Recently (A year agoish?) VND got added, which for me fixed a lot of
networking qwirks and improved performance for my OpenBSD KVM. Hitting
200-400mbit easily now where before I barely get more than 80mbit. Most
of the bottle neck is my physical network as my physical box using the
same nics don't get much better speeds.
So there have probably been some improvements there also.
On 2016-03-31 07:58, Geoff Nordli wrote:
On 16-03-30 06:15 PM, Dave Finster wrote:
It is worth mentioning that due to the design decisions around disk
I/O in KVMs, for good performance (which itself is subjective) to be
realised, you *really really* need a good SSD based SLOG in the zpool.
My personal favourite is the HGST SSD800MH.B
The reasoning here is that every write operation inside a KVM is
synchronous to the zpool. A zpool that is not optimised to cater for
synchronous writes will not yield very good results.
- Dave
On 31 Mar 2016, at 11:09 AM, Ian Collins <[email protected]> wrote:
On 03/31/16 13:32, Humberto Ramirez wrote:
Is anybody familiar with any recent perfomance comparison of KVM vs
VMWare ESX? Or perhaps someone who had been running ESX and migrated
to SmartOS on the same hardware?
I found an old a paper from 2012 on which ESX outperformed KVM by
30% and sometimes for as much as 45%, of course 4 years is an
eternity and that KVM system was not running SmartOS nor ZFS.
I haven't compared like for like for a while, but of all the systems
I've moved from VmWare to SmartOS KVM, there has been a performance
gain, especially I/O.
The KVM overhead for Ubuntu tested by building gcc compared to bare
metal is about 8-9%. For windows I've seen SmartOS KVM return better
than bare metal numbers (ZFS?) running MS-SQL benchmarks.
On like for like hardware, I can't see how VmWare+NAS can best
KVM+ZFS.
You should try a comparison with your expected workload.
--
Ian.
This is a great discussion.
I am wondering, what about network performance?
thanks,
Geoff
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