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From Miguel Angel Martin junquera <mianmarjun.mailingl...@gmail.com>
Subject Re: Pig load data with cassandrastorage and slice filter param
Date Thu, 18 Jul 2013 12:16:34 GMT
hi A:

Thank you for responding to my e-mail.

Sorry if i did not express my questions/doubts well.

I try to use the slice feature with CassandraStorage LOAD but I do not
 know how to do it. I cannot  find any detailed documentation about it.

I found only the  references in my last mail.

Yet i don run any command  because I dont know if Composite  column Family
the best solution to load data filtering range by day, or define
supercolumns  and how this will work  with cassandraStorage-Slice LOADS in
PIG and how to create the LOAD statment with slice in cassandraStorage. So I
am working  *trial and error  method *at this develop.


I will appreciate any help or example how I must define cassandra data CF
for filter by day (composite CF with timestamp or string  with format
YYY-MM-dd  or super column, or any other feature) and  Pig example  that
load cassandra data with slice feature.

Thanks in advance





2013/7/17 aaron morton <aaron@thelastpickle.com>

> Not sure I understand the question. What was the command that failed?
>
> Cheers
>
>
> -----------------
> Aaron Morton
> Cassandra Consultant
> New Zealand
>
> @aaronmorton
> http://www.thelastpickle.com
>
> On 16/07/2013, at 11:03 PM, Miguel Angel Martin junquera <
> mianmarjun.mailinglist@gmail.com> wrote:
>
> > hi all
> >
> > I trying to load data from cassandra with slice params option but ther
> are  no much info about how to use i. I found  only a quick reference in
> readme.txt in cassandra project  .../examples/pig
> >
> > ...
> > Slices on columns can also be specified:
> > grunt> rows = LOAD
> 'cassandra://MyKeyspace/MyColumnFamily?slice_start=C2&slice_end=C4&limit=1&reversed=true'
> USING CassandraStorage();
> > Binary values for slice_start and slice_end can be escaped such as
> '\u0255'
> > ...
> >
> >
> > I want to filter the initial load data by day o range dates and I only
> found this info about cassandra and pig
> >
> >       •
> http://rubyscale.com/blog/2011/03/06/basic-time-series-with-cassandra/
> >       •
> http://www.datastax.com/dev/blog/advanced-time-series-with-cassandra
> >
> >
> > I,m going  to try to do a test with  dummy data with Composite column
> Family like  anuniqueIDGenerate:timestamp for example or
>  anuniqueIDGenerate:stringdate where date is a string with dornat YYY-MM-dd
> for example
> >
> > Another option is use Supercolumn family by day for example ad try to
> use slice with this feature
> >
> >
> > Or another option is create a custom load cassandra but perhaps It´s
> more complex and I could this features.
> >
> > I will appreciate any help or example how I must define cassandra data
> and  Pig example load with slice.
> >
> > Thanks in advance and king regards
> >
> >
> >
>
>

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