“Think about the ideal way to write a web app. Write the code to make it happen.”. J'ai une fille qui est en couple depuis 1 an qui est amoureuse de moi, une SM qui est amoureuse de moi, je suis amoureux d'une autre fille mais je suis timide, qu'est. How to align partitions for best performance using parted – Rainbow Chard. There are two common problems when creating partitions in Linux on big storage arrays. The first is easy, and the warning message from fdisk is a bit of a giveaway: WARNING: The size of this disk is 8. TB (7. 97. 00. 04. DOS partition table format can not be used on drives for volumes. 2 paragraphs down in the Novell doc, they link to a python script for calculating partition offsets – looking over the script, it appears to expect bytes as input.Use parted(1) and GUID. GPT). The answer: use parted. Don’t have it? Install it! The second problem is this warning from parted: (parted) mklabel gpt. Warning: The resulting partition is not properly aligned for best performance. Ignore/Cancel?…and no matter what combination of numbers you use, the message just keeps coming back. ![]() It’s tempting to ignore it, but don’t. There are afewposts on the subject, but this one from HP really gets to the guts of the problem. Here’s a quick step- by- step guide to aligning partitions properly. It’s just an abstraction of the HP post, but hopefully easier to follow. This will work for most arrays (in fact it works for all the arrays that I’ve seen); there are more options in HP’s post, but I’ve included the most common configuration here. Get the alignment parameters for your array (remember to replace sdb with the name of your device as seen by the kernel). Add optimal_io_size to alignment_offset and divide the result by physical_block_size. In my case this was (1. This number is the sector at which the partition should start. Your new parted command should look like. The trailing ‘s’ is important: it tells parted that you’re talking about sectors, not bytes or megabytes. If all went well, the partition will have been created with no warnings. You can check the alignment thusly (replacing ‘1’ with the partition number if necessary). As I alluded to before, there are cases where this won’t work: if optimal_io_size is zero, for example, there are other rules to follow. Of course it would be nice if parted could do this—the values are all available as ioctls, after all—but then what would I write about? Tutorial (web. py)Other languages : chinese 简体中文 | français | Bahasa Indonesia | .. Summary. Starting. So you know Python and want to make a website. If you want to do the whole tutorial, you'll need to have installed Python, web. Postgres (or equivalent database and Python driver). See install for details.)Let's get started. Linux Set Serial Port Buffer Size Audio . URL Handling. The most important part of any website is its URL structure.Your URLs aren't just the thing that your visitors see and email to their friends, they also provide a mental model of how your website works. On popular sites like del. URLs are even part of the user interface. URLs. To get started with your web. This imports the web. Now we need to tell web. URL structure. Let's start out with something simple: urls = (. The first part is a regular expressions that matches a URL, like /, /help/faq, /item/(\d+), etc. The parentheses say to capture that piece of the matched data for use later on.The second part is the name of a class to send the request to, like index, view, welcomes.This line says we want the URL / (i.GET and POST: the difference.Now we need to write the index class. Check Domain Name Availability Software Engineering . While most people don't notice it just browsing around, your browser uses a language known as HTTP for communicating with the World Wide Web. The details aren't important, but the basic idea is that Web visitors ask web servers to perform certain functions (like GET or POST) on URLs (like / or /foo? GET is the one we're all familiar with, the one used to request the text of a web page. When you type harvard. Harvard web server to GET /. The second- most famous, POST, is often used when submitting certain kinds of forms, like a request to purchase something. You use POST whenever the act of submitting a request does something (like charge your credit card and process an order). This is key, because GET URLs can be passed around and indexed by search engines, which you definitely want for most of your pages but definitely don't want for things like processing orders (imagine if Google tried to buy everything on your site!). In our web. py code, we make the distinction between the two clear: class index. GET(self). return "Hello, world!". This GET function will now get called by web. GET request for /. Now we need to create an application specifying the urls and a way to tell web. First we tell web. URLs we listed above, looking up the classes in the global namespace of this file. And finally we make sure that web. Now notice that although I've been talking a lot here, we only really have five or so lines of code. That's all you need to make a complete web. For easier access, here's how your code should look like: import web. GET(self). return "Hello, world!". Start the server If you go to your command line and type: $ python code. You now have your web. Visit that URL and you should see "Hello, world!" (You can add an IP address/port after the "code. You can also tell it to run a fastcgi or scgi server.)Note: You can specify the port number to use on the command line like this. Templating. Writing HTML from inside Python can get cumbersome; it's much more fun to write Python from inside HTML. Luckily, web. py makes that pretty easy. Let's make a new directory for our templates (we'll call it templates). Inside, make a new file whose name ends with HTML (we'll call it index. Now, inside, you can just write normal HTML: < em> Hello< /em> , world! Or you can use web. HTML: $def with (name). I just wanted to say < em> hello< /em> to $name. Hello< /em> , world! As you can see, the templates look a lot like Python files except for the def with statement at the top (saying what the template gets called with) and the $s placed in front of any code. Currently, template. Also, note that web. HTML, it will get properly escaped and appear as plain text. If you want to turn this off, write $: name instead of $name. Now go back to code. Under the first line, add: render = web. This tells web. py to look for templates in your templates directory. Then change index. GET to: name = 'Bob'. Visit your site and it should say hello to Bob. But let's say we want to let people enter their own name in. Replace the two lines we added above with: i = web. None). return render. Visit / and it should say hello to the world. Visit /? name=Joe and it should say hello to Joe. Of course, having that ? URL is kind of ugly. Instead, change your URL line at the top to: '/(.*)', 'index'. GET to: def GET(self, name). Now visit /Joe and it should say hello to Joe. If you wish to learn more about web. Forms. The form module of web. If you want to learn more about using the module forms web. Documentation or direct link to Form Library. Databasing. Note: Before you can start using a database, make sure you have the appropriate database library installed. For My. SQL databases, use My. SQLdb and for Postgres use psycopg. First you need to create a database object. Adjust these - - especially username, password, and dbname - - for your setup. My. SQL users will also want to change dbn definition to mysql.)That's all you need to do - - web. Using your database engines admin interface, create a simple table in your database: CREATE TABLE todo (.And an initial row: INSERT INTO todo (title) VALUES ('Learn web.Return to editing code.GET to the following, replacing the entire function: def GET(self).URL handler to take just / as in: '/', 'index'. Serial Zee Tv Jodha Akbar Songs more. Edit and replace the entire contents of index. Visit your site again and you should see your one todo item: "Learn web. Congratulations! You've made a full application that reads from the database. Now let's let it write to the database as well. At the end of index. Add" /> < /p>. And change your URLs list to read: '/', 'index'. You've got to be very careful about those commas. If you omit them, Python adds the strings together and sees '/index/addadd' instead of your list of URLs!)Now add another class: class add. POST(self). i = web. Notice how we're using POST for this?)web. Note: In order to access data from multiple identically- named items, in a list format (e. ID of the new row. URL. Some quick additional notes: db. ID it takes it (or a string WHERE clause) after the table name. Storage objects", which are just like dictionaries except you can do d. This really cleans up some code. You can find the full details on these and all the web. Developingweb. py also has a few tools to help us with debugging. When running with the built- in webserver, it starts the application in debug mode. In debug mode any changes to code and templates are automatically reloaded and error messages will have more helpful information. The debug is not enabled when the application is run in a real webserver. If you want to disable the debug mode, you can do so by adding the following line before creating your application/templates. False. What Next ? This ends the tutorial for now. Take a look at the cookbook and the code examples for lots more cool stuff you can do with web. Also don't forget about the api reference.
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