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Posted to user@accumulo.apache.org by "Hider, Sandy" <Sa...@jhuapl.edu> on 2015/03/24 20:23:43 UTC
Accumulo database type: columnar?
According to Wikipedia: http://en.wikipedia.org/wiki/Apache_Accumulo Accumulo is a column-oriented database. Wikipedia defines column-oriented this way " A column-oriented database serializes all of the values of a column together, then the values of the next column, and so on."
I understand it is possible to store some column related data together with locality groups but wouldn't the default behavior be key/value store type database instead of column-oriented?
Thanks,
Sandy
Re: Accumulo database type: columnar?
Posted by Josh Elser <jo...@gmail.com>.
+1
Kepner, Jeremy - 0553 - MITLL wrote:
> Sounds pretty wrong. I guess someone should fix this.
>
> On Mar 24, 2015, at 3:23 PM, Hider, Sandy<Sa...@jhuapl.edu> wrote:
>
>> According to Wikipedia: http://en.wikipedia.org/wiki/Apache_Accumulo Accumulo is a column-oriented database. Wikipedia defines column-oriented this way " A column-oriented database serializes all of the values of a column together, then the values of the next column, and so on."
>>
>> I understand it is possible to store some column related data together with locality groups but wouldn't the default behavior be key/value store type database instead of column-oriented?
>>
>> Thanks,
>>
>> Sandy
>>
>>
>>
>>
>
Re: Accumulo database type: columnar?
Posted by "Kepner, Jeremy - 0553 - MITLL" <ke...@ll.mit.edu>.
Sounds pretty wrong. I guess someone should fix this.
On Mar 24, 2015, at 3:23 PM, Hider, Sandy <Sa...@jhuapl.edu> wrote:
> According to Wikipedia: http://en.wikipedia.org/wiki/Apache_Accumulo Accumulo is a column-oriented database. Wikipedia defines column-oriented this way " A column-oriented database serializes all of the values of a column together, then the values of the next column, and so on."
>
> I understand it is possible to store some column related data together with locality groups but wouldn't the default behavior be key/value store type database instead of column-oriented?
>
> Thanks,
>
> Sandy
>
>
>
>
Re: Accumulo database type: columnar?
Posted by Billie Rinaldi <bi...@gmail.com>.
Yes. Accumulo's default behavior is sparse row-oriented. If a different
locality group were set up for every column, then it would be
column-oriented. For other locality group configurations it might be
considered a hybrid of row-oriented and column-oriented.
On Tue, Mar 24, 2015 at 12:23 PM, Hider, Sandy <Sa...@jhuapl.edu>
wrote:
> According to Wikipedia: http://en.wikipedia.org/wiki/Apache_Accumulo
> Accumulo is a column-oriented database. Wikipedia defines column-oriented
> this way " A column-oriented database serializes all of the values of a
> column together, then the values of the next column, and so on."
>
> I understand it is possible to store some column related data together
> with locality groups but wouldn't the default behavior be key/value store
> type database instead of column-oriented?
>
> Thanks,
>
> Sandy
>
>
>
>
>
Re: Accumulo database type: columnar?
Posted by John Vines <vi...@apache.org>.
It did say column oriented, i struck that line until we could decide on
something more appropriate, if anything
Sent from my phone, please pardon the typos and brevity.
On Mar 24, 2015 8:23 PM, "Josef Roehrl" <jr...@phemi.com> wrote:
> Actually, the Wikipedia article doesn't say column-oriented. And, anyway,
> it would still be a key/value store notwithstanding data locality groups
> which are just a store efficiency that doesn't change the logical ordering
> of key/values.
>
> On Tue, Mar 24, 2015 at 12:23 PM, Hider, Sandy <Sa...@jhuapl.edu>
> wrote:
>
>> According to Wikipedia: http://en.wikipedia.org/wiki/Apache_Accumulo
>> Accumulo is a column-oriented database. Wikipedia defines column-oriented
>> this way " A column-oriented database serializes all of the values of a
>> column together, then the values of the next column, and so on."
>>
>> I understand it is possible to store some column related data together
>> with locality groups but wouldn't the default behavior be key/value store
>> type database instead of column-oriented?
>>
>> Thanks,
>>
>> Sandy
>>
>>
>>
>>
>>
>
>
> --
>
>
> Josef Roehrl
> Software Developer
> *PHEMI Health Systems*
> 180-887 Great Northern Way
> Vancouver, BC V5T 4T5
> 604-336-1119
> Website <http://www.phemi.com/> Twitter <https://twitter.com/PHEMIHealth>
> Linkedin
> <http://www.linkedin.com/company/3561810?trk=tyah&trkInfo=tarId%3A1403279580554%2Ctas%3Aphemi%20hea%2Cidx%3A1-1-1>
>
>
>
Re: Accumulo database type: columnar?
Posted by Josef Roehrl <jr...@phemi.com>.
Actually, the Wikipedia article doesn't say column-oriented. And, anyway,
it would still be a key/value store notwithstanding data locality groups
which are just a store efficiency that doesn't change the logical ordering
of key/values.
On Tue, Mar 24, 2015 at 12:23 PM, Hider, Sandy <Sa...@jhuapl.edu>
wrote:
> According to Wikipedia: http://en.wikipedia.org/wiki/Apache_Accumulo
> Accumulo is a column-oriented database. Wikipedia defines column-oriented
> this way " A column-oriented database serializes all of the values of a
> column together, then the values of the next column, and so on."
>
> I understand it is possible to store some column related data together
> with locality groups but wouldn't the default behavior be key/value store
> type database instead of column-oriented?
>
> Thanks,
>
> Sandy
>
>
>
>
>
--
Josef Roehrl
Software Developer
*PHEMI Health Systems*
180-887 Great Northern Way
Vancouver, BC V5T 4T5
604-336-1119
Website <http://www.phemi.com/> Twitter <https://twitter.com/PHEMIHealth>
Linkedin
<http://www.linkedin.com/company/3561810?trk=tyah&trkInfo=tarId%3A1403279580554%2Ctas%3Aphemi%20hea%2Cidx%3A1-1-1>