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 57CB62009C5 for ; Mon, 16 May 2016 13:42:14 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id 568C3160A1F; Mon, 16 May 2016 11:42:14 +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 CEE40160A16 for ; Mon, 16 May 2016 13:42:13 +0200 (CEST) Received: (qmail 4737 invoked by uid 500); 16 May 2016 11:42:13 -0000 Mailing-List: contact issues-help@flink.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@flink.apache.org Delivered-To: mailing list issues@flink.apache.org Received: (qmail 4714 invoked by uid 99); 16 May 2016 11:42:13 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 16 May 2016 11:42:13 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id DB95B2C1F62 for ; Mon, 16 May 2016 11:42:12 +0000 (UTC) Date: Mon, 16 May 2016 11:42:12 +0000 (UTC) From: "Gabor Gevay (JIRA)" To: issues@flink.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (FLINK-2147) Approximate calculation of frequencies in data streams MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Mon, 16 May 2016 11:42:14 -0000 [ https://issues.apache.org/jira/browse/FLINK-2147?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Gabor Gevay updated FLINK-2147: ------------------------------- Issue Type: New Feature (was: Sub-task) Parent: (was: FLINK-2142) > Approximate calculation of frequencies in data streams > ------------------------------------------------------ > > Key: FLINK-2147 > URL: https://issues.apache.org/jira/browse/FLINK-2147 > Project: Flink > Issue Type: New Feature > Components: Streaming > Reporter: Gabor Gevay > Priority: Minor > Labels: statistics > > Count-Min sketch is a hashing-based algorithm for approximately keeping track of the frequencies of elements in a data stream. It is described by Cormode et al. in the following paper: > http://dimacs.rutgers.edu/~graham/pubs/papers/cmsoft.pdf > Note that this algorithm can be conveniently implemented in a distributed way, as described in section 3.2 of the paper. > The paper > http://www.vldb.org/conf/2002/S10P03.pdf > also describes algorithms for approximately keeping track of frequencies, but here the user can specify a threshold below which she is not interested in the frequency of an element. The error-bounds are also different than the Count-min sketch algorithm. -- This message was sent by Atlassian JIRA (v6.3.4#6332)