[ovirt-users] Re: RAID L1/L5/L10 + NFS Loopback Benchmarks

2018-11-28 Thread Derek Atkins 
Simone Tiraboschi  writes:

> On Wed, Nov 21, 2018 at 10:08 AM Andrei Verovski  wrote:
>
> Hi !
>
> Deadlock of NFS loopback happens with 3.10 stock kernel from CentOS 7.6
> only or also with 4.x mainline ?
>
> I use 4.x mainline on my nodes.
>
> AFAIK is still an open issue.
>

FWIW, I've been running with an NFS loopback and have never, in 3+
years, had an issue.  On the other hand, I am very over-provisioned and
under-subscribed on RAM, so it probably never really gets into a
situation where it has to swap.

-derek
-- 
   Derek Atkins 617-623-3745
   de...@ihtfp.com www.ihtfp.com
   Computer and Internet Security Consultant
___
Users mailing list -- users@ovirt.org
To unsubscribe send an email to users-le...@ovirt.org
Privacy Statement: https://www.ovirt.org/site/privacy-policy/
oVirt Code of Conduct: 
https://www.ovirt.org/community/about/community-guidelines/
List Archives: 
https://lists.ovirt.org/archives/list/users@ovirt.org/message/JDWIDN2YE7TL5IU4G3TCB2CVFMQU7AUE/

[ovirt-users] Re: RAID L1/L5/L10 + NFS Loopback Benchmarks

2018-11-21 Thread Simone Tiraboschi 
On Wed, Nov 21, 2018 at 10:08 AM Andrei Verovski 
wrote:

> Hi !
>
> Deadlock of NFS loopback happens with 3.10 stock kernel from CentOS 7.6
> only or also with 4.x mainline ?
>
> I use 4.x mainline on my nodes.
>
>
AFAIK is still an open issue.



>
>
> On 19 Nov 2018, at 12:59, Simone Tiraboschi  wrote:
>
>
>
> On Sun, Nov 18, 2018 at 12:58 PM Andrei Verovski 
> wrote:
>
>> Hi !
>>
>> I run a series of benchmarks with IOZONE testing performance of
>> different RAID configurations on HP ProLiant DL380 + impact of NFS
>> loopback.
>>
>> NFS loopback is necessary even for very small systems (e.g. just 2
>>
>
> AFAIK NFS loopback is still considered a bad practice and it's still
> strongly recommended against since it could lead to deadlock and data loss.
> See https://access.redhat.com/solutions/22231
> I'd strongly recommend a single node hyper-converged gluster over that.
>
>
>> nodes), since oVirt local storage setup is limited to single (only one)
>> node per data center and this is quite useless from the point of view of
>> functionality.
>>
>> Full article:
>> http://www.vacuum-tube.eu/wp/?p=537
>>
>> Short YouTube slide show:
>> https://www.youtube.com/watch?v=Xw_VN9G8jSI
>>
>> Related video:
>> Moving away from local storage setup to NFS/GlusterFS
>> https://www.youtube.com/watch?v=2ebhZ5U6x_Y
>> ___
>> Users mailing list -- users@ovirt.org
>> To unsubscribe send an email to users-le...@ovirt.org
>> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
>> oVirt Code of Conduct:
>> https://www.ovirt.org/community/about/community-guidelines/
>> List Archives:
>> https://lists.ovirt.org/archives/list/users@ovirt.org/message/OCXJAMVDUVLZR5YUR26GD3CTOM4LJCJZ/
>>
>
>
___
Users mailing list -- users@ovirt.org
To unsubscribe send an email to users-le...@ovirt.org
Privacy Statement: https://www.ovirt.org/site/privacy-policy/
oVirt Code of Conduct: 
https://www.ovirt.org/community/about/community-guidelines/
List Archives: 
https://lists.ovirt.org/archives/list/users@ovirt.org/message/MLHNJNBADLKYTI5PTZQ4KRAWJJCJWQWE/

[ovirt-users] Re: RAID L1/L5/L10 + NFS Loopback Benchmarks

2018-11-21 Thread Andrei Verovski 
Hi !

Deadlock of NFS loopback happens with 3.10 stock kernel from CentOS 7.6 only or 
also with 4.x mainline ?

I use 4.x mainline on my nodes.



> On 19 Nov 2018, at 12:59, Simone Tiraboschi  wrote:
> 
> 
> 
> On Sun, Nov 18, 2018 at 12:58 PM Andrei Verovski  > wrote:
> Hi !
> 
> I run a series of benchmarks with IOZONE testing performance of 
> different RAID configurations on HP ProLiant DL380 + impact of NFS loopback.
> 
> NFS loopback is necessary even for very small systems (e.g. just 2 
> 
> AFAIK NFS loopback is still considered a bad practice and it's still strongly 
> recommended against since it could lead to deadlock and data loss.
> See https://access.redhat.com/solutions/22231 
> 
> I'd strongly recommend a single node hyper-converged gluster over that.
>  
> nodes), since oVirt local storage setup is limited to single (only one) 
> node per data center and this is quite useless from the point of view of 
> functionality.
> 
> Full article:
> http://www.vacuum-tube.eu/wp/?p=537 
> 
> Short YouTube slide show:
> https://www.youtube.com/watch?v=Xw_VN9G8jSI 
> 
> 
> Related video:
> Moving away from local storage setup to NFS/GlusterFS
> https://www.youtube.com/watch?v=2ebhZ5U6x_Y 
> 
> ___
> Users mailing list -- users@ovirt.org 
> To unsubscribe send an email to users-le...@ovirt.org 
> 
> Privacy Statement: https://www.ovirt.org/site/privacy-policy/ 
> 
> oVirt Code of Conduct: 
> https://www.ovirt.org/community/about/community-guidelines/ 
> 
> List Archives: 
> https://lists.ovirt.org/archives/list/users@ovirt.org/message/OCXJAMVDUVLZR5YUR26GD3CTOM4LJCJZ/
>  
> 

___
Users mailing list -- users@ovirt.org
To unsubscribe send an email to users-le...@ovirt.org
Privacy Statement: https://www.ovirt.org/site/privacy-policy/
oVirt Code of Conduct: 
https://www.ovirt.org/community/about/community-guidelines/
List Archives: 
https://lists.ovirt.org/archives/list/users@ovirt.org/message/QTFGVQUR6GVNLAZJ25PYCWBWEAJCAJEB/

[ovirt-users] Re: RAID L1/L5/L10 + NFS Loopback Benchmarks

2018-11-19 Thread Simone Tiraboschi 
On Sun, Nov 18, 2018 at 12:58 PM Andrei Verovski 
wrote:

> Hi !
>
> I run a series of benchmarks with IOZONE testing performance of
> different RAID configurations on HP ProLiant DL380 + impact of NFS
> loopback.
>
> NFS loopback is necessary even for very small systems (e.g. just 2
>

AFAIK NFS loopback is still considered a bad practice and it's still
strongly recommended against since it could lead to deadlock and data loss.
See https://access.redhat.com/solutions/22231
I'd strongly recommend a single node hyper-converged gluster over that.


> nodes), since oVirt local storage setup is limited to single (only one)
> node per data center and this is quite useless from the point of view of
> functionality.
>
> Full article:
> http://www.vacuum-tube.eu/wp/?p=537
>
> Short YouTube slide show:
> https://www.youtube.com/watch?v=Xw_VN9G8jSI
>
> Related video:
> Moving away from local storage setup to NFS/GlusterFS
> https://www.youtube.com/watch?v=2ebhZ5U6x_Y
> ___
> Users mailing list -- users@ovirt.org
> To unsubscribe send an email to users-le...@ovirt.org
> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
> oVirt Code of Conduct:
> https://www.ovirt.org/community/about/community-guidelines/
> List Archives:
> https://lists.ovirt.org/archives/list/users@ovirt.org/message/OCXJAMVDUVLZR5YUR26GD3CTOM4LJCJZ/
>
___
Users mailing list -- users@ovirt.org
To unsubscribe send an email to users-le...@ovirt.org
Privacy Statement: https://www.ovirt.org/site/privacy-policy/
oVirt Code of Conduct: 
https://www.ovirt.org/community/about/community-guidelines/
List Archives: 
https://lists.ovirt.org/archives/list/users@ovirt.org/message/U64GONBFXP2PHC52HY3ML2FPORYT55JK/