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Velocity CTP3 Released

Microsoft this week rolled out the next community test version of a distributed cache platform code-named "Velocity" that promises to speed up .NET-based applications.

Velocity CTP3 (Community Technology Preview 3) was published on Tuesday and can be downloaded here. The CTP3 represents pre-beta testing; it's of interest mostly to technical reviewers.

The enhancements in the CTP3 include a new "cache notifications" capability, plus the option to manage cache clusters using SQL Server, according to Microsoft's announcement. Performance and security were also enhanced with this release, the Velocity team indicated. The application programming interfaces were changed to reflect more typical Microsoft namespace conventions.

Microsoft added the cache notifications capability to help avoid retrieving stale data. It also can be used to specify "an event-triggered task" based on when an object is "added, replaced or removed" in the cache, the Velocity team explained.

With CTP3, SQL Server can now be used instead of just the lead hosts for cluster management. Adding SQL Server for cluster management helps ensure that the cluster doesn't go down "due to an insufficient number of (running) lead hosts," according to the Velocity team.

Velocity is a performance improvement utility for .NET-based applications that caches data in memory across machines. Microsoft unveiled the first CTP of Velocity in early June.

The Velocity platform is similar to memcached hash-table technology used to speed up Web sites built on the LAMP (Linux, Apache, MySQL, PHP) stack, according to Dare Obasanjo, a Microsoft program manager for the Contacts team. Velocity instead provides cache support for Web sites using the WISC (Windows, IIS, SQL Server, C#) stack.

Velocity also adds scalability technology to caching. Obasanjo explained that "you can add and remove servers from the cluster and the cache automatically rebalances itself."

About the Author

Kurt Mackie is online news editor for the 1105 Enterprise Computing Group.

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Reader Comments:

Tue, Feb 25, 2014

Hi Jeremy, Rich, and Ranjeev,Thank you for your comments. To anwser your questions:- Adding AF/D to offline storage will be done very soon in the next release, which I am already preparing.- Planning routes by entering identifiers will also be an option soon, although I have to say that due to limited time on my part, I will have to make choices on what I do first. Can I suggest you join the facebook group AviMapGPS? I will have polls on some of these issues, and you can then vote on your favorite features.- Adding maps of the rest of the world is in my plans, but probably not immediate plans. This is technically difficult, because you have to have a good source of digital maps to use, which for the US you can get from the FAA, and in the case of many other countries might not be as centralized. But I will surely investigate what I can do about that.Keep posting and sending comments. This has been very useful so far. http://pobingkuo.com [url=http://bnhina.com]bnhina[/url] [link=http://esrhjfnodg.com]esrhjfnodg[/link]

Mon, Feb 24, 2014

Dear Andy,Actually, I was just testing the app mlyesf in flight today, and both my speed and altitude were displaying correctly (i even made a cool movie, which I am planning to post later on, and I hope this can actually be seen). However, I had the same problem with the heading this is an accuracy issue, which i did not detect in my pre-release tests. I know what is going on and I will apply the correction on the next release (this is due to lack of accuracy on the iPad / iPhone magnetic sensors, and to my choice of NOT showing an heading if the error is greater than 10 degrees). I am setting a lower threshold on the heading accuracy to ~ 15 degrees which should solve the problem on most devices and for most situations; although i cannot guarantee it will work in your case.One other thing I will do is actually use the course (and not the heading) to show the correct orientation of the icon plane. This should work much better, even if your device does not have a good magnetic reading for some reason.Now, the altitude and velocity should be displaying correctly (i just saw it working today for mlyesf). So, my question is: what device are you using? If it is GPS enabled (a 3G model), this information should be there. I am very interested in learning more about this. Would you be so kind to send me details to the e-mail lgscisoft at lgscisoft.com?Thank you for your comment

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