Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@cassandra.apache.org
Received-SPF: pass (nike.apache.org: domain of edlinuxguru@gmail.com
 designates 209.85.161.44 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:in-reply-to:references:date:message-id:subject:from:to
         :content-type:content-transfer-encoding;
        b=fvLjHruXnhZtO/ZCpYTx4lLRDYHvrp3is3VCzpeUPspbvZ+BxPxzGfYEu+MGNBmkMa
         Z/6ixp6WQ8bpIUNBYuOnvKMB5BYQVeNVZg8tGHzRSXNXQpwP+CuWa8hqyXtqZoiTKA15
         48jweEzS1BFwOAsc1vpzLOvBvgg0N55tb2NE4=
MIME-Version: 1.0
In-Reply-To: <4D4D7C46.8070106@panasiangroup.com>
References: <4D4BC36F.3040604@panasiangroup.com>
	<4D4BCF52.7080407@panasiangroup.com>
	<AANLkTi=NQjCuHP1Fw=f-A56jk_6PCdV-nr1y7_19nzTv@mail.gmail.com>
	<2019873521-1296838861-cardhu_decombobulator_blackberry.rim.net-1683316563-@b1.c3.bise7.blackberry>
	<AANLkTinjL3K__qO+C8Am391+OZih5hA+SeLkf-LXHV6s@mail.gmail.com>
	<4D4C5954.6020002@panasiangroup.com>
	<4D4D1479.7080705@panasiangroup.com>
	<AANLkTikPN0vyATntMraSrjKP28XBGCBBoDJ5rqfk6hVt@mail.gmail.com>
	<4D4D7C46.8070106@panasiangroup.com>
Date: Sat, 5 Feb 2011 12:01:39 -0500
Message-ID: <AANLkTinG3U6C22F9gvECiM8ngSp21O1htQjRoFeQ=VSr@mail.gmail.com>
Subject: Re: How to delete bulk data from cassandra 0.6.3
From: Edward Capriolo <edlinuxguru@gmail.com>
To: user@cassandra.apache.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

On Sat, Feb 5, 2011 at 11:35 AM, Ali Ahsan <ali.ahsan@panasiangroup.com> wr=
ote:
> Thanks for replying Edward Capriolo.Will this effect cassandra ring
> =A0integrity? Another question is that will cassandra work properly after=
 this
> operation.And will it be possible to restore deleted =A0data from backup?=
.
>
>> in 0.6.X
>> pkill `pid of cassandra`
>> rm -rf * /var/lib/cassandra/data/<keyspace>/<CF you want to delete>*
>> (start cassandra)
>>
>>
>
>
> --
> S.Ali Ahsan
>
> Senior System Engineer
>
> e-Business (Pvt) Ltd
>
> 49-C Jail Road, Lahore, P.O. Box 676
> Lahore 54000, Pakistan
>
> Tel: +92 (0)42 3758 7140 Ext. 128
>
> Mobile: +92 (0)345 831 8769
>
> Fax: +92 (0)42 3758 0027
>
> Email: ali.ahsan@panasiangroup.com
>
>
>
> www.ebusiness-pg.com
>
> www.panasiangroup.com
>
> Confidentiality: This e-mail and any attachments may be confidential
> and/or privileged. If you are not a named recipient, please notify the
> sender immediately and do not disclose the contents to another person
> use it for any purpose or store or copy the information in any medium.
> Internet communications cannot be guaranteed to be timely, secure, error
> or virus-free. We do not accept liability for any errors or omissions.
>
>

I am not sure what you mean by data integrity.

In short, when Cassandra starts up it searches it's data directories
and loads up the data, index, bloom filters, and saved caches it
finds.

Unless the files are corrupt it will happily load up what it finds.

Restores are done by the process your described , stop server, restore
files, start server.