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Date: Thu, 26 Nov 2015 17:11:32 +0530
From: "shweta.agrawal" <shweta.agrawal@orkash.com>
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To: user@accumulo.apache.org
Subject: Re: how to maintain versioning in D4M schema?
References: <5656D04A.5010002@orkash.com>
 <CAPx=JkYaMVcq6DD43_sj=hgwSAN8oCveAg8O5fMc4kxM42228A@mail.gmail.com>
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If I append timestamp on rowid. The id which acts as a node will act as 
a different entity.
How this will be maintained?

Thanks
Shweta

On Thursday 26 November 2015 04:50 PM, Dylan Hutchison wrote:
> Hi Shweta,
>
> You have lots of options.  You could append or prepend a timestamp to 
> the rowid or column qualifier.  When prepending to the rowid, you may 
> want to reverse the timestamp in order to better shard your data (that 
> is, prevent all updates at a particular time from going to a single 
> tablet server), at the expense of not being able to do range queries 
> on time periods.  You could also disable or relax the 
> VersioningIterator.  It depends on what you want to do.
>
> On Thu, Nov 26, 2015 at 1:26 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
>
>


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    <div class="moz-cite-prefix">If I append timestamp on rowid. The id
      which acts as a node will act as a different entity. <br>
      How this will be maintained?<br>
      <br>
      Thanks <br>
      Shweta<br>
      <br>
      On Thursday 26 November 2015 04:50 PM, Dylan Hutchison wrote:<br>
    </div>
    <blockquote
cite="mid:CAPx=JkYaMVcq6DD43_sj=hgwSAN8oCveAg8O5fMc4kxM42228A@mail.gmail.com"
      type="cite">
      <div dir="ltr">Hi Shweta,
        <div><br>
        </div>
        <div>You have lots of options.  You could append or prepend a
          timestamp to the rowid or column qualifier.  When prepending
          to the rowid, you may want to reverse the timestamp in order
          to better shard your data (that is, prevent all updates at a
          particular time from going to a single tablet server), at the
          expense of not being able to do range queries on time
          periods.  You could also disable or relax the
          VersioningIterator.  It depends on what you want to do.</div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Thu, Nov 26, 2015 at 1:26 AM,
          shweta.agrawal <span dir="ltr">&lt;<a moz-do-not-send="true"
              href="mailto:shweta.agrawal@orkash.com" target="_blank">shweta.agrawal@orkash.com</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
            <br>
            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.<br>
            <br>
            Is there any way to achieve versioning in D4M schema?<br>
            <br>
            Thanks<span class="HOEnZb"><font color="#888888"><br>
                Shweta<br>
                <br>
              </font></span></blockquote>
        </div>
        <br>
      </div>
    </blockquote>
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