Examples of org.xtreemfs.babudb.index.reader.InternalMergeIterator

Package org.xtreemfs.babudb.index.reader

Examples of org.xtreemfs.babudb.index.reader.InternalMergeIterator

org.xtreemfs.babudb.index.reader.InternalMergeIterator
Merges an iterator for an in-memory overlay with an iterator for an on-disk index.
The iterator either returns a byte array or a ByteRange object, depending on whether the current element is part of the overlay trees or the on-disk index. The returned keys and values are direct references to the internally used key-value pairs and should hence not be modified. @author stenjan

    public void materializeSnapshot(String targetFile, int snapId) throws IOException {
        
        DiskIndexWriter writer = new DiskIndexWriter(targetFile, maxEntriesPerBlock, compressed,
            maxBlockFileSize);
        
        InternalMergeIterator it = internalPrefixLookup(null, snapId, true);
        writer.writeIndex(it);
        it.free();
    }

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        if (index != null) {
            byte[][] rng = comp.prefixToRange(prefix, ascending);
            diskIndexIterator = index.internalRangeLookup(rng[0], rng[1], ascending);
        }
        
        return new InternalMergeIterator(overlayIterator, diskIndexIterator, comp, NULL_ELEMENT, ascending);
    }

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Related Classes of org.xtreemfs.babudb.index.reader.InternalMergeIterator

org.xtreemfs.babudb.index.LSMTree

java.util.NoSuchElementException

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