testing_project/Documentation: reference/reference_lua/xlog — English @ Weblate: (...) --- - - {'BODY': {'space_id': 272, 'index

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(...)
---
- - {'BODY':   {'space_id': 272, 'index_base': 1, 'key': ['max_id'],
                'tuple': [['+', 2, 1]]},
     'HEADER': {'type': 'UPDATE', 'timestamp': 1477846870.8541,
                'lsn': 1, 'server_id': 1}}
  - {'BODY':   {'space_id': 280,
                 'tuple': [512, 1, 'tester', 'memtx', 0, {}, []]},
     'HEADER': {'type': 'INSERT', 'timestamp': 1477846870.8597,
                'lsn': 2, 'server_id': 1}}

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	Module xlog
	The xlog module contains one function: ``pairs()``. It can be used to read Tarantool's :ref:`snapshot files<index-box_persistence>` or :ref:`write-ahead-log (WAL) <internals-wal>` files. A description of the file format is in section :ref:`Data persistence and the WAL file format <internals-data_persistence>`.
	Open a file, and allow iterating over one file entry at a time.
	returns
	iterator which can be used in a for/end loop.
	rtype
	`iterator <https://www.lua.org/pil/7.1.html>`_
	Possible errors: File does not contain properly formatted snapshot or write-ahead-log information.
	Example:
	This will read the first write-ahead-log (WAL) file that was created in the :ref:`wal_dir <cfg_basic-wal_dir>` directory in our :ref:`"Getting started" exercises <getting_started>`.
	Each result from ``pairs()`` is formatted with MsgPack so its structure can be specified with :ref:`__serialize <msgpack-serialize>`.
	xlog = require('xlog') t = {} for k, v in xlog.pairs('00000000000000000000.xlog') do table.insert(t, setmetatable(v, { __serialize = "map"})) end return t
	The first lines of the result will look like:
	(...) --- - - {'BODY': {'space_id': 272, 'index_base': 1, 'key': ['max_id'], 'tuple': [['+', 2, 1]]}, 'HEADER': {'type': 'UPDATE', 'timestamp': 1477846870.8541, 'lsn': 1, 'server_id': 1}} - {'BODY': {'space_id': 280, 'tuple': [512, 1, 'tester', 'memtx', 0, {}, []]}, 'HEADER': {'type': 'INSERT', 'timestamp': 1477846870.8597, 'lsn': 2, 'server_id': 1}}

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