Examples with SnapshotMetadata org.apache.samza.storage.blobstore.index.SnapshotMetadata used on opensource projects

Example 6 with SnapshotMetadata

use of org.apache.samza.storage.blobstore.index.SnapshotMetadata in project samza by apache.

the class TestBlobStoreRestoreManager method testRestoreSkipsStoresWithMissingCheckpointSCM.

@Test
public void testRestoreSkipsStoresWithMissingCheckpointSCM() {
    // store renamed from oldStoreName to newStoreName. No SCM for newStoreName in previous checkpoint.
    String jobName = "testJobName";
    String jobId = "testJobId";
    TaskName taskName = mock(TaskName.class);
    BlobStoreRestoreManagerMetrics metrics = new BlobStoreRestoreManagerMetrics(new MetricsRegistryMap());
    metrics.initStoreMetrics(ImmutableList.of("newStoreName"));
    // new store in config
    Set<String> storesToRestore = ImmutableSet.of("newStoreName");
    SnapshotIndex snapshotIndex = mock(SnapshotIndex.class);
    Map<String, Pair<String, SnapshotIndex>> prevStoreSnapshotIndexes = mock(Map.class);
    when(prevStoreSnapshotIndexes.containsKey("newStoreName")).thenReturn(false);
    DirIndex dirIndex = mock(DirIndex.class);
    when(snapshotIndex.getDirIndex()).thenReturn(dirIndex);
    CheckpointId checkpointId = CheckpointId.create();
    when(snapshotIndex.getSnapshotMetadata()).thenReturn(new SnapshotMetadata(checkpointId, "jobName", "jobId", "taskName", "storeName"));
    Path loggedBaseDir = mock(Path.class);
    // create store dir to be deleted during restore
    StorageConfig storageConfig = mock(StorageConfig.class);
    StorageManagerUtil storageManagerUtil = mock(StorageManagerUtil.class);
    BlobStoreUtil blobStoreUtil = mock(BlobStoreUtil.class);
    DirDiffUtil dirDiffUtil = mock(DirDiffUtil.class);
    BlobStoreRestoreManager.restoreStores(jobName, jobId, taskName, storesToRestore, prevStoreSnapshotIndexes, loggedBaseDir.toFile(), storageConfig, metrics, storageManagerUtil, blobStoreUtil, dirDiffUtil, EXECUTOR);
    // verify that we checked the previously checkpointed SCMs.
    verify(prevStoreSnapshotIndexes, times(1)).containsKey(eq("newStoreName"));
    // verify that the store directory restore was never called
    verify(blobStoreUtil, times(0)).restoreDir(any(File.class), any(DirIndex.class), any(Metadata.class));
}

Example 7 with SnapshotMetadata

use of org.apache.samza.storage.blobstore.index.SnapshotMetadata in project samza by apache.

the class TestBlobStoreBackupManager method setupRemoteAndLocalSnapshots.

private Map<String, Pair<String, SnapshotIndex>> setupRemoteAndLocalSnapshots(boolean addPrevCheckpoints) throws IOException {
    // reset blob store
    testBlobStore = new HashMap<>();
    Map<String, Pair<String, SnapshotIndex>> indexBlobIdAndRemoteAndLocalSnapshotMap = new HashMap<>();
    List<String> localSnapshots = new ArrayList<>();
    List<String> previousRemoteSnapshots = new ArrayList<>();
    localSnapshots.add("[a, c, z/1, y/2, p/m/3, q/n/4]");
    previousRemoteSnapshots.add("[a, b, z/1, x/5, p/m/3, r/o/6]");
    localSnapshots.add("[a, c, z/1, y/1, p/m/1, q/n/1]");
    previousRemoteSnapshots.add("[a, z/1, p/m/1]");
    localSnapshots.add("[z/i/1, y/j/1]");
    previousRemoteSnapshots.add("[z/i/1, x/k/1]");
    // setup local and corresponding remote snapshots
    for (int i = 0; i < localSnapshots.size(); i++) {
        Path localSnapshot = BlobStoreTestUtil.createLocalDir(localSnapshots.get(i));
        String testLocalSnapshot = localSnapshot.toAbsolutePath().toString();
        DirIndex dirIndex = BlobStoreTestUtil.createDirIndex(localSnapshots.get(i));
        SnapshotMetadata snapshotMetadata = new SnapshotMetadata(checkpointId, jobName, jobId, taskName, testLocalSnapshot);
        Optional<String> prevCheckpointId = Optional.empty();
        if (addPrevCheckpoints) {
            prevCheckpointId = Optional.of(prevSnapshotIndexBlobId + "-" + i);
            DirIndex prevDirIndex = BlobStoreTestUtil.createDirIndex(previousRemoteSnapshots.get(i));
            testBlobStore.put(prevCheckpointId.get(), new SnapshotIndex(clock.currentTimeMillis(), snapshotMetadata, prevDirIndex, Optional.empty()));
        }
        SnapshotIndex testRemoteSnapshot = new SnapshotIndex(clock.currentTimeMillis(), snapshotMetadata, dirIndex, prevCheckpointId);
        indexBlobIdAndRemoteAndLocalSnapshotMap.put("blobId-" + i, Pair.of(testLocalSnapshot, testRemoteSnapshot));
        testBlobStore.put("blobId-" + i, testRemoteSnapshot);
    }
    return indexBlobIdAndRemoteAndLocalSnapshotMap;
}

Example 8 with SnapshotMetadata

use of org.apache.samza.storage.blobstore.index.SnapshotMetadata in project samza by apache.

the class BlobStoreBackupManager method upload.

@Override
public CompletableFuture<Map<String, String>> upload(CheckpointId checkpointId, Map<String, String> storeSCMs) {
    long uploadStartTime = System.nanoTime();
    // reset gauges for each upload
    metrics.filesToUpload.getValue().set(0L);
    metrics.bytesToUpload.getValue().set(0L);
    metrics.filesUploaded.getValue().set(0L);
    metrics.bytesUploaded.getValue().set(0L);
    metrics.filesRemaining.getValue().set(0L);
    metrics.bytesRemaining.getValue().set(0L);
    metrics.filesToRetain.getValue().set(0L);
    metrics.bytesToRetain.getValue().set(0L);
    // This map is used to atomically replace the prevStoreSnapshotIndexesFuture map at the end of the task commit
    Map<String, CompletableFuture<Pair<String, SnapshotIndex>>> storeToSCMAndSnapshotIndexPairFutures = new HashMap<>();
    // This map is used to return serialized State Checkpoint Markers to the caller
    Map<String, CompletableFuture<String>> storeToSerializedSCMFuture = new HashMap<>();
    storesToBackup.forEach((storeName) -> {
        long storeUploadStartTime = System.nanoTime();
        try {
            // metadata for the current store snapshot to upload
            SnapshotMetadata snapshotMetadata = new SnapshotMetadata(checkpointId, jobName, jobId, taskName, storeName);
            // get the local store dir corresponding to the current checkpointId
            File storeDir = storageManagerUtil.getTaskStoreDir(loggedStoreBaseDir, storeName, taskModel.getTaskName(), taskModel.getTaskMode());
            String checkpointDirPath = storageManagerUtil.getStoreCheckpointDir(storeDir, checkpointId);
            File checkpointDir = new File(checkpointDirPath);
            LOG.debug("Got task: {} store: {} storeDir: {} and checkpointDir: {}", taskName, storeName, storeDir, checkpointDir);
            // guaranteed to be available since a new task commit may not start until the previous one is complete
            Map<String, Pair<String, SnapshotIndex>> prevStoreSnapshotIndexes = prevStoreSnapshotIndexesFuture.get(0, TimeUnit.MILLISECONDS);
            // get the previous store directory contents
            DirIndex prevDirIndex;
            if (prevStoreSnapshotIndexes.containsKey(storeName)) {
                prevDirIndex = prevStoreSnapshotIndexes.get(storeName).getRight().getDirIndex();
            } else {
                // no previous SnapshotIndex means that this is the first commit for this store. Create an empty DirIndex.
                prevDirIndex = new DirIndex(checkpointDir.getName(), Collections.emptyList(), Collections.emptyList(), Collections.emptyList(), Collections.emptyList());
            }
            long dirDiffStartTime = System.nanoTime();
            // get the diff between previous and current store directories
            DirDiff dirDiff = DirDiffUtil.getDirDiff(checkpointDir, prevDirIndex, DirDiffUtil.areSameFile(false));
            metrics.storeDirDiffNs.get(storeName).update(System.nanoTime() - dirDiffStartTime);
            DirDiff.Stats stats = DirDiff.getStats(dirDiff);
            updateStoreDiffMetrics(storeName, stats);
            metrics.filesToUpload.getValue().addAndGet(stats.filesAdded);
            metrics.bytesToUpload.getValue().addAndGet(stats.bytesAdded);
            // Note: FilesRemaining metric is set to FilesAdded in the beginning of the current upload and then counted down
            // for each upload.
            metrics.filesRemaining.getValue().addAndGet(stats.filesAdded);
            metrics.bytesRemaining.getValue().addAndGet(stats.bytesAdded);
            metrics.filesToRetain.getValue().addAndGet(stats.filesRetained);
            metrics.bytesToRetain.getValue().addAndGet(stats.bytesRetained);
            // upload the diff to the blob store and get the new directory index
            CompletionStage<DirIndex> dirIndexFuture = blobStoreUtil.putDir(dirDiff, snapshotMetadata);
            CompletionStage<SnapshotIndex> snapshotIndexFuture = dirIndexFuture.thenApplyAsync(dirIndex -> {
                LOG.trace("Dir upload complete. Returning new SnapshotIndex for task: {} store: {}.", taskName, storeName);
                Optional<String> prevSnapshotIndexBlobId = Optional.ofNullable(prevStoreSnapshotIndexes.get(storeName)).map(Pair::getLeft);
                return new SnapshotIndex(clock.currentTimeMillis(), snapshotMetadata, dirIndex, prevSnapshotIndexBlobId);
            }, executor);
            // upload the new snapshot index to the blob store and get its blob id
            CompletionStage<String> snapshotIndexBlobIdFuture = snapshotIndexFuture.thenComposeAsync(si -> {
                LOG.trace("Uploading Snapshot index for task: {} store: {}", taskName, storeName);
                return blobStoreUtil.putSnapshotIndex(si);
            }, executor);
            // save store name and it's SnapshotIndex blob id and SnapshotIndex pair. At the end of the upload, atomically
            // update previous snapshot index map with this.
            CompletableFuture<Pair<String, SnapshotIndex>> scmAndSnapshotIndexPairFuture = FutureUtil.toFutureOfPair(Pair.of(snapshotIndexBlobIdFuture.toCompletableFuture(), snapshotIndexFuture.toCompletableFuture()));
            scmAndSnapshotIndexPairFuture.whenComplete((res, ex) -> {
                long uploadTimeNs = System.nanoTime() - storeUploadStartTime;
                metrics.storeUploadNs.get(storeName).update(uploadTimeNs);
            });
            storeToSCMAndSnapshotIndexPairFutures.put(storeName, scmAndSnapshotIndexPairFuture);
            storeToSerializedSCMFuture.put(storeName, snapshotIndexBlobIdFuture.toCompletableFuture());
        } catch (Exception e) {
            throw new SamzaException(String.format("Error uploading store snapshot to blob store for task: %s, store: %s, checkpointId: %s", taskName, storeName, checkpointId), e);
        }
    });
    // replace the previous storeName to snapshot index mapping with the new mapping.
    this.prevStoreSnapshotIndexesFuture = FutureUtil.toFutureOfMap(storeToSCMAndSnapshotIndexPairFutures);
    return FutureUtil.toFutureOfMap(storeToSerializedSCMFuture).whenComplete((res, ex) -> metrics.uploadNs.update(System.nanoTime() - uploadStartTime));
}

Example 9 with SnapshotMetadata

use of org.apache.samza.storage.blobstore.index.SnapshotMetadata in project samza by apache.

the class TestBlobStoreUtil method testCleanup.

@Test
public void testCleanup() throws IOException, ExecutionException, InterruptedException {
    BlobStoreManager blobStoreManager = mock(BlobStoreManager.class);
    // File, dir and recursive dir added, retained and removed in local
    // Using unique file names since test util uses only the file name (leaf node)
    // as the mock blob id, not the full file path.
    String local = "[a, c, z/1, y/2, p/m/3, q/n/4]";
    String remote = "[a, b, z/1, x/5, p/m/3, r/o/6]";
    String expectedRemoved = "[b, 5, 6]";
    // keep only the last character (the file name).
    SortedSet<String> expectedRemovedFiles = BlobStoreTestUtil.getExpected(expectedRemoved);
    // Set up environment
    Path localSnapshotDir = BlobStoreTestUtil.createLocalDir(local);
    String basePath = localSnapshotDir.toAbsolutePath().toString();
    DirIndex remoteSnapshotDir = BlobStoreTestUtil.createDirIndex(remote);
    SnapshotMetadata snapshotMetadata = new SnapshotMetadata(checkpointId, jobName, jobId, taskName, storeName);
    DirDiff dirDiff = DirDiffUtil.getDirDiff(localSnapshotDir.toFile(), remoteSnapshotDir, (localFile, remoteFile) -> localFile.getName().equals(remoteFile.getFileName()));
    BlobStoreUtil blobStoreUtil = new BlobStoreUtil(blobStoreManager, EXECUTOR, null, null);
    when(blobStoreManager.put(any(InputStream.class), any(Metadata.class))).thenReturn(CompletableFuture.completedFuture("blobId"));
    CompletionStage<DirIndex> dirIndexFuture = blobStoreUtil.putDir(dirDiff, snapshotMetadata);
    DirIndex dirIndex = null;
    try {
        // should be already complete. if not, future composition in putDir is broken.
        dirIndex = dirIndexFuture.toCompletableFuture().get(0, TimeUnit.MILLISECONDS);
    } catch (TimeoutException e) {
        fail("Future returned from putDir should be already complete.");
    }
    // Set up mocks
    SortedSet<String> allDeleted = new TreeSet<>();
    when(blobStoreManager.delete(anyString(), any(Metadata.class))).thenAnswer((Answer<CompletableFuture<Void>>) invocation -> {
        String blobId = invocation.getArgumentAt(0, String.class);
        allDeleted.add(blobId);
        return CompletableFuture.completedFuture(null);
    });
    // Execute
    CompletionStage<Void> cleanUpFuture = blobStoreUtil.cleanUpDir(dirIndex, metadata);
    try {
        // should be already complete. if not, future composition in putDir is broken.
        cleanUpFuture.toCompletableFuture().get(0, TimeUnit.MILLISECONDS);
    } catch (TimeoutException e) {
        fail("Future returned from putDir should be already complete.");
    }
    // Assert
    assertEquals(expectedRemovedFiles, allDeleted);
}

Example 10 with SnapshotMetadata

use of org.apache.samza.storage.blobstore.index.SnapshotMetadata in project samza by apache.

the class TestBlobStoreUtil method testPutDirFailsIfAnyFileUploadFails.

@Test
public void testPutDirFailsIfAnyFileUploadFails() throws IOException, TimeoutException, InterruptedException {
    BlobStoreManager blobStoreManager = mock(BlobStoreManager.class);
    // File, dir and recursive dir added, retained and removed in local
    String local = "[a, b]";
    String remote = "[]";
    // Set up environment
    Path localSnapshotDir = BlobStoreTestUtil.createLocalDir(local);
    String basePath = localSnapshotDir.toAbsolutePath().toString();
    DirIndex remoteSnapshotDir = BlobStoreTestUtil.createDirIndex(remote);
    SnapshotMetadata snapshotMetadata = new SnapshotMetadata(checkpointId, jobName, jobId, taskName, storeName);
    DirDiff dirDiff = DirDiffUtil.getDirDiff(localSnapshotDir.toFile(), remoteSnapshotDir, (localFile, remoteFile) -> localFile.getName().equals(remoteFile.getFileName()));
    // Set up mocks
    SamzaException exception = new SamzaException("Error uploading file");
    CompletableFuture<String> failedFuture = new CompletableFuture<>();
    failedFuture.completeExceptionally(exception);
    when(blobStoreManager.put(any(InputStream.class), any(Metadata.class))).thenAnswer((Answer<CompletableFuture<String>>) invocation -> {
        Metadata metadata = invocation.getArgumentAt(1, Metadata.class);
        String path = metadata.getPayloadPath();
        if (path.endsWith("a")) {
            return CompletableFuture.completedFuture("aBlobId");
        } else {
            return failedFuture;
        }
    });
    // Execute
    BlobStoreUtil blobStoreUtil = new BlobStoreUtil(blobStoreManager, EXECUTOR, null, null);
    CompletionStage<DirIndex> dirIndexFuture = blobStoreUtil.putDir(dirDiff, snapshotMetadata);
    try {
        // should be already complete. if not, future composition in putDir is broken.
        dirIndexFuture.toCompletableFuture().get(0, TimeUnit.MILLISECONDS);
    } catch (ExecutionException e) {
        Throwable cause = e.getCause();
        // Assert that the result future fails and that the cause is propagated correctly
        assertEquals(exception, cause);
        return;
    }
    fail("DirIndex future should have been completed with an exception");
}