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From Vladislav Nazarenko <>
Subject Re: Performance problem within SSVM
Date Tue, 26 May 2015 21:05:24 GMT
Hi Vadim,

thanx for your response ... this is the only thing I can think about ...

There is a dadicated storage network with a gateway configured .... the 
gateway is not in place (for now), but the both points (nfs server and 
nfs client) are in the same network and should access each other 
directly ...

The default gateway is another one (present and works well)

the IP Adress of the NFS Storage:
SSVM IP Address:        

ip r
default via B.B.28.1 dev eth2                                         
(default) dev eth3  proto kernel  scope link  src      
X.X.X.176/28 dev eth1  proto kernel  scope link  src X.X.X.187        
(management) dev eth0  proto kernel  scope link  src  
(local link)
A.A.40.14 via X.X.X.177 dev eth1                                      
(Route to the DNS Srever)
B.B.28.0/24 dev eth2  proto kernel  scope link  src B.B.28.67         
(Route to the physical host)

Wenn I look at the parameters of the java process (agent), there is also 
the following:


And this the, which GW ist not in place yet ....

So you think it might be the problem?

Kind regards

On 26.05.2015 20:55, Vadim Kimlaychuk wrote:
> Can it be network problem? What does your routing table say ?
> Vadim.
> ________________________________________
> From: Vladislav Nazarenko <>
> Sent: Tuesday, May 26, 2015 20:55
> To:
> Subject: Performance problem within SSVM
> Hi Everybody,
> I'm expierencing some performance problems with SSVM.
> /usr/local/cloud/systemvm/ shows no problems
> When the agent is running, I see 100% of io-wait.
> secondary storage is mounted, but due to the io-wait, I can not access it
> When I stop the agent(/etc/init.d/cloud stop), I can easily access the
> nfs mount. I also tried to download images manually (curl), works good.
> the physical host hos not IO problems
> /etc/exports:
> /storage,async,no_root_squash,no_subtree_check)
> Mount in the SSVM:
> on
> /mnt/SecStorage/0405ba30-38b9-349d-9ea4-15ea09d67e09 type nfs
> (rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,acdirmin=0,acdirmax=0,soft,proto=tcp,timeo=133,retrans=2147483647,sec=sys,mountaddr=,mountvers=3,mountport=892,mountproto=tcp,local_lock=none,addr=
> Cloudtack: 4.4.3 on centos 7
> Please advice what to check
> Vlad

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