return -1;
	protected long update(long p, Value key, byte[] value)		throws ReadOnlyException {		try {			long pos = (long) pageFromPointer(p);			DataPage page = getDataPage(pos);			return update(p, page, key, value);		} catch (BTreeException bte) {			LOG.debug(bte);			return -1;		} catch (IOException ioe) {			LOG.debug(ioe);			return -1;		}	}