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Displaying posts with tag: fastbit (reset)
The WARP storage engine beta: columnar storage for MySQL 8 with automatic bitmap indexing

Oracle MySQL is in need of a columnar storage engine for analytics workloads.  A columnar engine (or column store) stores data vertically, that is, it stores all the data associated with a column together, instead of the traditional RDBMS storage method of storing entire rows together, either in a index organized manner, like InnoDB, or in a heap, like MyISAM.  

Columnar storage has the benefit of reducing IO when only a subset of the row is accessed in a query, because only the data for the accessed rows must be read from disk (or cache) instead of having to read entire rows.  Most columnar stores do not support indexes, but WARP does.

WARP is open source

You can find the WARP source code release on GitHub.  Binaries can be provided upon request.  Simply open an issue for your desired Linux distribution, and I will make them available as soon as I can.

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GROUP_CONCAT is very slow. So I used FastBit for the table instead! 43 seconds down to .16!

MySQL always tries to make toast of my good ideas. This is the only time is succeeds in making toast (see bug #2). |

This time I'm working on star schema optimzation (which will be my next blog post). MySQL takes about .24 seconds to project out a list of parts that match a filter, but it takes 43 (not .43, FORTY-THREE) seconds to turn it into a CSV list using GROUP_CONCAT.

  select P_PartKey from part where where P_MFGR = 'MFGR#1' or P_MFGR='MFGR#2';
  399597 rows in set (0.24 sec)

  mysql> select group_concat(P_PartKey) into @pkey from part where P_MFGR = 'MFGR …

[Read more]
GROUP_CONCAT is very slow. So I used FastBit for the table instead! 43 seconds down to .16!

MySQL always tries to make toast of my good ideas. This is the only time is succeeds in making toast (see bug #2). |

This time I'm working on star schema optimzation (which will be my next blog post). MySQL takes about .24 seconds to project out a list of parts that match a filter, but it takes 43 (not .43, FORTY-THREE) seconds to turn it into a CSV list using GROUP_CONCAT.

  select P_PartKey from part where where P_MFGR = 'MFGR#1' or P_MFGR='MFGR#2';
  399597 rows in set (0.24 sec)

  mysql> select group_concat(P_PartKey) into @pkey from part where P_MFGR = 'MFGR …

[Read more]
Showing entries 1 to 3