Xedotnet: Parallel & MEF session

Last Friday 25th it was time for another Xedotnet meeting.

Mirco Vanini with Parallel Programming, and Andrea Boschin with MEF were the sessions.
Simply unmissable! 😉

Both speakers explained very well how to use those technologies, with tips & tricks to gain the most.

Entity Framework: “Unable to determine a valid ordering for dependent operations. Dependencies may exist due to foreign key constraints, model requirements or store generated values.”

Just for example:
refactoring some stored procedures, in order to get a simpler store procedure mapping,
combining ADD and UPDATE stored procedures in just one sp.

Field ID (int, identity(1,1)) as input parameter, and RETURN value, different by scopes: RETURN value only in ADD mapping,
both ADD ad UPDATE having ID as input parameter.

First tests failed, with this message: “Unable to determine a valid ordering for dependent operations. Dependencies may exist due to foreign key constraints, model requirements or store generated values.” .

Removing ID returned value in ADD action cleared the message, but it was necessary to auto-generate ID. 😦

Technorati Tags: Entity Framework.

New virtualization features with next W2008R2 SP1

Within next SP1, planned next Feb 22, will be released a couple interesting virtualization features in Windows Server

First of all, Dynamic Memory: […] Dynamic Memory then dynamically distributes available memory, as it is needed, to virtual machines running on that host. […] we saw a 40% increase in density from Windows Server 2008 R2 RTM to SP1.[…]
need more ? 😉

The other feature is RemoteFX: […]RemoteFX is an exciting technology that lets you virtualize the Graphical Processing Unit (GPU) on the server side and deliver next-generation[…]

source #1: Windows 7 and Windows Server 2008 R2 SP1 Add New Virtualization Innovations

source#2: Windows Server 2008 R2 and Windows 7 SP1 Releases to Manufacturing Today

Technorati Tags: Windows 2008,HyperV.