VMWare ESX and FBSD 7.2 AMD64 guest
steve at ibctech.ca
Fri Jul 24 14:47:50 UTC 2009
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.
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 3233 bytes
Desc: S/MIME Cryptographic Signature
Url : http://lists.freebsd.org/pipermail/freebsd-questions/attachments/20090724/681652ff/smime.bin
More information about the freebsd-questions