Date: Fri, 28 Jan 2011 10:26:55 +0000 From: Carsten Heesch <sysconfig@ossafe.org> To: freebsd-xen@FreeBSD.org Subject: Sync performance HAST and ggate/gmirror on Xen Message-ID: <11769353-E8AD-4CDA-B051-03B156EE6587@ossafe.org>
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Hi guys, Is anybody else using HAST or ggate/gmirror within Xen DomU's?=20 I'm experiencing dreadful performance (sync throughput less than = 1MB/sec) with both replication options, and am not quite sure how to = troubleshoot that, because the network speed between two DomU's is = otherwise well beyond 50MB/sec.=20 Logfiles and dmesg don't give any pointers, tcpdump looks clean (no = bouncing packets, wrong order etc), no collisions or packet loss either = (according to netstat). Anyone else experiencing similar problems? Test setup: 2x FreeBSD/amd64 8.2-RC2 (compiled about a week ago), XENHVM kernel = (with Janne's patch). Both DomU's are running on the same physical machine (CentOS 5.5 x86_64 = with Xen 4.3.3 on Intel i7), their NICs are using the same isolated = bridge on Dom0. Cheers Carsten Regards, Carsten Heesch carsten@heesch.me.uk mob: +44 7889 129998
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