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 69DE9DB2D for ; Tue, 14 Aug 2012 20:17:12 +0000 (UTC) Received: (qmail 5633 invoked by uid 500); 14 Aug 2012 20:17:09 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 5584 invoked by uid 500); 14 Aug 2012 20:17:09 -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 5576 invoked by uid 99); 14 Aug 2012 20:17:09 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 14 Aug 2012 20:17:09 +0000 X-ASF-Spam-Status: No, hits=2.4 required=5.0 tests=FREEMAIL_ENVFROM_END_DIGIT,FSL_RCVD_USER,HK_RANDOM_ENVFROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of teddyyyy123@gmail.com designates 209.85.216.51 as permitted sender) Received: from [209.85.216.51] (HELO mail-qa0-f51.google.com) (209.85.216.51) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 14 Aug 2012 20:17:04 +0000 Received: by qadz3 with SMTP id z3so742690qad.10 for ; Tue, 14 Aug 2012 13:16:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:from:date:message-id:subject:to:content-type; bh=/xAt3T5765mhuuerKU55vENwP5TbIc6I1xA2zcE5V9M=; b=xJZJ2LIMdksQYDUdLy6JExLIuJb3OwE3OIIP4fKXE1AXuhIPljfFS7PhVYH2mFmIpc dLO+RfFdxJZp0iFUicrml/yD5mFZF1pA0LG1hPvTFDlG+G8PBcyiU+qCHQCgIUhgWHQM CTDEVi73FYtevRYRUM5qDNfdavch8bDihIs/qbnjk9GcW6puEgjxuSES0QBt03VZlTJr hR8RRs7T1v5J4Mf1YXRM7p/FoIJpcX+C5n9K2VlDmJuMThJwos1Rh3t1Q4dthKuA2R4p s7J9Q9/sWXFUzjByzuuhEQ8XW43DR0z8MmxRMalhhn9QnwnHWbJlP8IED13aGEvars8g Vb7A== Received: by 10.229.135.202 with SMTP id o10mr9765016qct.19.1344975403982; Tue, 14 Aug 2012 13:16:43 -0700 (PDT) MIME-Version: 1.0 Received: by 10.49.41.72 with HTTP; Tue, 14 Aug 2012 13:16:23 -0700 (PDT) From: Yang Date: Tue, 14 Aug 2012 13:16:23 -0700 Message-ID: Subject: incremental backup and Priam? To: user@cassandra.apache.org Content-Type: multipart/alternative; boundary=00248c6a66ba2fa12004c73f7d13 X-Virus-Checked: Checked by ClamAV on apache.org --00248c6a66ba2fa12004c73f7d13 Content-Type: text/plain; charset=ISO-8859-1 in the initial incremental backup implementation, the hardlinking to the backup dir was in the CFS.addSSTable() code, so it's part of the Cassandra code. I looked at Priam, https://github.com/Netflix/Priam/blob/master/priam/src/main/java/com/netflix/priam/backup/IncrementalBackup.java this code pretty much does the same thing as the original addSSTable() incremental backup . so the Priam backup code operates outside of Cassandra write path? any insight into why this approach was chosen instead of using the incremental backup provided by Cassandra? thanks Yang --00248c6a66ba2fa12004c73f7d13 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable in the initial incremental backup implementation,=A0
the hardlinking to= the backup dir was in the CFS.addSSTable() =A0code, so it's part of th= e Cassandra code.


this code pretty much does the same thing as the origin= al addSSTable() incremental backup .
so the Priam backup code ope= rates outside of Cassandra write path?
any insight into why this = approach was chosen instead of using the incremental backup provided by Cas= sandra?

thanks
Yang
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