[lustre-discuss] slow write performance from client to server

Riccardo Veraldi Riccardo.Veraldi at cnaf.infn.it
Tue Oct 16 02:12:39 PDT 2018


On 10/16/18 2:08 AM, George Melikov wrote:
> Please post your benchmark method.

my benchmark method is by using bbcp.

lustre clients 2.10.5 on RHEL7  are fast (1.1GB/s) while RHEL6 clients 
using 2.8.0 perform very poorly (2MB/s)


>
> ____________________________________
> Sincerely,
> George Melikov,
> Tel. 7-915-278-39-36
> Skype: georgemelikov
>
>
> 16.10.2018, 12:03, "Riccardo Veraldi" <riccardo.veraldi at cnaf.infn.it>:
>> On 10/15/18 4:59 PM, Alexander I Kulyavtsev wrote:
>>>   You can do a quick check with 2.10.5 client by mounting lustre on MDS if you do not have free node to install 2.10.5 client.
>>>
>>>   Do you have lnet configured with IB or 10GE? LNet defaults to tcp if not set. Can it be you are connected through slow management network?
>>>
>>>   Alex.
>> hi, my lnet is configured with both IB and 10GE. it is using IB I
>> verified it and anyway performance is very slow even if it where just
>> using tcp on 10GE
>>
>> since I only get 2MB/s
>>
>> thanks
>>
>>>   On 10/15/18, 6:41 PM, "lustre-discuss on behalf of Riccardo Veraldi" <lustre-discuss-bounces at lists.lustre.org on behalf of Riccardo.Veraldi at cnaf.infn.it> wrote:
>>>
>>>        Hello,
>>>
>>>        I have a new Lustre FS version 2.10.5. 18 OSTs 18TB each on 3 OSSes.
>>>
>>>        I noticed very slow performances couple of MB/sec when RHEL6 Lustre
>>>        clients 2.8.0 are writing to the fielsystem.
>>>
>>>        Could it be a Lustre version problem server vs client ?
>>>
>>>        I have no errors either on server or client side that can debug it
>>>        further...
>>>
>>>        thanks
>>>
>>>        Rick
>>>
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