StatusWith<CompactStats> compactCollection(OperationContext* opCtx,
                                           Collection* collection,
                                           const CompactOptions* compactOptions) {
    dassert(opCtx->lockState()->isCollectionLockedForMode(collection->ns().toString(), MODE_X));

    DisableDocumentValidation validationDisabler(opCtx);

    auto recordStore = collection->getRecordStore();
    auto indexCatalog = collection->getIndexCatalog();

    if (!recordStore->compactSupported())
        return StatusWith<CompactStats>(ErrorCodes::CommandNotSupported,
                                        str::stream()
                                            << "cannot compact collection with record store: "
                                            << recordStore->name());

    if (recordStore->compactsInPlace()) {
        CompactStats stats;
        Status status = recordStore->compact(opCtx);
        if (!status.isOK())
            return StatusWith<CompactStats>(status);

        // Compact all indexes (not including unfinished indexes)
        std::unique_ptr<IndexCatalog::IndexIterator> ii(
            indexCatalog->getIndexIterator(opCtx, false));
        while (ii->more()) {
            IndexCatalogEntry* entry = ii->next();
            IndexDescriptor* descriptor = entry->descriptor();
            IndexAccessMethod* iam = entry->accessMethod();

            LOG(1) << "compacting index: " << descriptor->toString();
            Status status = iam->compact(opCtx);
            if (!status.isOK()) {
                error() << "failed to compact index: " << descriptor->toString();
                return status;
            }
        }

        return StatusWith<CompactStats>(stats);
    }

    if (indexCatalog->numIndexesInProgress(opCtx))
        return StatusWith<CompactStats>(ErrorCodes::BadValue,
                                        "cannot compact when indexes in progress");

    std::vector<BSONObj> indexSpecs;
    {
        std::unique_ptr<IndexCatalog::IndexIterator> ii(
            indexCatalog->getIndexIterator(opCtx, false));
        while (ii->more()) {
            IndexDescriptor* descriptor = ii->next()->descriptor();

            // Compact always creates the new index in the foreground.
            const BSONObj spec =
                descriptor->infoObj().removeField(IndexDescriptor::kBackgroundFieldName);
            const BSONObj key = spec.getObjectField("key");
            const Status keyStatus =
                index_key_validate::validateKeyPattern(key, descriptor->version());
            if (!keyStatus.isOK()) {
                return StatusWith<CompactStats>(
                    ErrorCodes::CannotCreateIndex,
                    str::stream() << "Cannot compact collection due to invalid index " << spec
                                  << ": "
                                  << keyStatus.reason()
                                  << " For more info see"
                                  << " http://dochub.mongodb.org/core/index-validation");
            }
            indexSpecs.push_back(spec);
        }
    }

    // Give a chance to be interrupted *before* we drop all indexes.
    opCtx->checkForInterrupt();

    {
        // note that the drop indexes call also invalidates all clientcursors for the namespace,
        // which is important and wanted here
        WriteUnitOfWork wunit(opCtx);
        log() << "compact dropping indexes";
        indexCatalog->dropAllIndexes(opCtx, true);
        wunit.commit();
    }

    CompactStats stats;

    MultiIndexBlockImpl indexer(opCtx, collection);
    indexer.allowInterruption();
    indexer.ignoreUniqueConstraint();  // in compact we should be doing no checking

    Status status = indexer.init(indexSpecs).getStatus();
    if (!status.isOK())
        return StatusWith<CompactStats>(status);

    status = recordStore->compact(opCtx);
    if (!status.isOK())
        return StatusWith<CompactStats>(status);

    log() << "starting index commits";
    status = indexer.dumpInsertsFromBulk();
    if (!status.isOK())
        return StatusWith<CompactStats>(status);

    {
        WriteUnitOfWork wunit(opCtx);
        status = indexer.commit();
        if (!status.isOK()) {
            return StatusWith<CompactStats>(status);
        }
        wunit.commit();
    }

    return StatusWith<CompactStats>(stats);
}
Exemplo n.º 2
0
StatusWith<CompactStats> Collection::compact(OperationContext* txn,
                                             const CompactOptions* compactOptions) {
    dassert(txn->lockState()->isCollectionLockedForMode(ns().toString(), MODE_X));

    DisableDocumentValidation validationDisabler(txn);

    if (!_recordStore->compactSupported())
        return StatusWith<CompactStats>(ErrorCodes::CommandNotSupported,
                                        str::stream()
                                            << "cannot compact collection with record store: "
                                            << _recordStore->name());

    if (_recordStore->compactsInPlace()) {
        CompactStats stats;
        Status status = _recordStore->compact(txn, NULL, compactOptions, &stats);
        if (!status.isOK())
            return StatusWith<CompactStats>(status);

        // Compact all indexes (not including unfinished indexes)
        IndexCatalog::IndexIterator ii(_indexCatalog.getIndexIterator(txn, false));
        while (ii.more()) {
            IndexDescriptor* descriptor = ii.next();
            IndexAccessMethod* index = _indexCatalog.getIndex(descriptor);

            LOG(1) << "compacting index: " << descriptor->toString();
            Status status = index->compact(txn);
            if (!status.isOK()) {
                error() << "failed to compact index: " << descriptor->toString();
                return status;
            }
        }

        return StatusWith<CompactStats>(stats);
    }

    if (_indexCatalog.numIndexesInProgress(txn))
        return StatusWith<CompactStats>(ErrorCodes::BadValue,
                                        "cannot compact when indexes in progress");

    vector<BSONObj> indexSpecs;
    {
        IndexCatalog::IndexIterator ii(_indexCatalog.getIndexIterator(txn, false));
        while (ii.more()) {
            IndexDescriptor* descriptor = ii.next();

            const BSONObj spec = _compactAdjustIndexSpec(descriptor->infoObj());
            const BSONObj key = spec.getObjectField("key");
            const Status keyStatus = validateKeyPattern(key);
            if (!keyStatus.isOK()) {
                return StatusWith<CompactStats>(
                    ErrorCodes::CannotCreateIndex,
                    str::stream() << "Cannot compact collection due to invalid index " << spec
                                  << ": "
                                  << keyStatus.reason()
                                  << " For more info see"
                                  << " http://dochub.mongodb.org/core/index-validation");
            }
            indexSpecs.push_back(spec);
        }
    }

    // Give a chance to be interrupted *before* we drop all indexes.
    txn->checkForInterrupt();

    {
        // note that the drop indexes call also invalidates all clientcursors for the namespace,
        // which is important and wanted here
        WriteUnitOfWork wunit(txn);
        log() << "compact dropping indexes";
        Status status = _indexCatalog.dropAllIndexes(txn, true);
        if (!status.isOK()) {
            return StatusWith<CompactStats>(status);
        }
        wunit.commit();
    }

    CompactStats stats;

    MultiIndexBlock indexer(txn, this);
    indexer.allowInterruption();
    indexer.ignoreUniqueConstraint();  // in compact we should be doing no checking

    Status status = indexer.init(indexSpecs);
    if (!status.isOK())
        return StatusWith<CompactStats>(status);

    MyCompactAdaptor adaptor(this, &indexer);

    status = _recordStore->compact(txn, &adaptor, compactOptions, &stats);
    if (!status.isOK())
        return StatusWith<CompactStats>(status);

    log() << "starting index commits";
    status = indexer.doneInserting();
    if (!status.isOK())
        return StatusWith<CompactStats>(status);

    {
        WriteUnitOfWork wunit(txn);
        indexer.commit();
        wunit.commit();
    }

    return StatusWith<CompactStats>(stats);
}