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From "Brian O'Neill" <b...@alumni.brown.edu>
Subject Re: OoM querying very wide-row in CLI
Date Wed, 28 Mar 2012 14:12:52 GMT
Sorry, I didn't realize we weren't hip to pulls yet.

I created a JIRA and attached the patch.
https://issues.apache.org/jira/browse/CASSANDRA-4098

-brian

On Tue, Mar 27, 2012 at 10:42 PM, Brian O'Neill <bone@alumni.brown.edu>wrote:

> Here she is:
> https://github.com/apache/cassandra/pull/8
>
> Verified functionally with the attached data script.
>
> -brian
>
>
>
> On Tue, Mar 27, 2012 at 9:49 PM, Brian O'Neill <bone@alumni.brown.edu>wrote:
>
>> 10-4.  I'll see if I can track it down and submit a pull request that
>> specifies a default if one does not exist.
>>
>> -brian
>>
>> ----
>> Brian O'Neill
>> Lead Architect, Software Development
>> Health Market Science | 2700 Horizon Drive | King of Prussia, PA 19406
>> p: 215.588.6024blog: http://weblogs.java.net/blog/boneill42/
>> blog: http://brianoneill.blogspot.com/
>>
>>
>>
>>
>>
>>
>>
>> On 3/27/12 9:45 PM, "Jonathan Ellis" <jbellis@gmail.com> wrote:
>>
>> >I believe we added support for specifying a column range to the cli
>> >recently.  I don't know if there is a default limit.
>> >
>> >On Tue, Mar 27, 2012 at 8:40 PM, Brian O'Neill <bone@alumni.brown.edu>
>> >wrote:
>> >> Today, running 1.0.7, we saw a node crash with an OutOfMemory.
>> >> We have a single row with ~10million columns in it. (using it as an
>> >>index)
>> >> Accidentally, we attempted to list the CF in CLI that had the wide-row.
>> >>  This caused the CLI to hang and then eventually crashed Cassandra with
>> >>an
>> >> OoM.
>> >>
>> >> I know this is a case of "If it hurts when you do that, don't do that",
>> >>but
>> >> we may want to better protect against it in the CLI and/or the DB.  I
>> >>know
>> >> we limit row counts on lists in CLI.  Do we also limit column counts?
>> >>If
>> >> not, I don't mind submitting a patch for this.
>> >>
>> >> let me know,
>> >> brian
>> >>
>> >> --
>> >> Brian ONeill
>> >> Lead Architect, Health Market Science (http://healthmarketscience.com)
>> >> mobile:215.588.6024
>> >> blog: http://weblogs.java.net/blog/boneill42/
>> >> blog: http://brianoneill.blogspot.com/
>> >
>> >
>> >
>> >--
>> >Jonathan Ellis
>> >Project Chair, Apache Cassandra
>> >co-founder of DataStax, the source for professional Cassandra support
>> >http://www.datastax.com
>>
>>
>>
>
>
> --
> Brian ONeill
> Lead Architect, Health Market Science (http://healthmarketscience.com)
> mobile:215.588.6024
> blog: http://weblogs.java.net/blog/boneill42/
> blog: http://brianoneill.blogspot.com/
>
>


-- 
Brian ONeill
Lead Architect, Health Market Science (http://healthmarketscience.com)
mobile:215.588.6024
blog: http://weblogs.java.net/blog/boneill42/
blog: http://brianoneill.blogspot.com/

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