Re: [ovirt-users] Some tests results: lustrefs over nfs on VM

[Arman Khalatyan]

Ok, thanks, looks like a BUG, I will open one...


On Tue, Nov 21, 2017 at 12:40 PM, Yaniv Kaul  wrote:
>
>
> On Mon, Nov 20, 2017 at 4:24 PM, Arman Khalatyan  wrote:
>>
>> On Mon, Nov 20, 2017 at 12:23 PM, Yaniv Kaul  wrote:
>> >
>> >
>> > Define QoS on the NIC.
>> > But I think you wish to limit IO, no?
>> > Y.
>> >
>> For the moment QoS is unlimited.
>> Actually for some tasks I wish to allocate 80% of 10Gbit interface,
>> but the VM interface is always 1Gbit.
>
>
> The VM interface is virtual. It's not limited or set to 1G. Due to some
> ancient Windows certification requirements (that required that an interface
> would have a defined speed!), 1G was set for it.
>
>>
>> Inside the QoS of the host interface I cannot put 8000 for the Rate
>> Limit, it claims that rate limit should be between number 1...1024,
>> looks like it assumes only 1Gbit interfaces?
>
>
> I kinda remember we had this issue in the past - and it was fixed - please
> file a bug so we'll look at it.
> Y.
>
>>
>> a.
>
>
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Re: [ovirt-users] Some tests results: lustrefs over nfs on VM

[Yaniv Kaul]

On Mon, Nov 20, 2017 at 4:24 PM, Arman Khalatyan  wrote:

> On Mon, Nov 20, 2017 at 12:23 PM, Yaniv Kaul  wrote:
> >
> >
> > Define QoS on the NIC.
> > But I think you wish to limit IO, no?
> > Y.
> >
> For the moment QoS is unlimited.
> Actually for some tasks I wish to allocate 80% of 10Gbit interface,
> but the VM interface is always 1Gbit.
>

The VM interface is virtual. It's not limited or set to 1G. Due to some
ancient Windows certification requirements (that required that an interface
would have a defined speed!), 1G was set for it.


> Inside the QoS of the host interface I cannot put 8000 for the Rate
> Limit, it claims that rate limit should be between number 1...1024,
> looks like it assumes only 1Gbit interfaces?
>

I kinda remember we had this issue in the past - and it was fixed - please
file a bug so we'll look at it.
Y.


> a.
>
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Re: [ovirt-users] Some tests results: lustrefs over nfs on VM

[Arman Khalatyan]

On Mon, Nov 20, 2017 at 12:23 PM, Yaniv Kaul  wrote:
>
>
> Define QoS on the NIC.
> But I think you wish to limit IO, no?
> Y.
>
For the moment QoS is unlimited.
Actually for some tasks I wish to allocate 80% of 10Gbit interface,
but the VM interface is always 1Gbit.
Inside the QoS of the host interface I cannot put 8000 for the Rate
Limit, it claims that rate limit should be between number 1...1024,
looks like it assumes only 1Gbit interfaces?
a.
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Re: [ovirt-users] Some tests results: lustrefs over nfs on VM

[Yaniv Kaul]

On Nov 19, 2017 11:05 PM, "Arman Khalatyan"  wrote:

hi Yaniv,
yes for sure I hit some cache in between but not the vm cache, it has a 4GB
ram, with oflag=direct I get about 120MB/s

for the data analysis the cache is our friend:)

The backend is a lustrefs 2.10.x.
yes we have dedicated 10G on the hosts, where we can limit the vm interface
to 10Gbit?


Define QoS on the NIC.
But I think you wish to limit IO, no?
Y.


Am 19.11.2017 8:33 nachm. schrieb "Yaniv Kaul" :



On Sun, Nov 19, 2017 at 7:08 PM, Arman Khalatyan  wrote:

> Hi, in our environment we got pretty good io performance on VM, with
> following configuration:
> lustrebox: /lust mounted on "GATEWAY" over IB
> GATEWAY: export /lust as nfs4 on 10G interface
> VM(test.vm): import as NFS over 10G interface
>
> [r...@test.vm  ~]# dd  if=/dev/zero bs=128K count=10
>

Without oflag=direct, you are hitting (somewhat) the cache.


>
> of=/test/tmp/test.tmp
> 10+0 records in
> 10+0 records out
> 1310720 <(310)%20720-> bytes (13 GB) copied, 20.8402 s, 629 MB/s
> looks promising for the future deployments.
>

Very - what's the backend storage?


>
> only one problem remains that on heavy io I get some wornings that the vm
> network is saturated, are there way to configure the bandwidth limits to
> 10G for the VM Interface??
>

Yes, but you really need a dedicated storage interface, no?
Y.


>
>
> thank you beforehand,
> Arman.
>
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Re: [ovirt-users] Some tests results: lustrefs over nfs on VM

[Arman Khalatyan]

hi Yaniv,
yes for sure I hit some cache in between but not the vm cache, it has a 4GB
ram, with oflag=direct I get about 120MB/s

for the data analysis the cache is our friend:)

The backend is a lustrefs 2.10.x.
yes we have dedicated 10G on the hosts, where we can limit the vm interface
to 10Gbit?

Am 19.11.2017 8:33 nachm. schrieb "Yaniv Kaul" :



On Sun, Nov 19, 2017 at 7:08 PM, Arman Khalatyan  wrote:

> Hi, in our environment we got pretty good io performance on VM, with
> following configuration:
> lustrebox: /lust mounted on "GATEWAY" over IB
> GATEWAY: export /lust as nfs4 on 10G interface
> VM(test.vm): import as NFS over 10G interface
>
> [r...@test.vm  ~]# dd  if=/dev/zero bs=128K count=10
>

Without oflag=direct, you are hitting (somewhat) the cache.


>
> of=/test/tmp/test.tmp
> 10+0 records in
> 10+0 records out
> 1310720 <(310)%20720-> bytes (13 GB) copied, 20.8402 s, 629 MB/s
> looks promising for the future deployments.
>

Very - what's the backend storage?


>
> only one problem remains that on heavy io I get some wornings that the vm
> network is saturated, are there way to configure the bandwidth limits to
> 10G for the VM Interface??
>

Yes, but you really need a dedicated storage interface, no?
Y.


>
>
> thank you beforehand,
> Arman.
>
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> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
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Re: [ovirt-users] Some tests results: lustrefs over nfs on VM

[Yaniv Kaul]

On Sun, Nov 19, 2017 at 7:08 PM, Arman Khalatyan  wrote:

> Hi, in our environment we got pretty good io performance on VM, with
> following configuration:
> lustrebox: /lust mounted on "GATEWAY" over IB
> GATEWAY: export /lust as nfs4 on 10G interface
> VM(test.vm): import as NFS over 10G interface
>
> [r...@test.vm  ~]# dd  if=/dev/zero bs=128K count=10
>

Without oflag=direct, you are hitting (somewhat) the cache.


>
> of=/test/tmp/test.tmp
> 10+0 records in
> 10+0 records out
> 1310720 <(310)%20720-> bytes (13 GB) copied, 20.8402 s, 629 MB/s
> looks promising for the future deployments.
>

Very - what's the backend storage?


>
> only one problem remains that on heavy io I get some wornings that the vm
> network is saturated, are there way to configure the bandwidth limits to
> 10G for the VM Interface??
>

Yes, but you really need a dedicated storage interface, no?
Y.


>
>
> thank you beforehand,
> Arman.
>
> ___
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
>
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