Mailing-List: contact user-help@accumulo.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@accumulo.apache.org
Received-SPF: pass (athena.apache.org: domain of billie.rinaldi@gmail.com
 designates 209.85.219.41 as permitted sender)
MIME-Version: 1.0
In-Reply-To: <5321F7A2.5040602@ccri.com>
References: <5321F7A2.5040602@ccri.com>
Date: Thu, 13 Mar 2014 11:59:45 -0700
Message-ID: 
 <CAF1jEfAH2aJC22LmWOdAVH=2Kyxxy+BYs7Y+Awrj2vU44fw9Yw@mail.gmail.com>
Subject: Re: Too Many Versions!
From: Billie Rinaldi <billie.rinaldi@gmail.com>
To: "user@accumulo.apache.org" <user@accumulo.apache.org>,
 John Armstrong <john.armstrong@ccri.com>
Content-Type: multipart/alternative; boundary=089e015383e485e37904f4818e82

--089e015383e485e37904f4818e82
Content-Type: text/plain; charset=ISO-8859-1

When you say that you have configured your table to keep maxint versions of
each key, do you mean that another versioning iterator already exists on
the table with a different number of max versions?  What is the name and
priority of this iterator?

On Thu, Mar 13, 2014 at 11:23 AM, John Armstrong <jrja@ccri.com> wrote:

> Using Accumulo 1.4.3, I have a table configured to keep Many (maxint)
> versions of each key, with the version being interpreted as a timestamp.
>  Given a set of times I'm interested in, I can pull out the data at exactly
> those times with no problem.
>
> But I also want another behavior: if I don't have a particular time, I
> want to respond with the most recent version of the data.  I'm trying to
> use this code:
>
>   void setScannerForTimestamp(Scanner scanner, DateTime timestamp) {
>     if (timestamp == null) {
>         IteratorSetting cfg = new IteratorSetting(10, "vers",
> VersioningIterator.class)
>         VersioningIterator.setMaxVersions(cfg, 1)
>         scanner.addScanIterator(cfg)
>     } else {
>       TimestampSetIterator.setupIterator(scanner, timestamp)
>     }
>   }
>
> where TimestampSetIterator is my own custom iterator that's already
> working.
>
> In my table, I have 76063 different data points, each with 31 versions.
>  When I pass a null timestamp, I expect to get back 76063 entries.
>  Instead, I get 76063*31 = 2357953 entries.  That is, it looks like the
> table is ignoring the part where I setMaxVersions to 1.  What am I missing?
>

--089e015383e485e37904f4818e82
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div><div>When you say that you have configured your table=
 to keep maxint versions of each key, do you mean that another versioning i=
terator already exists on the table with a different number of max versions=
?=A0 What is the name and priority of this iterator?<br>
</div></div><div><div><div><div><div><div><div class=3D"gmail_extra"><br></=
div><div class=3D"gmail_extra"><div class=3D"gmail_quote">On Thu, Mar 13, 2=
014 at 11:23 AM, John Armstrong <span dir=3D"ltr">&lt;<a href=3D"mailto:jrj=
a@ccri.com" target=3D"_blank">jrja@ccri.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Using Accumulo 1.4.3, I have a table configu=
red to keep Many (maxint) versions of each key, with the version being inte=
rpreted as a timestamp. =A0Given a set of times I&#39;m interested in, I ca=
n pull out the data at exactly those times with no problem.<br>

<br>
But I also want another behavior: if I don&#39;t have a particular time, I =
want to respond with the most recent version of the data. =A0I&#39;m trying=
 to use this code:<br>
<br>
=A0 void setScannerForTimestamp(Scanner scanner, DateTime timestamp) {<br>
=A0 =A0 if (timestamp =3D=3D null) {<br>
=A0 =A0 =A0 =A0 IteratorSetting cfg =3D new IteratorSetting(10, &quot;vers&=
quot;, VersioningIterator.class)<br>
=A0 =A0 =A0 =A0 VersioningIterator.<u></u>setMaxVersions(cfg, 1)<br>
=A0 =A0 =A0 =A0 scanner.addScanIterator(cfg)<br>
=A0 =A0 } else {<br>
=A0 =A0 =A0 TimestampSetIterator.<u></u>setupIterator(scanner, timestamp)<b=
r>
=A0 =A0 }<br>
=A0 }<br>
<br>
where TimestampSetIterator is my own custom iterator that&#39;s already wor=
king.<br>
<br>
In my table, I have 76063 different data points, each with 31 versions. =A0=
When I pass a null timestamp, I expect to get back 76063 entries. =A0Instea=
d, I get 76063*31 =3D 2357953 entries. =A0That is, it looks like the table =
is ignoring the part where I setMaxVersions to 1. =A0What am I missing?<br>

</blockquote></div><br></div></div></div></div><br></div></div></div></div>

--089e015383e485e37904f4818e82--