Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 1035F18BAA for ; Fri, 16 Oct 2015 21:26:06 +0000 (UTC) Received: (qmail 21843 invoked by uid 500); 16 Oct 2015 21:26:05 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 21787 invoked by uid 500); 16 Oct 2015 21:26:05 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 21771 invoked by uid 99); 16 Oct 2015 21:26:05 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 16 Oct 2015 21:26:05 +0000 Date: Fri, 16 Oct 2015 21:26:05 +0000 (UTC) From: "Vladimir Rodionov (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HBASE-14496) Compaction improvements: Delayed compaction in RatioBasedCompactionPolicy 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/HBASE-14496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vladimir Rodionov updated HBASE-14496: -------------------------------------- Attachment: HBASE-14496.v2.patch Fixed one issue with wrong number of files removed from compaction selection. > Compaction improvements: Delayed compaction in RatioBasedCompactionPolicy > ------------------------------------------------------------------------- > > Key: HBASE-14496 > URL: https://issues.apache.org/jira/browse/HBASE-14496 > Project: HBase > Issue Type: New Feature > Reporter: Vladimir Rodionov > Assignee: Vladimir Rodionov > Attachments: HBASE-14496.v1.patch, HBASE-14496.v2.patch > > > Delayed compaction feature for RatioBasedCompactionPolicy allows to specify maximum compaction delay for newly created store files. Files will be eligible for compaction only if their age exceeds this delay. This will allow to preserve new data in a block cache. For most applications, the newer the data is the more frequently it is accessed. The frequent compactions of a new store files result in high block cache churn rate and affects read performance and read latencies badly. > The configuration will be global, per table, per column family. -- This message was sent by Atlassian JIRA (v6.3.4#6332)