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MySQL Archive Engine

+2 votes
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I have a customer who is wanting to use the Archive Engine. I have no experience with this engine, other than what I am been reading. Why would I want to use Archive over InnoDB. They are only going to be placing audit information in the table.

posted Sep 17, 2013 by Kumar Mitrasen

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3 Answers

+1 vote

From here:
http://dev.mysql.com/doc/refman/5.0/en/archive-storage-engine.html

The ARCHIVE engine supports INSERT and SELECT , but not DELETE, REPLACE, or UPDATE . It does support ORDER BY operations, BLOB columns, and basically all but spatial data types (see Section 12.16.4.1, “MySQL Spatial Data Types”). The ARCHIVE engine uses row-level locking.

Storage: Rows are compressed as they are inserted. The ARCHIVE engine uses zlib lossless data compression (see http://www.zlib.net/). You can use OPTIMIZE TABLE to analyze the table and pack it into a smaller format (for a reason to use OPTIMIZE TABLE , see later in this section). Beginning with MySQL 5.0.15, the engine also supports CHECK TABLE. There are several types of insertions that are used:

You tell my why a customer who wants to place AUDIT information in a table might want that?

answer Sep 17, 2013 by Mandeep Sehgal
Yea, the more I think about it the more it makes good sense. Are there any special my.cnf setting we should be looking at. We currently have our systems tuned for InnoDB as our primary engine.

Thanks for the feedback.
+1 vote

We use Archive for archive clusters (obviously) and it is a good option to save lot of disk space if you assume the performance can be slightly worse. As someone pointed out, make sure you know which statements you use because ARCHIVE doesn't support all the MySQL ones.

If Archive isn't an option but you still want to save some disk, you can use InnoDB Compression:
http://dev.mysql.com/doc/innodb-plugin/1.0/en/innodb-compression-background.html
http://dev.mysql.com/doc/refman/5.5/en/innodb-compression-internals.html#innodb-compression-internals-storage-btree

In all the tests we did we saw some performance degradation but nothing too serious and nothing we couldn't afford, but if you decide to try this, make sure you do a PoC so you know how it could impact in your scenario.

answer Sep 18, 2013 by Seema Siddique
+1 vote

If you are looking for great compression another option is TokuDB. It supports quicklz, zlib, and lzma compression.

answer Sep 20, 2013 by Luv Kumar
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$ python -m pip install MySQL-python

Collecting MySQL-python
 Downloading MySQL-python-1.2.5.zip (108kB)
 100% | –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ –ˆ| 112kB 260kB/s
 930 [main] python2.7 12948 child_info_fork::abort: address space needed by 'datetime.dll' (0x870000) is already occupied
 Error [Errno 11] Resource temporarily unavailable while executing command python setup.py egg_info
Exception:
Traceback (most recent call last):
 File "/usr/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
 status = self.run(options, args)
 File "/usr/lib/python2.7/site-packages/pip/commands/install.py", line 324, in run
 requirement_set.prepare_files(finder)
 File "/usr/lib/python2.7/site-packages/pip/req/req_set.py", line 380, in prepare_files
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 File "/usr/lib/python2.7/site-packages/pip/req/req_set.py", line 634, in _prepare_file
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 File "/usr/lib/python2.7/site-packages/pip/req/req_set.py", line 129, in prep_for_dist
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 errread, errwrite)
 File "/usr/lib/python2.7/subprocess.py", line 917, in _execute_child
 self.pid = os.fork()
OSError: [Errno 11] Resource temporarily unavailable

Anyone hit similar issue?

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