Uploaded October 2012 | Updated September 2026, 2 weeks ago
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By jayanth.kurup@techytube, for more from this author visit:
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In this last video of the series we explore the DMVs used to monitor the health of the always on availability groups, the dashboard that summaries the health of the different replicas in the group, How to perform a manual failover and the Always on Availability group listener. The video explore the different DMVs and shows what kind of information is available from them. In addition it also shows the dashboard which uses the same DMVs to summarize the health of the system and how to perform the failover manually when doing rolling patch updates. With that we wind up the series on Always On. As can be seen Always On while being a new feature is based on the traditional high availability solutions and therefore very easy to grasp.
Subscribe to our channel here for notifications on new video trainings. For more videos on technology, visit our website at http://www.techytube.com.
By jayanth.kurup@techytube, for more from this author visit:
techytube.com/author/jayanth.kurup
In this last video of the series we explore the DMVs used to monitor the health of the always on availability groups, the dashboard that summaries the health of the different replicas in the group, How to perform a manual failover and the Always on Availability group listener. The video explore the different DMVs and shows what kind of information is available from them. In addition it also shows the dashboard which uses the same DMVs to summarize the health of the system and how to perform the failover manually when doing rolling patch updates. With that we wind up the series on Always On. As can be seen Always On while being a new feature is based on the traditional high availability solutions and therefore very easy to grasp.








![How to customize the NavBar in iOS
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By pavel@techytube, for more from this author visit:
http://www.techytube.com/author/pavel
The NavBar or the navigation bar is the top side view that appears by default over our main view if we have a navigation controller presenting the corresponding view controller.
Its dimensions for iPhone and iPod touch are 320 x 44, so if we want to set custom background images for that, we need 2 images: one normal of 320 x 44 pixels, and the other one for Retina Display, of 640 x 88 pixels.
iOS provides us 4 default options for customising the NavBar, and we do that by writing the following line of code:
self.navigationController.navigationBar.barStyle = UIBarStyleDefault;
The barStyle property can be set to one of 4 values, which are:
UIBarStyleDefault,
UIBarStyleBlack,
UIBarStyleBlackOpaque,
UIBarStyleBlackTranslucent.
Starting with iOS 5, it is very easy to set a background image for the NavBar in this way:
UIImage *navBarImage = [UIImage imageNamed:@nav-bar-image];
[[UINavigationBar appearance] setBackgroundImage:navBarImage forBarMetrics:UIBarMetricsDefault]; How to customize the NavBar in iOS](https://i.ytimg.com/vi/kjQ4qVGHr9w/mqdefault.jpg)

