Return-Path: X-Original-To: apmail-cloudstack-issues-archive@www.apache.org Delivered-To: apmail-cloudstack-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 0FD8F1149B for ; Thu, 14 Aug 2014 09:24:13 +0000 (UTC) Received: (qmail 53844 invoked by uid 500); 14 Aug 2014 09:24:12 -0000 Delivered-To: apmail-cloudstack-issues-archive@cloudstack.apache.org Received: (qmail 53808 invoked by uid 500); 14 Aug 2014 09:24:12 -0000 Mailing-List: contact issues-help@cloudstack.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@cloudstack.apache.org Delivered-To: mailing list issues@cloudstack.apache.org Received: (qmail 53798 invoked by uid 500); 14 Aug 2014 09:24:12 -0000 Delivered-To: apmail-incubator-cloudstack-issues@incubator.apache.org Received: (qmail 53795 invoked by uid 99); 14 Aug 2014 09:24:12 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 14 Aug 2014 09:24:12 +0000 Date: Thu, 14 Aug 2014 09:24:12 +0000 (UTC) From: "Brenn Oosterbaan (JIRA)" To: cloudstack-issues@incubator.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Assigned] (CLOUDSTACK-7345) Copy snapshot command can cause NFS timeouts, breaking the snapshot process. 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/CLOUDSTACK-7345?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Brenn Oosterbaan reassigned CLOUDSTACK-7345: -------------------------------------------- Assignee: Brenn Oosterbaan > Copy snapshot command can cause NFS timeouts, breaking the snapshot process. > ---------------------------------------------------------------------------- > > Key: CLOUDSTACK-7345 > URL: https://issues.apache.org/jira/browse/CLOUDSTACK-7345 > Project: CloudStack > Issue Type: Bug > Security Level: Public(Anyone can view this level - this is the default.) > Components: Snapshot, XenServer > Affects Versions: 4.0.0, 4.0.1, 4.0.2, 4.1.0, 4.2.0 > Reporter: Brenn Oosterbaan > Assignee: Brenn Oosterbaan > Fix For: 4.4.0 > > > When multiple snapshots are being transferred from NFS primary to secondary storage at the same time, NFS timeouts on the primary storage can occur. > This then breaks most of the snapshot processes, resulting in corrupted (half completed) snapshots. > The DD command used uses 'bs=4M', which is then chopped into 64 64k reads since the primary storage is mounted with a blocksize of 64k, and written to the secondary storage as 32 128k blocks (since secondary is mounted with blocksize 128k). > We created a patch changing the DD command to use 'bs=128k' (unless iSCSI is used in which case it stays at bs=4M). > Snapshot processes no longer break, and no negative performance impact. -- This message was sent by Atlassian JIRA (v6.2#6252)