Add simple sharding capabilities for JDBC driver #29
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Great code! I'm using it now on my branch. I did however notice that JdbcDBCreateTable.java wasn't touched and that line 73 uses KEY instead of PRIMARY_KEY. This message is more of a placeholder for a future task. It work great right now as is. |
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…25675 Add simple sharding capabilities for JDBC driver
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Hi Ilya, I just merged your patch to the master branch. This is a really good feature to have. Thanks! |
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…age-lrc-1.8 to v0.17.0.2.1-lrc-hse-1.8.0 * commit '235251333f711c31cd07e9346b24f19c7747be6a': Merge pull request brianfrankcooper#28 in HSE/hse-ycsb from make-package-lrc to v0.17.0-lrc-hse
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This patch adds simple sharding to JDBC driver. After applying this patch is becomes possible to specify several database server URLs:
db.url=jdbc:mysql://192.168.0.101:3306/ycsb,jdbc:mysql://192.168.0.102:3306/ycsb,jdbc:mysql://192.168.0.103:3306/ycsb
Data is sharded using very simple algorithm: shardIndex = Key.hashcode() % shardsNumber. However on large data sets it gives fairly equal distribution across several sharding nodes.
Tested using 3 MySQL instances.