Date: Fri, 24 Jul 2009 10:45:17 -0400 From: Steve Bertrand <steve@ibctech.ca> To: John Nielsen <lists@jnielsen.net> Cc: freebsd-questions@freebsd.org Subject: Re: VMWare ESX and FBSD 7.2 AMD64 guest Message-ID: <4A69C8FD.7060603@ibctech.ca> In-Reply-To: <200907241022.15985.lists@jnielsen.net> References: <4A68F5CF.8030303@ibctech.ca> <200907241022.15985.lists@jnielsen.net>
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This is a cryptographically signed message in MIME format. --------------ms050206020006040806000003 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit John Nielsen wrote: > On Thursday 23 July 2009 19:44:15 Steve Bertrand wrote: >> My problem is performance. I'm only willing to make this box virtual if >> I can keep the abstraction performance loss to <25% (my ultimate goal >> would be 15%). >> usable memory = 8575160320 (8177 MB) >> avail memory = 8273620992 (7890 MB) >> >> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs >> cpu0 (BSP): APIC ID: 0 >> cpu1 (AP): APIC ID: 1 >> cpu2 (AP): APIC ID: 6 >> cpu3 (AP): APIC ID: 7: > > Did you give the VM 4 virtual processors as well? How much RAM did it have? > What type of storage does the server have? Did the VM just get a .vmdk on > VMFS? What version of ESX? I gave it all four procs to use, and all available memory. See below about storage system. > The system time is what's running away. My guess is that > that is largely due to disk I/O and virtualization of same. What you can do > to address this depends on what hardware you have. Giving the VM a raw > slice/LUN/disk instead of a .vmdk file may improve matters somewhat. If you > do use a disk file be sure that it lives on a stripe (or whatever unit is > relevant) boundary of the underlying storage. Ways to do that (if any) depend > on the storage. Improving the RAID performance, etc. of the storage will > improve your benchmark overall, and may or may not narrow the divide. The storage system is the following, with 512MB cache. I'm trying to figure out if the cache has a battery backup installed, as I've read that disk performance could be affected without it. kernel: ciss0: <HP Smart Array P400i> With six Fujitsu MHW2120BS 120GB 5.4k SATA laptop drives. After performing multiple in-OS and outside-of-OS benchmark tests, the maximum read speed I can achieve is ~7MBps. Before I reconfigured the machine from the default RAID6 to RAID1+0, I was capped at ~5. This is certainly a huge bottleneck. I'm not impressed in any way with that type of performance, when a lesser system that I have running FBSD 7.2 and ZFS can achieve ~160MBps. I know the drives are only 5.4k, but ~7MB just isn't right. I'm off to see what we can do about that. 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