Examples of org.apache.cassandra.db.Directories$SSTableLister

org.apache.cassandra.db.Directories
Encapsulate handling of paths to the data files. The directory layout is the following: //ks/cf1/ks-cf1-hb-1-Data.db /cf2/ks-cf2-hb-1-Data.db ... In addition, more that one 'root' data directory can be specified so that potentially represents multiple locations. Note that in the case of multiple locations, the manifest for the leveled compaction is only in one of the location. Snapshots (resp. backups) are always created along the sstables thare are snapshoted (resp. backuped) but inside a subdirectory named 'snapshots' (resp. backups) (and snapshots are furter inside a subdirectory of the name of the snapshot). This class abstracts all those details from the rest of the code.

    public static void migrateManifests(String keyspace, String columnFamily) throws IOException
    {
        logger.info("Migrating manifest for {}/{}", keyspace, columnFamily);


        snapshotWithoutCFS(keyspace, columnFamily);
        Directories directories = Directories.create(keyspace, columnFamily);
        File manifestFile = directories.tryGetLeveledManifest();
        if (manifestFile == null)
            return;


        LegacyLeveledManifest legacyManifest = new LegacyLeveledManifest(manifestFile);
        for (Map.Entry<Descriptor, Set<Component>> entry : directories.sstableLister().includeBackups(false).skipTemporary(true).list().entrySet())
        {
            Descriptor d = entry.getKey();
            Pair<SSTableMetadata, Set<Integer>> oldMetadata = SSTableMetadata.serializer.deserialize(d, false);
            String metadataFilename = d.filenameFor(Component.STATS);
            LeveledManifest.mutateLevel(oldMetadata, d, metadataFilename, legacyManifest.levelOf(d.generation));

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     * @param columnFamily
     * @throws IOException
     */
    public static void snapshotWithoutCFS(String keyspace, String columnFamily) throws IOException
    {
        Directories directories = Directories.create(keyspace, columnFamily);
        String snapshotName = "pre-sstablemetamigration";
        logger.info("Snapshotting {}, {} to {}", keyspace, columnFamily, snapshotName);


        for (Map.Entry<Descriptor, Set<Component>> entry : directories.sstableLister().includeBackups(false).skipTemporary(true).list().entrySet())
        {
            Descriptor descriptor = entry.getKey();
            File snapshotDirectoryPath = Directories.getSnapshotDirectory(descriptor, snapshotName);
            for (Component component : entry.getValue())
            {
                File sourceFile = new File(descriptor.filenameFor(component));
                File targetLink = new File(snapshotDirectoryPath, sourceFile.getName());
                FileUtils.createHardLink(sourceFile, targetLink);
            }
        }


        File manifestFile = directories.tryGetLeveledManifest();
        if (manifestFile != null)
        {
            File snapshotDirectory = new File(new File(manifestFile.getParentFile(), Directories.SNAPSHOT_SUBDIR), snapshotName);
            File target = new File(snapshotDirectory, manifestFile.getName());
            FileUtils.createHardLink(manifestFile, target);

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            System.exit(1);
        }


        String keyspace = args[1];
        String columnfamily = args[2];
        Directories directories = Directories.create(keyspace, columnfamily);
        boolean foundSSTable = false;
        for (Map.Entry<Descriptor, Set<Component>> sstable : directories.sstableLister().list().entrySet())
        {
            if (sstable.getValue().contains(Component.STATS))
            {
                foundSSTable = true;
                Descriptor descriptor = sstable.getKey();

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    public static void migrateManifests(String keyspace, String columnFamily) throws IOException
    {
        logger.info("Migrating manifest for {}/{}", keyspace, columnFamily);


        snapshotWithoutCFS(keyspace, columnFamily);
        Directories directories = Directories.create(keyspace, columnFamily);
        File manifestFile = directories.tryGetLeveledManifest();
        if (manifestFile == null)
            return;


        LegacyLeveledManifest legacyManifest = new LegacyLeveledManifest(manifestFile);
        for (Map.Entry<Descriptor, Set<Component>> entry : directories.sstableLister().includeBackups(false).skipTemporary(true).list().entrySet())
        {
            Descriptor d = entry.getKey();
            Pair<SSTableMetadata, Set<Integer>> oldMetadata = SSTableMetadata.serializer.deserialize(d, false);
            String metadataFilename = d.filenameFor(Component.STATS);
            LeveledManifest.mutateLevel(oldMetadata, d, metadataFilename, legacyManifest.levelOf(d.generation));

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     * @param columnFamily
     * @throws IOException
     */
    public static void snapshotWithoutCFS(String keyspace, String columnFamily) throws IOException
    {
        Directories directories = Directories.create(keyspace, columnFamily);
        String snapshotName = "pre-sstablemetamigration";
        logger.info("Snapshotting {}, {} to {}", keyspace, columnFamily, snapshotName);


        for (Map.Entry<Descriptor, Set<Component>> entry : directories.sstableLister().includeBackups(false).skipTemporary(true).list().entrySet())
        {
            Descriptor descriptor = entry.getKey();
            File snapshotDirectoryPath = Directories.getSnapshotDirectory(descriptor, snapshotName);
            for (Component component : entry.getValue())
            {
                File sourceFile = new File(descriptor.filenameFor(component));
                File targetLink = new File(snapshotDirectoryPath, sourceFile.getName());
                FileUtils.createHardLink(sourceFile, targetLink);
            }
        }


        File manifestFile = directories.tryGetLeveledManifest();
        if (manifestFile != null)
        {
            File snapshotDirectory = new File(new File(manifestFile.getParentFile(), Directories.SNAPSHOT_SUBDIR), snapshotName);
            if (!snapshotDirectory.exists())
                snapshotDirectory.mkdirs();

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Related Classes of org.apache.cassandra.db.Directories$SSTableLister

org.apache.cassandra.db.compaction.LegacyLeveledManifest

org.apache.cassandra.io.FSWriteError

org.apache.cassandra.tools.SSTableLevelResetter

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