Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 44844 invoked from network); 2 Mar 2011 22:48:20 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 2 Mar 2011 22:48:20 -0000 Received: (qmail 29403 invoked by uid 500); 2 Mar 2011 22:48:18 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 29382 invoked by uid 500); 2 Mar 2011 22:48:18 -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 29374 invoked by uid 99); 2 Mar 2011 22:48:18 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 02 Mar 2011 22:48:18 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of s5alye@gmail.com designates 209.85.210.172 as permitted sender) Received: from [209.85.210.172] (HELO mail-iy0-f172.google.com) (209.85.210.172) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 02 Mar 2011 22:48:11 +0000 Received: by iyj8 with SMTP id 8so450828iyj.31 for ; Wed, 02 Mar 2011 14:47:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:date:message-id:subject:from:to :content-type; bh=Z2vtxAt2ok+WRSXBL4KKwfhqihGnY/Dvf7XKpRwWuxY=; b=qi55su6VbBD5/YPYbeFPfskbqwT5cCarHtxUGoIajhINoIjaFAXRxI/tL5aMEWkHiv XOFR6VRP200wi5+ZlYygYwCz5HfqvY/7b0rqQf/IJthEvqt/X7u4KwKF2xr0qQ5hjTWI dii3S03kLkJkV1wK6WtXr5405VUAriSlGtK+Q= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=JXEnIkav1YXziBgMn12b8uyZiI964t4Qpw1bE+DpPYjXTBg1XlmpIJb6obeh3oVEOX q8zaFjeepRY5zoYY0TD+fFd13tQLduZ6xON3FJO8wz/HyfFQtBHhty2amsu/2uR6P1yK STv9EGYDa6zI7YLwkFpQS5xGIsHOw6x7rh7E0= MIME-Version: 1.0 Received: by 10.231.207.66 with SMTP id fx2mr339390ibb.108.1299106070401; Wed, 02 Mar 2011 14:47:50 -0800 (PST) Received: by 10.231.12.1 with HTTP; Wed, 2 Mar 2011 14:47:50 -0800 (PST) Date: Wed, 2 Mar 2011 17:47:50 -0500 Message-ID: Subject: Defrag From: A J To: user@cassandra.apache.org Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Checked: Checked by ClamAV on apache.org Are there any details on how much of an issue fragmentation is (with Cassandra ) ? With all the merging and deletes that happen with during compactions, how does the disk fragmentation look like over time ? Any thumb-rules on how frequently and how to defrag ? Thanks.