Hi Pushparaj, Based on those steps, isn't the expectation that you end up with a 0.6*size block at the end? Blocks are append only (i.e. only grow in length), so deleting a snapshot cannot result in a block shrinking.
Best, Andrew On Tue, Oct 21, 2014 at 7:20 AM, Pushparaj Motamari <pushpara...@gmail.com> wrote: > Hi, > > Consider the scenario below. > > /A/file.txt in HDFS > > 1. file.txt size = 0.5*(Size of Block). > > 2. Take Snapshot on directory A > > 3. Append to the file.txt, making its size as 0.6*(Size of Block) > > 4. Remove/delete the snapshot on folder taken in step2. > > My Question > -------------------------------- > 1. How does HDFS handle when it has to decrease the size of block, as above > when we delete the snapshot the block size has to be reduces to its > previous size. This code is handled at datanode or Namnode? > > Thank You >
