Return-Path: 
 <commits-return-39764-apmail-cassandra-commits-archive=cassandra.apache.org@cassandra.apache.org>
X-Original-To: apmail-cassandra-commits-archive@www.apache.org
Delivered-To: apmail-cassandra-commits-archive@www.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id 65879846A
	for <apmail-cassandra-commits-archive@www.apache.org>;
 Mon,  5 Sep 2011 19:36:32 +0000 (UTC)
Received: (qmail 37859 invoked by uid 500); 5 Sep 2011 19:36:32 -0000
Delivered-To: apmail-cassandra-commits-archive@cassandra.apache.org
Received: (qmail 37812 invoked by uid 500); 5 Sep 2011 19:36:31 -0000
Mailing-List: contact commits-help@cassandra.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:commits-help@cassandra.apache.org>
List-Unsubscribe: <mailto:commits-unsubscribe@cassandra.apache.org>
List-Post: <mailto:commits@cassandra.apache.org>
List-Id: <commits.cassandra.apache.org>
Reply-To: dev@cassandra.apache.org
Delivered-To: mailing list commits@cassandra.apache.org
Received: (qmail 37804 invoked by uid 99); 5 Sep 2011 19:36:31 -0000
Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 05 Sep 2011 19:36:31 +0000
X-ASF-Spam-Status: No, hits=-2000.5 required=5.0
	tests=ALL_TRUSTED,RP_MATCHES_RCVD
X-Spam-Check-By: apache.org
Received: from [140.211.11.116] (HELO hel.zones.apache.org) (140.211.11.116)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 05 Sep 2011 19:36:30 +0000
Received: from hel.zones.apache.org (hel.zones.apache.org [140.211.11.116])
	by hel.zones.apache.org (Postfix) with ESMTP id CBB5A59A4F
	for <commits@cassandra.apache.org>; Mon,  5 Sep 2011 19:36:09 +0000 (UTC)
Date: Mon, 5 Sep 2011 19:36:09 +0000 (UTC)
From: "Mck SembWever (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: 
 <1025892400.17952.1315251369830.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <51169623.16795.1315208350531.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (CASSANDRA-3136) Allow CFIF to keep going
 despite unavailable ranges
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394


    [ https://issues.apache.org/jira/browse/CASSANDRA-3136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13097280#comment-13097280 ] 

Mck SembWever commented on CASSANDRA-3136:
------------------------------------------

Ok... it was mentioned in CASSANDRA-2388 (by Patrik Modesto). but no one there paid it any attention as it didn't belong to that issue.

> Allow CFIF to keep going despite unavailable ranges
> ---------------------------------------------------
>
>                 Key: CASSANDRA-3136
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3136
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Hadoop
>            Reporter: Mck SembWever
>            Priority: Minor
>
> From http://thread.gmane.org/gmane.comp.db.cassandra.user/18902
> <use-case-1 from="Patrik Modesto">
> We use Cassandra as a storage for web-pages, we store the HTML, all
> URLs that has the same HTML data and some computed data. We run Hadoop
> MR jobs to compute lexical and thematical data for each page and for
> exporting the data to a binary files for later use. URL gets to a
> Cassandra on user request (a pageview) so if we delete an URL, it gets
> back quickly if the page is active. Because of that and because there
> is lots of data, we have the keyspace set to RF=1. We can drop the
> whole keyspace and it will regenerate quickly and would contain only
> fresh data, so we don't care about lossing a node.
> </use-case-1>
> <use-case-2>
> trying to extract a small random sample (like a pig SAMPLE) of data out of cassandra.
> </use-case-2>
> <use-case-3>
> searching for something or some-pattern and one hit
> is enough. If you get the hit it's a positive result regardless if
> ranges were ignored, if you don't and you *know* there was a range
> ignored along the way you can re-run the job later. 
> For example such a job could be run at regular intervals in the day until a hit was found.
> </use-case-3>

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira