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From "Nick Bailey (JIRA)" <>
Subject [jira] Commented: (CASSANDRA-1898) json2sstable should support streaming
Date Mon, 24 Jan 2011 16:25:44 GMT


Nick Bailey commented on CASSANDRA-1898:

Jonathan, I wasn't saying json2sstable should handle any corrupt rows. sstable2json already
does though. The problem is it prints invalid json when it encounters them.

Pavel, yeah I think fixing sstable2json is a good approach.

> json2sstable should support streaming
> -------------------------------------
>                 Key: CASSANDRA-1898
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Nick Bailey
>            Assignee: Pavel Yaskevich
>             Fix For: 0.7.1
>         Attachments: CASSANDRA-1898-v2.patch, CASSANDRA-1898-v3.patch, CASSANDRA-1898-v4.patch,
>   Original Estimate: 8h
>          Time Spent: 8h
>  Remaining Estimate: 0h
> json2sstable loads the entire json file into memory. This is so it can sort the file
before creating an sstable. If the file was created using sstable2json and the partitioner
isn't changing, this isn't necessary.  For very large files this means json2sstable requires
a huge amount of memory.
> There should be an option to stream the file. A simple check for out of order keys will
prevent writing bad sstables.
> This should be possible with the SAX style parser available in our current json library.

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