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  Lustre file system set for spit 'n' polish

Whamcloud, the startup created in July 2010 to continue development of the open source Lustre supercomputer file system, has secured a $2.1m contract from OpenSFS to spruce it up with new features and functions.Lustre – used on about 60 per cent of the largest supercomputers in the world – is a parallel clustered file system designed for both supporting petabytes of files and giving high-speed access to the data stored on the file system. Lustre was created by Peter Braam...

   TOP500,Cloud,Server,Database,Management     2011-08-25 08:25:14

  Games don’t need to be social

Social games have been a big trend in recent years. Zynga struck it big and now everyone else is trying to emulate them. Unfortunately, the first thing that pops into anyones head when a Zynga game is mentioned is Facebook. Facebook is the platform upon which their success stories like FarmVille were built, but it’s not the reason for their success.Zyngas games work because they are fun. The social connectivity is merely a mechanism to share your enjoyment of the game with other...

   Game,Social,No need,Game design     2011-10-29 07:15:34

  Cache Reheating - Not to be Ignored

An important aspect to keep in mind with databases is the cost of cache reheating after a server restart. Consider the following diagram which shows several cache servers (e.g., memcached) in front of a database server.This sort of setup is common and can work quite well when appropriate; it removes read load from the database and allows more RAM to be utilized for scaling (when the database doesn’t scale horizontally). But what happens if all the cache servers restart at the same time, s...

   Database,Cost,Cache reheating,Advice     2011-09-21 09:47:29

  Surface Pro available in mainland China on April 2

According to 36Kr, the Surface Pro will available in mainland China, Australia, France, Germany, Hong Kong , New Zealand and the United Kingdom starting from the end of March. Now the confirmed news is Surface Pro will be on sale in mainland China at 9:00pm on April 2 officially. The Surface Pro price in the United States is 64GB/$899, 128GB/$999. If it's the same in China, then the cheapest Surface Pro should be nearly ¥5600,the 128 GB Surface Pro will be up to ¥6200.Surface Pro configu...

   Surface Pro,China,Sale     2013-03-28 08:51:00

  Traditional recursion vs Tail recursion

Recursion is a frequently adopted pattern for solving some sort of algorithm problems which need to divide and conquer a big issue and solve the smaller but the same issue first. For example, calculating fibonacci  accumulating sum and calculating factorials. In these kinds of issues, recursion is more straightforward than their loop counterpart. Furthermore, recursion may need less code and looks more concise. For example, let's calculate sum of a set of numbers starting with 0 and st...

   ALGORITHM,RECURSION,TAIL RECURSION,TRADITIONAL RECURSION     2016-09-23 23:54:09

  Difference between sans-serif and serif font

When we design website, we will often need to choose which font to use while displaying contents on the page. Basically what's the criteria for the choice? There are two big families of fonts : sans-serif and serif. We need to first understand what the difference is between these two. The word sans is from French, the meaning of it is without. So the difference between sans-serif and serif is serif font will have lines in all ends of the character while sans-serif fonts don't have. Some examples...

   Sans-serif,Serif,French     2013-06-10 05:11:57

  Designing Great API Docs

Writing documentation is one of those things that is dreaded by many developers. It takes a lot of effort and time to get right. And too often, people take shortcuts. This is sad, because well designed documentation is the key to getting people excited about your project, whether it's open source or a developer focused product. In fact, I argue that the most important piece of UX for a developer product isn't the homepage or the sign up process or the SDK download. It's the API documentati...

   API docs,Design API docs,Advice     2012-03-09 23:15:00

  Apple.com is down

UPDATE : The service is back now! Apple.com is now inaccessible. It shows below "Access denied" message on its official site. It is still unknown why the service is down. And there is no ETA on when the service will be back to normal. From the error message, some people think this happens because Apple uses Akamai's security product and the security policy in place is violated. It's basically a WAF. The big issue is it takes 45 minutes for changes to propagate through Akamai's network. So, you ...

   IPHONE 6S,IPHONE 6S PLUS,APPLE     2015-09-12 00:50:17

  Pinterest announces open registration

Pinterest is on-line for two years. During these two years, it gains big growth, but it needs invitation before you can register on Pinterest. Now Pinterest announces open registration, it means that anyone can register on Pinterest with emails, Facebook or Twitter accounts, no need to get invitation from others. In its official blog, Pinterest says: We’re really excited to have the capacity to offer Pinterest to more people and if you’re a Pinner with friends who’ve been wait...

   Pinterest,Social,Open registration     2012-08-09 01:56:23

  Huawei is open to acquire Nokia

Last night Huawei unveiled a new flagship smartphone Ascend P6 in London. It may be the thinnest smartphone in the world and its potential competitor is Samsung Galaxy S4. Before the press event, an article from FT said that Huawei was open to buy Nokia. "We are considering these sorts of acquisitions,maybe the combination has some synerges but depends on the willingness of Nokia. We are open-minded." remarked by Huawei's Richard Yu. After this news, Nokia's share price surges 11% to $4.10 per ...

   Huawei,Nokia     2013-06-19 00:43:38

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