Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id 9F3D2200BA6 for ; Tue, 13 Sep 2016 04:15:22 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id 9DD06160AB8; Tue, 13 Sep 2016 02:15:22 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id E917E160AC8 for ; Tue, 13 Sep 2016 04:15:21 +0200 (CEST) Received: (qmail 84664 invoked by uid 500); 13 Sep 2016 02:15:21 -0000 Mailing-List: contact notifications-help@accumulo.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: jira@apache.org Delivered-To: mailing list notifications@accumulo.apache.org Received: (qmail 84633 invoked by uid 99); 13 Sep 2016 02:15:21 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 13 Sep 2016 02:15:21 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id D2B372C1B89 for ; Tue, 13 Sep 2016 02:15:20 +0000 (UTC) Date: Tue, 13 Sep 2016 02:15:20 +0000 (UTC) From: "Josh Elser (JIRA)" To: notifications@accumulo.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (ACCUMULO-4177) TinyLFU-based BlockCache MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Tue, 13 Sep 2016 02:15:22 -0000 [ https://issues.apache.org/jira/browse/ACCUMULO-4177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15485990#comment-15485990 ] Josh Elser commented on ACCUMULO-4177: -------------------------------------- FWIW, master is officially on minJdk=8. It would be neat to run a little benchmark to see what kind of a difference TinyLFU would make. Do you have any examples of tests that other projects used, [~ben.manes]? > TinyLFU-based BlockCache > ------------------------ > > Key: ACCUMULO-4177 > URL: https://issues.apache.org/jira/browse/ACCUMULO-4177 > Project: Accumulo > Issue Type: Improvement > Reporter: Ben Manes > Fix For: 2.0.0 > > Attachments: ACCUMULO-4177.patch > > > [LruBlockCache|https://github.com/apache/accumulo/blob/master/core/src/main/java/org/apache/accumulo/core/file/blockfile/cache/LruBlockCache.java] appears to be based on HBase's. I currently have a patch being reviewed in [HBASE-15560|https://issues.apache.org/jira/browse/HBASE-15560] that replaces the pseudo Segmented LRU with the TinyLFU eviction policy. That should allow the cache to make [better predictions|https://github.com/ben-manes/caffeine/wiki/Efficiency] based on frequency and recency, such as improved scan resistance. The implementation uses [Caffeine|https://github.com/ben-manes/caffeine], the successor to Guava's cache, to provide concurrency and keep the patch small. > Full details are in the JIRA ticket. I think it should be easy to port if there is interest. -- This message was sent by Atlassian JIRA (v6.3.4#6332)