Return-Path: 
 <user-return-39043-apmail-cassandra-user-archive=cassandra.apache.org@cassandra.apache.org>
X-Original-To: apmail-cassandra-user-archive@www.apache.org
Delivered-To: apmail-cassandra-user-archive@www.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id E0AAC1009D
	for <apmail-cassandra-user-archive@www.apache.org>;
 Mon, 17 Feb 2014 18:40:55 +0000 (UTC)
Received: (qmail 4774 invoked by uid 500); 17 Feb 2014 18:40:52 -0000
Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org
Received: (qmail 4680 invoked by uid 500); 17 Feb 2014 18:40:52 -0000
Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:user-help@cassandra.apache.org>
List-Unsubscribe: <mailto:user-unsubscribe@cassandra.apache.org>
List-Post: <mailto:user@cassandra.apache.org>
List-Id: <user.cassandra.apache.org>
Reply-To: user@cassandra.apache.org
Delivered-To: mailing list user@cassandra.apache.org
Received: (qmail 4672 invoked by uid 99); 17 Feb 2014 18:40:51 -0000
Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 17 Feb 2014 18:40:51 +0000
X-ASF-Spam-Status: No, hits=1.5 required=5.0
	tests=HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS
X-Spam-Check-By: apache.org
Received-SPF: pass (athena.apache.org: domain of davychia@gmail.com designates
 209.85.220.182 as permitted sender)
Received: from [209.85.220.182] (HELO mail-vc0-f182.google.com)
 (209.85.220.182)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 17 Feb 2014 18:40:46 +0000
Received: by mail-vc0-f182.google.com with SMTP id id10so12350454vcb.27
        for <user@cassandra.apache.org>; Mon, 17 Feb 2014 10:40:25 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
        h=mime-version:from:date:message-id:subject:to:content-type;
        bh=xu/ju9gFoV36BCsg9BuUOk9o6WSXaChUZjTiKLKDOmg=;
        b=QYz9AM3GOwBIX3bPdoLxtr0d2LDEJIrjTqEYxP98VZokr/wVQ06LFEgbh2ryEgNTz4
         CujaDcQ9TxtDaZgmaooF0SbY+LMAdoMJygOGQLkzwYskgKWF9+jJPVI5Vxo5c1ck9f3p
         I8Kyty8oD2f03gEAGrODsc+1jd0EJZiQU0Pm/8ttnXyxe2+rd5Xesun9TL/TR9eIplyo
         iAcECZ2br8skm4/J+qX9oD3NdfQCTVF8gREg+QJ91xrFVTamy88hYcJmCQqM9DDrwn27
         sHEOO/w82xDO9lGJ9xpzKsP5pmZApvoNwcvMRVEbI4lz97dXQPW/a1IAlu6i4l6sjeVF
         K8ZQ==
X-Received: by 10.220.67.18 with SMTP id p18mr18103995vci.14.1392662425579;
 Mon, 17 Feb 2014 10:40:25 -0800 (PST)
MIME-Version: 1.0
Received: by 10.58.37.39 with HTTP; Mon, 17 Feb 2014 10:39:45 -0800 (PST)
From: David Chia <davychia@gmail.com>
Date: Mon, 17 Feb 2014 10:39:45 -0800
Message-ID: 
 <CAAQhfnjX8FgiktzTh25Gknqq+2jdLNVYJeAqjp+LMKoZCQpsNw@mail.gmail.com>
Subject: cold_reads_to_omit and tombstones
To: user@cassandra.apache.org
Content-Type: multipart/alternative; boundary=047d7b343f9a2b372504f29e7d0c
X-Virus-Checked: Checked by ClamAV on apache.org

--047d7b343f9a2b372504f29e7d0c
Content-Type: text/plain; charset=ISO-8859-1

Hi,

It's not clear to me in the doc about cold_reads_to_omit. when
cold_reads_to_omit ignores low read rate sstables during compactions, what
would gc tombstones in those cold sstables? Do we rely on tombstone
compactions, which, I might misconfigured, I've never seen tombstone
compactions got kicked off?

Cassandra version: 2.0.5


David

--047d7b343f9a2b372504f29e7d0c
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi,<div><br></div><div>It&#39;s not clear to me in the doc=
 about=A0cold_reads_to_omit. when cold_reads_to_omit ignores low read rate =
sstables during compactions, what would gc tombstones in those cold sstable=
s? Do we rely on tombstone compactions, which, I might misconfigured, I&#39=
;ve never seen tombstone compactions got kicked off?</div>

<div><br></div><div>Cassandra version: 2.0.5</div><div><br></div><div><br><=
/div><div>David</div><div><br></div></div>

--047d7b343f9a2b372504f29e7d0c--