Return-Path: 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 1A52691B3 for ; Mon, 2 Apr 2012 21:34:13 +0000 (UTC) Received: (qmail 9045 invoked by uid 500); 2 Apr 2012 21:34:10 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 9021 invoked by uid 500); 2 Apr 2012 21:34:10 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 9013 invoked by uid 99); 2 Apr 2012 21:34:10 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 02 Apr 2012 21:34:10 +0000 X-ASF-Spam-Status: No, hits=2.2 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: local policy) Received: from [208.113.200.5] (HELO homiemail-a52.g.dreamhost.com) (208.113.200.5) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 02 Apr 2012 21:34:02 +0000 Received: from homiemail-a52.g.dreamhost.com (localhost [127.0.0.1]) by homiemail-a52.g.dreamhost.com (Postfix) with ESMTP id 0F4D36B80F9 for ; Mon, 2 Apr 2012 14:33:41 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=thelastpickle.com; h=from :mime-version:content-type:subject:date:in-reply-to:to :references:message-id; q=dns; s=thelastpickle.com; b=0svyN10xqU rITvikkrMVZJkwPU8ADDTrjpVpho/yVeZk5EYu5C4b35wn1fvmgf9zHZ1/e+Eu3n Xywd3DxqIISrVhFeeWPUrFtMOS22J5uPgXwNmaJUmBWtG9fRfkEdbwZCHx67cjGo 0/OoyNExlHOLUf8bPbeXANKN9n0f+JSes= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=thelastpickle.com; h=from :mime-version:content-type:subject:date:in-reply-to:to :references:message-id; s=thelastpickle.com; bh=he/WpX1E796Im94a G1wJJ9TW9Wo=; b=ejGCouDh9OnhmL8JSJCIEGJfoO5adVKJkFbIaUT19Kb3m3je aLwJlaPnF65K5+Sfno2vQYDW5mKT4KmF1tHCB+XmdIQdxMkrRTlBwAwlvPJ0uohZ CJj05SKofJYgBJzfciVZb/22LhFk5aENz9XeBZ1sjOfZofz6tpd0yE4sf+8= Received: from [172.20.10.2] (99.180.226.49.dyn.cust.vf.net.nz [49.226.180.99]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: aaron@thelastpickle.com) by homiemail-a52.g.dreamhost.com (Postfix) with ESMTPSA id 61A8B6B80ED for ; Mon, 2 Apr 2012 14:33:40 -0700 (PDT) From: aaron morton Mime-Version: 1.0 (Apple Message framework v1257) Content-Type: multipart/alternative; boundary="Apple-Mail=_0955228A-52D4-494B-A6D3-CC7175D1EEF2" Subject: Re: Cassandra CF merkle tree Date: Tue, 3 Apr 2012 09:33:36 +1200 In-Reply-To: To: user@cassandra.apache.org References: Message-Id: X-Mailer: Apple Mail (2.1257) --Apple-Mail=_0955228A-52D4-494B-A6D3-CC7175D1EEF2 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 No it's internal only.=20 Take a look at o.a.c.service.AntiEntropyService Cheers ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 3/04/2012, at 12:21 AM, Thomas van Neerijnen wrote: > Hi all >=20 > Is there a way I can easily retrieve a Merkle tree for a CF, like the = one created during a repair? > I didn't see anything about this in the Thrift API docs, I'm assuming = this is a data structure made available only to internal Cassandra = functions. >=20 > I would like to explore using the Merkle trees as a method for data = integrity checks after config changes, version upgrades, and probably = loads of other scenarios I haven't even thought of that may result in = data loss going initially unnoticed. --Apple-Mail=_0955228A-52D4-494B-A6D3-CC7175D1EEF2 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=iso-8859-1 No = it's internal only. 

Take a look at = o.a.c.service.AntiEntropyService

Cheers

http://www.thelastpickle.com

On 3/04/2012, at 12:21 AM, Thomas van Neerijnen = wrote:

Hi all

Is there a way I can easily retrieve a = Merkle tree for a CF, like the one created during a repair?
I didn't = see anything about this in the Thrift API docs, I'm assuming this is a = data structure made available only to internal Cassandra functions.

I would like to explore using the Merkle trees as a method for data = integrity checks after config changes, version upgrades, and probably = loads of other scenarios I haven't even thought of that may result in = data loss going initially unnoticed.

= --Apple-Mail=_0955228A-52D4-494B-A6D3-CC7175D1EEF2--