, and click “Next.”

Enter a name for the new “Company”, and click “Next”, then “Finish.”

2. Create Desktop Providers, Pools, and VM’s as appropriate.

3. Access the Sun Ray administration interface at http://servername:1660 and login using “root” credentials, and access the token-id’s you wish to use for assignment.  If you’re using DTU tokens rather than Smart Card tokens, these can be found under the “Tokens” tab, and “Search-ing” using the “Currently Used Tokens” tab.  DTU’s can be identified by the prefix “psuedo.”   For example:


4. Copy/paste this token into the VDI administrative interface, by selecting “Users”, “New”, and pasting in the token ID, and click “OK” - for example:

5. Assign the token (DTU) to a desktop, that is, in the VDI Admin Gui, select “Pool”, “Desktop”, select the VM, and click "Assign" and select the token you want, for example:


In addition to assigning tokens to desktops, you'll need to bypass the login screen.  To do this, you need to do two things: 

1.  Disable VDI client authentication with: 

/opt/SUNWvda/sbin/vda settings-setprops -p clientauthentication=Disabled

2. Disable the VDI login screen – to do this,  add a kiosk argument of "-n" to the Sun Ray kiosk arguments screen.   You set this on the Sun Ray administration page - "Advanced", "Kiosk Mode", "Edit", and add the “-n” option to the arguments screen, for example:

3.  Restart both the Sun Ray and VDI services:

# /opt/SUNWut/sbin/utstart –c
# /opt/SUNWvda/sbin/vda-service restart


Remember, if you have a question for us, please post on Twitter with our hashtag (again, it's #AskOracleVirtualization), and we'll try to answer it if we can. See you next time!

Friday Nov 16, 2012

Friday tips #2

Welcome to our second Friday tips blog! You can ask us questions using the hash tag #AskOracleVirtualization on Twitter and we'll do our best to answer them.

Today we've got a VDI related question on linked clones:

Question: I want to use linked clones with Oracle Virtual Desktop Infrastructure. What are my options?

Answer by John Renko, Consulting Developer, Oracle:

First, linked clones are available with the Oracle VirtualBox hypervisor only.

Second, your choice of storage will affect the rest of your architecture.

If you are using a SAN presenting ISCSI LUNS, you can have linked clones with a Oracle Enterprise Linux based hypervisor running VirtualBox. OEL will use OCFS2 to allow VirtualBox to create the linked clones. Because of the OCFS2 requirement, a Solaris based VirtualBox hypervisor will not be able to support linked clones on remote ISCSI storage.

If you using the local storage option on your hypervisors, you will have linked clones with Solaris or Linux based hypervisors running VirtualBox.

In all cases, Oracle Virtual Desktop Infrastructure makes the right selection for creating clones - sparse or linked - behind the scenes. Plan your architecture accordingly if you want to ensure you have the higher performing linked clones.

Wednesday Nov 14, 2012

The November 12 Edition is Here - Oracle Virtualization Newsletter

We are pleased to announce the November 2012 edition of the Oracle Virtualization newsletter is now ready for you to read! It has a shiny new look and lots of great content, including:

  • Oracle OpenWorld 2012 highlights and videos
  • Advanced I/O Virtualization Architecture for Consolidating High-Performance Workloads video
  • What's New in Oracle Secure Global Desktop 4.7 video 
  • Self-paced Oracle VM hands on labs news
  • Information on the Oracle VM Storage Connect Plug-in For NetApp Storage
  • Webcasts, white papers, events, and more...

 

Read the November edition here.

Subscribe now

Friday Nov 09, 2012

Welcome to our Friday tips series!

Today we're starting a brand new blog series. For your Friday afternoon reading, we'll be posting a technical tip or question and answer on a technical topic. We'll start by introducing ideas on our own, but we'd really like it if you were involved and asked us questions via Twitter! Tag your tweet with #AskOracleVirtualization and we'll consider your question for the blog.

Today's tip is on Storage and Oracle Virtual Desktop Infrastructure:

Question: I run Oracle Virtual Desktop Infrastructure 3.4.1 on Solaris and use a local ZFS storage pool.  How should I configure my ZFS ARC cache? 

Answer by John Renko, Consulting Developer, Oracle:

Oracle recommends about 5G of ARC cache per template in use to achieve up to a 90% disk read offload. Set your ARC min=max to reserve the maximum amount of your remaining memory for your running VMs. In /etc/system:

set zfs:zfs_arc_min = 5368709120
set zfs:zfs_arc_max = 5368709120

The amount you need to reserve will depend on your template but this has proven to be a great start for a typical windows 7 VM running productivity applications.

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