Examples with CompactionIterator org.apache.cassandra.db.compaction.CompactionIterator used on opensource projects

Example 16 with CompactionIterator

use of org.apache.cassandra.db.compaction.CompactionIterator in project cassandra by apache.

the class SSTableRewriterTest method testSmallFiles.

@Test
public void testSmallFiles() {
    Keyspace keyspace = Keyspace.open(KEYSPACE);
    ColumnFamilyStore cfs = keyspace.getColumnFamilyStore(CF);
    truncate(cfs);
    cfs.disableAutoCompaction();
    SSTableReader s = writeFile(cfs, 400);
    cfs.addSSTable(s);
    Set<SSTableReader> compacting = Sets.newHashSet(s);
    List<SSTableReader> sstables;
    int files = 1;
    try (ISSTableScanner scanner = s.getScanner();
        CompactionController controller = new CompactionController(cfs, compacting, 0);
        LifecycleTransaction txn = cfs.getTracker().tryModify(compacting, OperationType.UNKNOWN);
        SSTableRewriter rewriter = new SSTableRewriter(txn, 1000, 1000000, false, true);
        CompactionIterator ci = new CompactionIterator(OperationType.COMPACTION, Collections.singletonList(scanner), controller, FBUtilities.nowInSeconds(), UUIDGen.getTimeUUID())) {
        rewriter.switchWriter(getWriter(cfs, s.descriptor.directory, txn));
        while (ci.hasNext()) {
            rewriter.append(ci.next());
            if (rewriter.currentWriter().getOnDiskFilePointer() > 2500000) {
                // all files are now opened early
                assertEquals(files, cfs.getLiveSSTables().size());
                rewriter.switchWriter(getWriter(cfs, s.descriptor.directory, txn));
                files++;
            }
        }
        sstables = rewriter.finish();
    }
    assertEquals(files, sstables.size());
    assertEquals(files, cfs.getLiveSSTables().size());
    LifecycleTransaction.waitForDeletions();
    assertFileCounts(s.descriptor.directory.tryListNames());
    validateCFS(cfs);
}