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Accumulo, mail # user - 'Redundant' mutations


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Re: 'Redundant' mutations
Benson Margulies 2012-02-09, 14:50
On Thu, Feb 9, 2012 at 9:47 AM, Aaron Cordova <[EMAIL PROTECTED]> wrote:
> You get "a"
>
> By default tables are configured with a "versioning iterator" that filters out all but the latest "version" of a key, meaning the key with the latest timestamp, which provides the cleaning out of redundant keys that differ only in timestamp behavior you describe

I understood that the default was only to see the latest, but does
disk space remain consumed with older ones until something happens, or
does it clean out itself?
.
>
>
> On Feb 9, 2012, at 9:43 AM, Benson Margulies wrote:
>
>> At time 0, I make a Mutation with put("a", "b", "c");
>>
>> At time 1, I do it again.
>>
>> Do I get:
>>
>> a) two copies of the same data with different timestamps?
>>
>> b) an error?
>>
>> c) something else?
>>
>> If the idea I'm looking for is to end up with one item without doing a
>> scan each time to see if it's out there, is there a 'garbage
>> collection' cliche for cleaning out redundant items that differ only
>> in timestamp?
>