code: @Test public void rawtablePerfTest() throws IOException {
    int col=200;
    long sMs=System.currentTimeMillis();
    int fileId=mTfs.createRawTable("/table",col);
    sMs=System.currentTimeMillis();
    RawTable table=mTfs.getRawTable(fileId);
    Assert.assertEquals(col,table.getColumns());
    table=mTfs.getRawTable("/table");
    Assert.assertEquals(col,table.getColumns());
    sMs=System.currentTimeMillis();
    for (int k=0; k < col; k++) {
      RawColumn rawCol=table.getRawColumn(k);
      rawCol.createPartition(0);
      TachyonFile file=rawCol.getPartition(0);
      OutStream outStream=file.getOutStream(WriteType.MUST_CACHE);
      outStream.write(TestUtils.getIncreasingByteArray(10));
      outStream.close();
    }
    sMs=System.currentTimeMillis();
    for (int k=0; k < col; k++) {
      RawColumn rawCol=table.getRawColumn(k);
      TachyonFile file=rawCol.getPartition(0,true);
      TachyonByteBuffer buf=file.readByteBuffer();
      Assert.assertEquals(TestUtils.getIncreasingByteBuffer(10),buf.DATA);
      buf.close();
    }
    sMs=System.currentTimeMillis();
    for (int k=0; k < col; k++) {
      RawColumn rawCol=table.getRawColumn(k);
      TachyonFile file=rawCol.getPartition(0,true);
      TachyonByteBuffer buf=file.readByteBuffer();
      Assert.assertEquals(TestUtils.getIncreasingByteBuffer(10),buf.DATA);
      buf.close();
    }
  }
  