cf.addColumn(Util.cellname(i), ByteBuffer.allocate(1000), 1);
File dir = cfs.directories.getDirectoryForNewSSTables();
SSTableWriter writer = getWriter(cfs, dir);
for (int i = 0; i < 500; i++)
writer.append(StorageService.getPartitioner().decorateKey(ByteBufferUtil.bytes(i)), cf);
SSTableReader s = writer.openEarly(1000);
assertFileCounts(dir.list(), 2, 3);
for (int i = 500; i < 1000; i++)
writer.append(StorageService.getPartitioner().decorateKey(ByteBufferUtil.bytes(i)), cf);
SSTableReader s2 = writer.openEarly(1000);
assertTrue(s != s2);