[jira] [Commented] (CASSANDRA-8225) Production-capable COPY FROM

["Sylvain Lebresne (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-8225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14194433#comment-14194433 ] 

Sylvain Lebresne commented on CASSANDRA-8225:
---------------------------------------------

For what it's worth, I do think we should go with bulk streaming right away. I see no particular point in having multiple code to do bulk loading and so I think we have everything to win in standardizing on only one as soon as possible. Also, since we already have CQLSSTableWriter and sstableloader, I don't think a simple csvloader command line tool (that cqlsh COPY FROM would use) is that much effort either, and so I'm not fan of "stalling" by improving the cqlsh code.

> Production-capable COPY FROM
> ----------------------------
>
>                 Key: CASSANDRA-8225
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8225
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Tools
>            Reporter: Jonathan Ellis
>             Fix For: 2.1.2
>
>
> Via [~schumacr],
> bq. I pulled down a sourceforge data generator and created a moc file of 500,000 rows that had an incrementing sequence number, date, and SSN. I then used our COPY command and MySQL's LOAD DATA INFILE to load the file on my Mac. Results were: 
> {noformat}
> mysql> load data infile '/Users/robin/dev/datagen3.txt'  into table p_test  fields terminated by ',';
> Query OK, 500000 rows affected (2.18 sec)
> {noformat}
> C* 2.1.0 (pre-CASSANDRA-7405)
> {noformat}
> cqlsh:dev> copy p_test from '/Users/robin/dev/datagen3.txt' with delimiter=',';
> 500000 rows imported in 16 minutes and 45.485 seconds.
> {noformat}
> Cassandra 2.1.1:
> {noformat}
> cqlsh:dev> copy p_test from '/Users/robin/dev/datagen3.txt' with delimiter=',';
> Processed 500000 rows; Write: 4037.46 rows/s
> 500000 rows imported in 2 minutes and 3.058 seconds.
> {noformat}
> [jbellis] 7405 gets us almost an order of magnitude improvement.  Unfortunately we're still almost 2 orders slower than mysql.
> I don't think we can continue to tell people, "use sstableloader instead."  The number of users sophisticated enough to use the sstable writers is small and (relatively) decreasing as our user base expands.



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