scaling

I was reading about noSQL and relational DBMSs. After going through many posts, I am not able to find out exactly how noSQL systems perform horizontal scaling and how it is more efficient than RDBMS scaling. After all, RDBMSs also do replication and sharding. How this is fast in case of NoSql? First of all, there is no technology or product called "NoSQL." NoSQL is a broad category describing dozens of different technologies , which each work differently. Please don't use the term "NoSQL" as if it's a single implementation. Most NoSQL products achieve some scalability improvements by

I try to render a local image loaded with a FileReader object on a Canvas on Safari Mobile on iOS6. But every image with data-URL gets rendered vertically scaled. Is this a bug? On Chrome it's rendered correctly. Demo Script ScreenShot from iOS6 (above: Canvas, below: Original Image) Is there any way to work-around this bug? Is this a bug? If I resize the image on the device first with the "PhotoWizard" App (scale it down to 720px width), the Canvas renders it correctly. It seems to be a problem with image size or images taken with the Camera App: Working Demo Script Tried suggestions from

How do I make a background image fit the view but keep its aspect ratio when using <bitmap /> as a background drawable XML? None of <bitmap> 's android:gravity values gives the desired effect. It is impossible to achieve manipulating background attribute within xml-files only. There are two options: You cut/scale the bitmap programmatically with Bitmap.createScaledBitmap(Bitmap src, int dstWidth, int dstHeight, boolean filter) and set it as some View 's background. You use ImageView instead of background placing it as the first layout's element and specify android:scaleType attribute for it:

First of all: what am I trying to do? I have an application to view images. It uses the canvas element to render the image. You can zoom in, you can zoom out, and you can drag it around. This part works perfectly right now. But let's say I have an image with a lot of text. It has a resolution of 1200x1700, and my canvas has 1200x900. Initially, when zoomed out, this leads to a rendered resolution of ~560x800. My actual drawing looks like this: drawImage(src, srcOffsetX, srcOffsetY, sourceViewWidth, sourceViewHeight, destOffsetX, destOffsetY, destWidth, destHeight); Small text on this image

I have a source rectangle and a destination rectangle. I need to find the maximum scale to which the source can be scaled while fitting within the destination rectangle and maintaining its original aspect ratio . Google found one way to do it but I'm not sure if it works in all cases. Here is my home-brewed solution: Calculate Height/Width for each rectangle. This gives the slopes of the diagonals msrc and mdest . If msrc < mdst , scale source width to fit the destination width (and scale height by the same ratio) Otherwise, scale source height to fit the destination height (and scale width by