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Availability is measured in so-called nines notation, that corresponds to the percentage of time that a service is available. For example, if a service is available 99.9% of the time, we can say that has “three-nines availability”. This notation is used to gives us the specific amount of downtime that a service is allowed to have. Next are the availability and downtime calculations for 99% availability to 99.999% availability : 99% availability (two-nines): * 3.65 days/year (of allowed downtime) * 7.20 hours/month * 1.68 hours/week * 14.4 minutes/day 99.9% availability (three-nines): * 8.76 hours/year * 43.8 minutes/month * 10.1 minutes/week * 1.44 minutes/day 99.99% availability (four-nines): * 52.56 minutes/year * 4.38 minutes/month * 1.01 minutes/week * 8.66 seconds/day 99.999% availability (five-nines): * 5.26 minutes/year * 25.9 seconds/month * 6.05 seconds/week * 864.3 mimiseconds/day
C# provides you a way to escape the problematic characters in a string through the ???@??? symbol. Just place it before the string, and the compiler will escape those characters.For e.g. String filePath = @???c:windowssystem32???;Thus you do not have to escape the slashes in the string in the above example.
You can easily access a website’s certificate in Chrome via the developer tools. Go to developer tools (F12), Security tab. In the Security Overview section, choose “view certificate.”
Avoid?Scrolling?in?the?same?document?for?some?information. Using?the windows?”split”?feature?available?in?the?VS.NET IDE?and?you?can?split?the?document?window?into?two?and?have?two?windows?with?the?same?content?aligned?horizontally. You?can?thus?find?the?information?you?were?looking?for?and?avoid?long?scrolls.
Learn how to handle all of the exceptions from your WPF applications in one place. Avoid writing Try/Catch blocks everywhere in your code unless you really need them. Please note:
The sp_spaceused special SQL procedure displays the number of rows, disk space reserved, disk space used by a table, or indexed view in the current database. Here is a small
Spring MVC has implicit CORS support, so to use the controller method CORS configuration with @CrossOrigin annotation in your Spring Boot application does not require any specific configuration. The global
Fields with ‘Bit’ Data Types, when displayed on Web Pages show as True/False. They don’t show the actual ‘0’ / ‘1’. If you are using a DataReader to retrieve such
At times, you may need to edit the background of an image for some quick use. You do not need to learn sophisticated tools such as Photoshop for a quick
Background errors may not reach the main thread unless they are queried for. One needs to use the Error Property of the RunWorkerCompletedEventArgs argument to determine if any errors have
Did you know that you can create Folders with T-SQL? With the help of the built-in Extended Stored Procedure named xp_create_subdir you can. Here is a small example: DECLARE @DBName
The hashing function is used to generate random strings of six characters, that can be numbers or upper and lowercase letters. We need to make sure that a string is
The datatable1.Merge(datatable2) statement will merge datatable2 into datatable1. You cannot retrieve the old values in the datatable1 after the merge happens. A quick way to do that, is by creating
Often, there are multiple collections with the same kind of elements, that we would have to loop on. Instead of writing two for loops over the collections, we can use
When you create the datagridview associate an event handler for its ‘EditingControlShowing’ event. sampleDataGridView.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(DataGridViewEditingControlShowing); And in the event handler add the selectedIndexChanged eventhandler to the combobox. private
There are cases in which you would need the Enter key to operate as the Tab key. In order for the Enter key to be used as a Tab key,
How to set a Java Persistence API hint in Spring: @Override@QueryHints(value = { @QueryHint(name = “org.hibernate.cacheable”, value = “true”)})public List findAll();
You would get the ‘DeletedRowInaccessibleException‘?when you try to access a deleted row in a dataset. To retrieve the information of a deleted row in a dataset, use the overloaded property
/*A UUID is a 36 character string, 32 alphanumeric characters and 4 hypens123e4567-e89b-12d3-a456-426655440000Java supports generation and usage of this using the java.util.UUID class*/public class JavaUUID{ public static void main(String args[])
You can’t use the “Between” keyword in a LINQ query. The sample snippet below shows how you translate between two date fields. DateTime fromDate = DateTime.Now.AddMonths(-3); DateTime endDate = DateTime.Now;
You can use an undocumented Extended Stored Procedure named xp_dirtree to list folders, subfolders, and files for a given path. Xp_dirtree has three parameters that need to be supplied: directory?-
Let’s suppose that we have Flyway installed in D:/Flyway folder: copy the conf/flyway.conf file to a file called conf/prod.conf open it and update the username, password and url properties: flyway.url=jdbc:mysql://localhost:3306/db
A Dataset maintains an index, or many indexes, to facilitate the high performance when it is traversed for data. An example of such a situation is when you use the
public class CompareArrays{ public static void main(String args[]) { compareArrays(); } private static void compareArrays() { int[] intArray1 = new int[5]; int[] intArray2 = new int[5]; //Changing the value so
To copy the HTML document of the WebBrowser control in HTML format, you need to use the IHTMLDocument2 object of the MSHTML class. For this, you need to add a
If you want to move some content to a new page or create a new page, just place the cursor at the desired location and press CTRL and ENTER keys simultaneously. The cursor is also automatically placed in the new page.
Microsoft word gives us various options to change the case of the text. Changing to upper/lower is just a click away. Access the ???change case??? button in the Paragraph ribbon menu, and you will see options like Lower case, Upper case, sentence case. Applying it is very easy as well. Just click on the text on which you want to change the case, and then select an option from the ???change case??? options.
Is there a format/style of the text that you want to quickly copy in Office applications like word, excel, powerpoint etc? Just click on the text from which you want to copy the format, and then click on the ???Format Painter??? button in the clipboard ribbon menu and then click on the text where you want to apply. The format is copied over.
When working with an SQL Output parameters, you need to specify the parameter’s Direction property once you have created it. Here is a nice little example method: private float checkValue()
A list of textboxes available in a Google authentication page can be captured using this snippet of code: driver.get(“https://accounts.google.com/”);List Textbox =driver.findElements(By.xpath(“//script[@type= ‘text/javascript’]”));System.out.println(“Overall textboxes:”+Textbox.size());
