private StorageDirView getCandidateDirInTier(StorageTierView tierView, long blockSize) {
    StorageDirView candidateDirView = null;
    long maxFreeBytes = blockSize - 1;
    for (StorageDirView dirView : tierView.getDirViews()) {
      if (dirView.getAvailableBytes() > maxFreeBytes) {
        maxFreeBytes = dirView.getAvailableBytes();
        candidateDirView = dirView;
      }
    }
    return candidateDirView;
  }
private StorageDirView getCandidateDirInTier ( StorageTierView tierView , long blockSize ) { StorageDirView candidateDirView = null ; long maxFreeBytes = blockSize - 1 ; for ( StorageDirView dirView : tierView . getDirViews ( ) ) { if ( dirView . getAvailableBytes ( ) > maxFreeBytes ) { maxFreeBytes = dirView . getAvailableBytes ( ) ; candidateDirView = dirView ; } } return candidateDirView ; }
Finds a directory view in a tier view that has max free space and is able to store the block.

@param tierView the storage tier view
@param blockSize the size of block in bytes
@return the storage directory view if found, null otherwise