The Ultimate Guide to High Availability with MariaDB

Comments - TokuDB Differences

8 years, 2 months ago Sergei Khomutov
Re: Check the compression format of the tables

Hi, it does not work for me. Versions : tokudb_version - 5.6.26-74.0 , version mariaDB - 10.1.10-MariaDB-1jessie-log.

I've added --header to tokuftdump command. Finally it works for me :

 mysql -sNe 'SELECT dictionary_name, internal_file_name FROM information_schema.tokudb_file_map WHERE table_dictionary_name = "main" OR table_dictionary_name LIKE "key-%"' |perl -F'\t' -ane '@out=qx(tokuftdump --nodata --header --rootnode /var/lib/mysql/$F[1]); foreach $ftdump (@out) { if($ftdump=~/^ compression_method=([0-9]+)$/) { print $F[0]."\t".$1."\n"; last } }'

And i noticed that changing compression method changes size of table on disk. But command

 SELECT 
    table_name AS `Table`, 
    round(((data_length) / 1024 / 1024), 2) `Table  size in MB` ,
    round(((index_length) / 1024 / 1024), 2) `Index  size in MB` 
FROM information_schema.TABLES 
WHERE table_schema = <table>
order by `Table  size in MB` desc;

shows the same size of tables for different compression methods. Why ?

 
Content reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party.