Return-Path: Delivered-To: apmail-cassandra-commits-archive@www.apache.org Received: (qmail 43282 invoked from network); 19 Apr 2010 15:01:54 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 19 Apr 2010 15:01:54 -0000 Received: (qmail 97352 invoked by uid 500); 19 Apr 2010 15:01:54 -0000 Delivered-To: apmail-cassandra-commits-archive@cassandra.apache.org Received: (qmail 97339 invoked by uid 500); 19 Apr 2010 15:01:54 -0000 Mailing-List: contact commits-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@cassandra.apache.org Delivered-To: mailing list commits@cassandra.apache.org Received: (qmail 97331 invoked by uid 500); 19 Apr 2010 15:01:54 -0000 Delivered-To: apmail-incubator-cassandra-commits@incubator.apache.org Received: (qmail 97328 invoked by uid 99); 19 Apr 2010 15:01:54 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 19 Apr 2010 15:01:54 +0000 X-ASF-Spam-Status: No, hits=-1374.6 required=10.0 tests=ALL_TRUSTED,AWL X-Spam-Check-By: apache.org Received: from [140.211.11.130] (HELO eos.apache.org) (140.211.11.130) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 19 Apr 2010 15:01:53 +0000 Received: from eos.apache.org (localhost [127.0.0.1]) by eos.apache.org (Postfix) with ESMTP id 35A1D1761F for ; Mon, 19 Apr 2010 15:01:31 +0000 (GMT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Apache Wiki To: Apache Wiki Date: Mon, 19 Apr 2010 15:01:30 -0000 Message-ID: <20100419150130.1842.31072@eos.apache.org> Subject: =?utf-8?q?=5BCassandra_Wiki=5D_Trivial_Update_of_=22LiveSchemaUpdates=22_?= =?utf-8?q?by_JonathanEllis?= Dear Wiki user, You have subscribed to a wiki page or wiki category on "Cassandra Wiki" for= change notification. The "LiveSchemaUpdates" page has been changed by JonathanEllis. http://wiki.apache.org/cassandra/LiveSchemaUpdates?action=3Ddiff&rev1=3D6&r= ev2=3D7 -------------------------------------------------- =3D Modifying Schema on a Live Cluster =3D + = + This page discusses features available in 0.7 (only available as svn trun= k, as of this writing). = =3D=3D Under the Hood =3D=3D A new system table called `definitions` keeps track of two things: keyspa= ce definitions (`SCHEMA_CF`) and keyspace changes (`MIGRATIONS_CF`). TimeU= UIDs are used throughout to match migrations up with schema and vice-versa.