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From Jean-Marc Spaggiari <jean-m...@spaggiari.org>
Subject Re: should i use compression?
Date Wed, 03 Apr 2013 15:01:59 GMT
Is there any documentation anywhere regarding the differences between
PREFIX, DIFF and FAST_DIFF?

2013/4/3 prakash kadel <prakash.kadel@gmail.com>:
> thank you very much.
> i will try with snappy compression with data_block_encoding
>
>
>
>
> On Wed, Apr 3, 2013 at 11:21 PM, Kevin O'dell <kevin.odell@cloudera.com>wrote:
>
>> Prakash,
>>
>>   Yes, I would recommend Snappy Compression.
>>
>> On Wed, Apr 3, 2013 at 10:18 AM, Prakash Kadel <prakash.kadel@gmail.com>
>> wrote:
>> > Thanks,
>> >     is there any specific compression that is recommended of the use
>> case i have?
>> >    Since my values are all null will compression help?
>> >
>> >  I am thinking of using prefix data_block_encoding..
>> > Sincerely,
>> > Prakash Kadel
>> >
>> >
>> > On Apr 3, 2013, at 10:55 PM, Ted Yu wrote:
>> >
>> >> You should use data block encoding (in 0.94.x releases only). It is
>> helpful
>> >> for reads.
>> >>
>> >> You can also enable compression.
>> >>
>> >> Cheers
>> >>
>> >>
>> >> On Wed, Apr 3, 2013 at 6:42 AM, Prakash Kadel <prakash.kadel@gmail.com
>> >wrote:
>> >>
>> >>> Hello,
>> >>>    I have a question.
>> >>>    I have a table where i store data in the column qualifiers(the
>> values
>> >>> itself are null).
>> >>>    I just have 1 column family.
>> >>>   The number of columns per row is variable (1~ few thousands)
>> >>>
>> >>> Currently i don't use compression or the data_block_encoding.
>> >>>
>> >>> Should i?
>> >>> I want to have faster reads.
>> >>>
>> >>> Please suggest.
>> >>>
>> >>>
>> >>> Sincerely,
>> >>> Prakash Kadel
>> >
>>
>>
>>
>> --
>> Kevin O'Dell
>> Systems Engineer, Cloudera
>>

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