Why VMware Virtual disk so slow (da0: 3.300MB/s transfers) ?

[Bryan Vyhmeister]

On Aug 20, 2013, at 14:05, Justin Sherrill <justin at shiningsilence.com> wrote:

> On Mon, Aug 19, 2013 at 10:15 PM, Dongsheng Song
> <dongsheng.song at gmail.com> wrote:
> 
>> 4156467 bytes/sec = 3.964 MB/s
> 
> I don't have a good answer for you other than that it's not endemic to
> DragonFly - this is what I got under VMWare Workstation:
> 
> 1073741824 bytes transferred in 24.643408 secs (43571158 bytes/sec)
> 
> - Which is about 10 times your rate.  I get the same 3.300MB/sec
> transfers notice in my dmesg, so it may be something with the
> underlying disk.

Perhaps this has already been addressed but normal hard disks under VMware ESXi are dreadfully slow unless you have a battery-backed RAID controller. I've done local testing with SSDs instead which pretty much alleviates the speed issues but gives no redundancy.

Bryan