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From "Andre Turgeon (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-10358) Allow CQLSSTableWriter.Builder to use custom AbstractSSTableSimpleWriter
Date Mon, 02 Nov 2015 18:55:27 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14985731#comment-14985731
] 

Andre Turgeon edited comment on CASSANDRA-10358 at 11/2/15 6:54 PM:
--------------------------------------------------------------------

Thanks for the feedback [~slebresne]. I forgot to mention another requirement I have: I need
to control the level at which a SSTable is created. 
How would you feel about having a SSTableWriter creation strategy? Something like this:

{noformat}
public interface SSTableWriterCreationStrategy {
  SSTableWriter createWriter(File directory, CFMetaData metadata);
} 
{noformat}

I submitted a patch with more details.



was (Author: symbiosix):
Thanks for the feedback [~slebresne]. I forgot to mention another requirement I have: I need
to control the level at which a SSTable is created. 
How would you feel about having a SSTableWriter creation strategy? Something like this:

{quote}
public interface SSTableWriterCreationStrategy {
  SSTableWriter createWriter(File directory, CFMetaData metadata);
} 
{quote}

I submitted a patch with more details.


> Allow CQLSSTableWriter.Builder to use custom AbstractSSTableSimpleWriter 
> -------------------------------------------------------------------------
>
>                 Key: CASSANDRA-10358
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10358
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Andre Turgeon
>            Priority: Minor
>         Attachments: SSTableWriterCreationStrategy.patch, patch.txt
>
>
> I've created a patch for your consideration. 
> This change to CQLSSTableWriter allows for a custom AbstractSSTableSimpleWriter to be
specified. 
> I needed this for a bulkload process I wrote. I believe the change would be beneficial
for other people as well. 
> Below are the reasons I needed a custom implementation of AbstractSSTableSimpleWriter:
> 1) The available implementations of AbstractSSTableSimpleWriter do not provide a way
to specify the filename (or rather revision) of the sstable. I needed to control the name
because my bulkload process write sstables in parallel (on multiple machines) and I wish to
avoid name collisions.
> 2) I discovered a problem with SSTableSimpleUnsortedWriter where it creates invalid level-compaction-style
sstables; It allows a partition to span 2 sstables which violates the "no overlap of token
ranges" constraint of level compaction.   



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