Return-Path: Delivered-To: apmail-incubator-cassandra-user-archive@minotaur.apache.org Received: (qmail 82740 invoked from network); 16 Dec 2009 21:17:31 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 16 Dec 2009 21:17:31 -0000 Received: (qmail 19403 invoked by uid 500); 16 Dec 2009 21:17:31 -0000 Delivered-To: apmail-incubator-cassandra-user-archive@incubator.apache.org Received: (qmail 19379 invoked by uid 500); 16 Dec 2009 21:17:31 -0000 Mailing-List: contact cassandra-user-help@incubator.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: cassandra-user@incubator.apache.org Delivered-To: mailing list cassandra-user@incubator.apache.org Received: (qmail 19370 invoked by uid 99); 16 Dec 2009 21:17:31 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 16 Dec 2009 21:17:31 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of jbellis@gmail.com designates 209.85.219.220 as permitted sender) Received: from [209.85.219.220] (HELO mail-ew0-f220.google.com) (209.85.219.220) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 16 Dec 2009 21:17:23 +0000 Received: by ewy20 with SMTP id 20so1559255ewy.20 for ; Wed, 16 Dec 2009 13:17:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :from:date:message-id:subject:to:content-type; bh=mlSGn+/QVCiwKpaxFXHfZU9+2B2NTyDxFFqVhzJl17s=; b=TmJcAueV64u4xHZ74NN2smb6Td7bTnbNRjE0uRr8JB1I3v8Bt5Ml8MDw/yQjDDen39 WXiBh+c7OSSSXoTf2DNcRP77/KyQ4BuBD9Rm0abAkJKwixUaFRiBUu1FSzncBgWb6fgz qoCcuBkjt+TWXxXXN0eTYhiBfmpwW+hlWhgEE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; b=oiSK9rPUvrGalkDjuGM5jRjaAP8dTghL8WCQgolM08v2AKbHDkVNSpsZ80nXL0lWpK 9L0qkQgrMZ7X36Xg0HvIioJOZQST19bllmtFWab10ghBXuCYN3G2lDo7KYfbXqijyMn3 9lX5Rc4kMBfQFieFOhgOOCYNAKK7OWkqYg3uM= MIME-Version: 1.0 Received: by 10.216.86.206 with SMTP id w56mr625733wee.1.1260998223131; Wed, 16 Dec 2009 13:17:03 -0800 (PST) In-Reply-To: <828083e70912161231i23f126cer64292d59bafb0093@mail.gmail.com> References: <766B5A29D28DA442AB229AAEE2AFC44507D7B914EB@SEAMBX.corp.real.com> <828083e70912161231i23f126cer64292d59bafb0093@mail.gmail.com> From: Jonathan Ellis Date: Wed, 16 Dec 2009 15:16:43 -0600 Message-ID: Subject: Re: create only - no update To: cassandra-user@incubator.apache.org Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Checked: Checked by ClamAV on apache.org On Wed, Dec 16, 2009 at 2:31 PM, gabriele renzi wrote: > is there a fundamental reason for not being able to provide a > putIfAbsent-like abstraction in cassandra? Yes: there is no global master to serialize operations from multiple clients.