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 A80F67716 for ; Wed, 3 Aug 2011 12:17:53 +0000 (UTC) Received: (qmail 51938 invoked by uid 500); 3 Aug 2011 12:17:51 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 51654 invoked by uid 500); 3 Aug 2011 12:17:44 -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 51638 invoked by uid 99); 3 Aug 2011 12:17:43 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 03 Aug 2011 12:17:43 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=5.0 tests=RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: local policy) Received: from [208.113.200.5] (HELO homiemail-a80.g.dreamhost.com) (208.113.200.5) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 03 Aug 2011 12:17:37 +0000 Received: from homiemail-a80.g.dreamhost.com (localhost [127.0.0.1]) by homiemail-a80.g.dreamhost.com (Postfix) with ESMTP id A87DA37A065 for ; Wed, 3 Aug 2011 05:16:20 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=thelastpickle.com; h=content-type :mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; q=dns; s= thelastpickle.com; b=Ur7U/NEyL/DY+9nPIkh8VC3bm73V9hkytGc1o3ncoJs NVF7siCxg/96YySX5x/W15B6a1kiNVLlED50BmWNZ5rKJdmh7ZOVh3KJ9HriGxLR +LRYURP1o42fWc9wkEt89KSF269X/mjlPRiBNMN7V2yPy5R4NuyjfqFcqQUQzbI4 = DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=thelastpickle.com; h= content-type:mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; s= thelastpickle.com; bh=HCHF3S1V37PCMlM6+/pUYF7ZN5w=; b=cK47zBA22X KeKgJhGbVTThA/T5CKZ5s41n0/2WghB9Pa84ZTtrIKLJhB3pKEgt/OdQreXLKscz nsK7xltYB1DpHWq5qe3TsHA6p+cVMrOaRCm3rEpaczBOmaL5xr3UTEYGhS11HlBw proRtBtuqn9w/DD32zhzSpVnV1m7KOV6k= Received: from [192.168.0.101] (CPE-124-191-124-91.pmql1.win.bigpond.net.au [124.191.124.91]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: aaron@thelastpickle.com) by homiemail-a80.g.dreamhost.com (Postfix) with ESMTPSA id 4B0DF37A05B for ; Wed, 3 Aug 2011 05:16:20 -0700 (PDT) Content-Type: text/plain; charset=iso-8859-1 Mime-Version: 1.0 (Apple Message framework v1244.3) Subject: Re: Do we have any restrictions on the number of column families in a keyspace? From: aaron morton In-Reply-To: Date: Wed, 3 Aug 2011 22:17:12 +1000 Content-Transfer-Encoding: quoted-printable Message-Id: <92DBFD43-7BED-4FDF-8592-65D9BC17D451@thelastpickle.com> References: <3DC7AAB1DB7749BFAC3ED289FF126A35@gmail.com> To: user@cassandra.apache.org X-Mailer: Apple Mail (2.1244.3) There were never any restrictions other than common sense.=20 The more you make, even under 0.8, the more frequently you have to flush = to disk. 0.8 automates the memory management, which used to involve = random guesses, and basically makes it's usable.=20 So I'm just saying there is a down side. If you create CF's like you = would create tables in a RDBMS you will probably have some unhappy days = ahead.=20 cheers ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 3 Aug 2011, at 18:14, samal wrote: > yes for 0.7=20 > no for 0.8