[OmniOS-discuss] My NFS low performance test.

[Muhammad Yousuf Khan]

Just notice and would like to share my new finding.

as i mentioned earlier i am using RAIDz2 and hosted a VM on NFS. so for
testing i "SCP"  the whole HD image of VM to some other Linux system so
that i can learn if the issue is with Drive speed or the issue is with NFS
protocol, (of course not a bug with NFS but i have done something wrong in
configuring)

here is the SCP result. the  virtual harddisk image size is 32 GB.
i am running this command from OmniOS SSH.


vm-100001-disk-1.qco  50% |**************               | 16461 MB    09:42
ETA


you can see it copy 16 GB and i confirm that it took 3 to 4 minutes to copy
that huge data.

it seems fine to me. same RAIDz2 but  protocol change (SCP on SSH) so i
think the issue is with NFS. not with the Hardware speed/specs limitation.

any idea please.

Thanks,
Myk



On Thu, Sep 12, 2013 at 2:40 AM, Muhammad Yousuf Khan <sirtcp at gmail.com>wrote:

> first of  sorry for starting a new thread for same issue explained earlier
> because. i
> mistakenly deleted the email. so my apologizes.
>
> my omniOS server hardware is as under.
> dual 3.2GHz Processors, 12 GB RAM. dell 490 workstation
> 4 sata drives set with RAIDz2
> 1 40GB very old IDE drive for OmniOS root system
>
> i have 3 servers for testing.
> 1. KVM virtualization server (Proxmox)
> 2. OmniOS (NFS)
> 3. Desktop machine
>
> all three are connected via 1GB LAN broadcast domain.
>
> i have hosted a test VM (windows 2003 server) on NFS and when i am trying
> to copy the data (2gb File) from VM via Microsoft sharing to a desktop
> machine. i doing something very abnormal which i can not understand why
>
> just FYI : all the virtual machines hosted on KVM (proxmox server) local
> harddrives are on mdadm linux raid. and working great. and i see no issue
> in copy and pasting data from or to the local VM machines.
>
> In attached graphics you will see 2 test of sending 2GB file.
> in "snap a.1"  for few seconds file transfer stuck at 2 percent and then
> due to unknown reasons bumps to 15%. and it continues for few seconds and
> when file reaches the end it again goes down to 3 Percent  as you can see
> in "snap a.2"
>
> in "snap b.1" you can see it starts at 3% max and for 2 minutes it
> continues and speed only  changes btw 1% to 3%. see in "snap b.2"
>
> some says disable sync for testing and see if performance increases, sorry
> it didnt help me. same thing happens, whether i disable or enable the sync
> it makes no difference for me
>
> and Some says to upgrade the RAM which i am already looking but just a
> part of my confusion when i see vmstat it shows me i have 7GB free RAM
>
> is there anyone can please explain me why and what is happening behind all
> this, the workstation hosting OmniOS is a good machine. why it is doing
> some thing very unexpected.
>
> Any advice, suggestion, tip etc. will be highly appreciated.
>
> Thanks
> Myk
>
>
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