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 993EB200BEF for ; Wed, 4 Jan 2017 20:15:02 +0100 (CET) Received: by cust-asf.ponee.io (Postfix) id 9902D160B21; Wed, 4 Jan 2017 19:15:02 +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 E3822160B3A for ; Wed, 4 Jan 2017 20:15:01 +0100 (CET) Received: (qmail 50544 invoked by uid 500); 4 Jan 2017 19:15:01 -0000 Mailing-List: contact commits-help@beam.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@beam.apache.org Delivered-To: mailing list commits@beam.apache.org Received: (qmail 50534 invoked by uid 99); 4 Jan 2017 19:15:01 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd4-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 04 Jan 2017 19:15:01 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd4-us-west.apache.org (ASF Mail Server at spamd4-us-west.apache.org) with ESMTP id A4EF0C002D for ; Wed, 4 Jan 2017 19:15:00 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -6.219 X-Spam-Level: X-Spam-Status: No, score=-6.219 tagged_above=-999 required=6.31 tests=[KAM_ASCII_DIVIDERS=0.8, KAM_LAZY_DOMAIN_SECURITY=1, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RP_MATCHES_RCVD=-2.999] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd4-us-west.apache.org [10.40.0.11]) (amavisd-new, port 10024) with ESMTP id sXavZHy7YIc4 for ; Wed, 4 Jan 2017 19:14:59 +0000 (UTC) Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with SMTP id 278425F39C for ; Wed, 4 Jan 2017 19:14:59 +0000 (UTC) Received: (qmail 49871 invoked by uid 99); 4 Jan 2017 19:14:58 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 04 Jan 2017 19:14:58 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id 54D9E2C022B for ; Wed, 4 Jan 2017 19:14:58 +0000 (UTC) Date: Wed, 4 Jan 2017 19:14:58 +0000 (UTC) From: "Amit Sela (JIRA)" To: commits@beam.incubator.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (BEAM-649) Cache any PCollection implementation if accessed more than once MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Wed, 04 Jan 2017 19:15:02 -0000 [ https://issues.apache.org/jira/browse/BEAM-649?page=3Dcom.atlassian.= jira.plugin.system.issuetabpanels:all-tabpanel ] Amit Sela updated BEAM-649: --------------------------- Description:=20 Currently, the runner will cache any {{PCollection}} implementation - {{RDD= }} or {{DStream}} - if accessed for the second time. This can be further optimized to cache after the first evaluation, if acces= sed again, and also solve issues in BEAM-1206. was: Spark will execute a pipeline ONLY if it's triggered by an action (batch) /= output operation (streaming) - http://spark.apache.org/docs/1.6.2/streamin= g-programming-guide.html#output-operations-on-dstreams. Currently, such actions in Beam are mostly implemented via ParDo, and trans= lated by the runner as a Map transformation (via mapPartitions). The runner overcomes this by "forcing" actions on untranslated leaves. While this is OK, it would be better in some cases, e.g., Sinks, to apply t= he same ParDo translation but with foreach/foreachRDD instead of foreachPar= tition/mapPartitions. > Cache any PCollection implementation if accessed more than once > --------------------------------------------------------------- > > Key: BEAM-649 > URL: https://issues.apache.org/jira/browse/BEAM-649 > Project: Beam > Issue Type: Improvement > Components: runner-spark > Reporter: Amit Sela > Assignee: Jean-Baptiste Onofr=C3=A9 > > Currently, the runner will cache any {{PCollection}} implementation - {{R= DD}} or {{DStream}} - if accessed for the second time. > This can be further optimized to cache after the first evaluation, if acc= essed again, and also solve issues in BEAM-1206. -- This message was sent by Atlassian JIRA (v6.3.4#6332)