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 CA667116A7 for ; Fri, 4 Jul 2014 21:38:34 +0000 (UTC) Received: (qmail 73075 invoked by uid 500); 4 Jul 2014 21:38:34 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 73023 invoked by uid 500); 4 Jul 2014 21:38:34 -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 73012 invoked by uid 99); 4 Jul 2014 21:38:34 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 04 Jul 2014 21:38:34 +0000 Date: Fri, 4 Jul 2014 21:38:34 +0000 (UTC) From: "stack (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HBASE-11331) [blockcache] lazy block decompression 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-11331?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] stack updated HBASE-11331: -------------------------- Attachment: HBASE-11331LazyBlockDecompressperfcompare.pdf Report comparing compressed to uncompressed bucket cache. Finding is slightly less i/o but at the cost of lots more GC and CPU. Get rate goes way down too. > [blockcache] lazy block decompression > ------------------------------------- > > Key: HBASE-11331 > URL: https://issues.apache.org/jira/browse/HBASE-11331 > Project: HBase > Issue Type: Improvement > Components: regionserver > Reporter: Nick Dimiduk > Assignee: Nick Dimiduk > Attachments: HBASE-11331.00.patch, HBASE-11331LazyBlockDecompressperfcompare.pdf > > > Maintaining data in its compressed form in the block cache will greatly increase our effective blockcache size and should show a meaning improvement in cache hit rates in well designed applications. The idea here is to lazily decompress/decrypt blocks when they're consumed, rather than as soon as they're pulled off of disk. > This is related to but less invasive than HBASE-8894. -- This message was sent by Atlassian JIRA (v6.2#6252)