accumulo-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "shweta.agrawal" <shweta.agra...@orkash.com>
Subject Re: how to maintain versioning in D4M schema?
Date Fri, 27 Nov 2015 04:10:21 GMT
I want to maintain 5 versions only and user can enter any number of 
versions but I want to keep only 5 latest version.

On Friday 27 November 2015 09:38 AM, David Medinets wrote:
> Do you want five versions of every entry or will the number of 
> versions vary?
>
> On Thu, Nov 26, 2015 at 10:53 PM, shweta.agrawal 
> <shweta.agrawal@orkash.com <mailto:shweta.agrawal@orkash.com>> wrote:
>
>     Thanks Dylan and David.
>     I can store version information in column family. But my problem
>     is when I have many versions of the same key how will I manage
>     that. In Accumulo versioning I can specify that how many versions
>     I want to manage.
>
>     Suppose I have 10 versions and I only want 5 versions to store,
>     how to manage this in a big table?
>
>     Thanks
>     Shweta
>
>     On Thursday 26 November 2015 10:22 PM, David Medinets wrote:
>>     What are the query patterns? If you are versioning for auditing
>>     then changing the VersioningIterator seems the easiest approach.
>>     You could also store application-specific version information in
>>     the column family. One of the reasons that D4M does not use it is
>>     to allow application-specific uses. Using the CF means that any
>>     applications that understand D4M would not need to change their
>>     queries to adjust for the version information.
>>
>>     On Thu, Nov 26, 2015 at 4:26 AM, shweta.agrawal
>>     <shweta.agrawal@orkash.com <mailto:shweta.agrawal@orkash.com>> wrote:
>>
>>         Hi,
>>
>>         I have my data stored in D4M style. I also want to maintain
>>         versions of different value on the basis of time.  As in D4M
>>         style  data is only in rowid and colQualifier only.
>>
>>         Is there any way to achieve versioning in D4M schema?
>>
>>         Thanks
>>         Shweta
>>
>>
>
>


Mime
View raw message