Return-Path: X-Original-To: apmail-cassandra-commits-archive@www.apache.org Delivered-To: apmail-cassandra-commits-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 674B9CD43 for ; Tue, 18 Nov 2014 17:23:35 +0000 (UTC) Received: (qmail 15947 invoked by uid 500); 18 Nov 2014 17:23:34 -0000 Delivered-To: apmail-cassandra-commits-archive@cassandra.apache.org Received: (qmail 15900 invoked by uid 500); 18 Nov 2014 17:23:34 -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 15842 invoked by uid 99); 18 Nov 2014 17:23:34 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 18 Nov 2014 17:23:34 +0000 Date: Tue, 18 Nov 2014 17:23:34 +0000 (UTC) From: "Jonathan Ellis (JIRA)" To: commits@cassandra.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (CASSANDRA-8329) LeveledCompactionStrategy should split large files across data directories when compacting MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/CASSANDRA-8329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Jonathan Ellis updated CASSANDRA-8329: -------------------------------------- Reviewer: Yuki Morishita > LeveledCompactionStrategy should split large files across data directories when compacting > ------------------------------------------------------------------------------------------ > > Key: CASSANDRA-8329 > URL: https://issues.apache.org/jira/browse/CASSANDRA-8329 > Project: Cassandra > Issue Type: Improvement > Components: Core > Reporter: J.B. Langston > Assignee: Marcus Eriksson > Fix For: 2.0.12 > > Attachments: 0001-get-new-sstable-directory-for-every-new-file-during-.patch > > > Because we fall back to STCS for L0 when LCS gets behind, the sstables in L0 can get quite large during sustained periods of heavy writes. This can result in large imbalances between data volumes when using JBOD support. > Eventually these large files get broken up as L0 sstables are moved up into higher levels; however, because LCS only chooses a single volume on which to write all of the sstables created during a single compaction, the imbalance is persisted. -- This message was sent by Atlassian JIRA (v6.3.4#6332)