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 48B4C200CB4 for ; Tue, 27 Jun 2017 22:49:04 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id 47676160BF6; Tue, 27 Jun 2017 20:49:04 +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 8C1BB160BD8 for ; Tue, 27 Jun 2017 22:49:03 +0200 (CEST) Received: (qmail 83065 invoked by uid 500); 27 Jun 2017 20:49:02 -0000 Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list common-issues@hadoop.apache.org Received: (qmail 83054 invoked by uid 99); 27 Jun 2017 20:49:02 -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; Tue, 27 Jun 2017 20:49:02 +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 2A9B1C1232 for ; Tue, 27 Jun 2017 20:49:02 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -99.202 X-Spam-Level: X-Spam-Status: No, score=-99.202 tagged_above=-999 required=6.31 tests=[KAM_ASCII_DIVIDERS=0.8, RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, USER_IN_WHITELIST=-100] 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 WL2Hdfm9hFvn for ; Tue, 27 Jun 2017 20:49:01 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTP id 253FB5F613 for ; Tue, 27 Jun 2017 20:49:01 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id 6D86EE01D9 for ; Tue, 27 Jun 2017 20:49:00 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 16FC52411C for ; Tue, 27 Jun 2017 20:49:00 +0000 (UTC) Date: Tue, 27 Jun 2017 20:49:00 +0000 (UTC) From: "Steve Loughran (JIRA)" To: common-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HADOOP-14600) LocatedFileStatus constructor forces RawLocalFS to exec a process to get the permissions MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Tue, 27 Jun 2017 20:49:04 -0000 [ https://issues.apache.org/jira/browse/HADOOP-14600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16065441#comment-16065441 ] Steve Loughran commented on HADOOP-14600: ----------------------------------------- {{NativeIO.POSIX.getFstat}} should handle all of this, cross platform. Testable > LocatedFileStatus constructor forces RawLocalFS to exec a process to get the permissions > ---------------------------------------------------------------------------------------- > > Key: HADOOP-14600 > URL: https://issues.apache.org/jira/browse/HADOOP-14600 > Project: Hadoop Common > Issue Type: Bug > Components: fs > Affects Versions: 2.7.3 > Environment: file:// in a dir with many files > Reporter: Steve Loughran > > Reported in SPARK-21137. a {{FileSystem.listStatus}} call really craws against the local FS, because {{FileStatus.getPemissions}} call forces {{DeprecatedRawLocalFileStatus}} tp spawn a process to read the real UGI values. > That is: for every other FS, what's a field lookup or even a no-op, on the local FS it's a process exec/spawn, with all the costs. This gets expensive if you have many files. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org For additional commands, e-mail: common-issues-help@hadoop.apache.org