[one-users] Best Practice - Storage Backend

[Joerg Mauer]

Hi,

you might want to look at the shared_lvm approach that does not use clvm
(I couldn´t get that to work properly on Ubuntu 12.04):

http://community.opennebula.org/shared_lvm

There is a addon repo for it on github,
unfortunately it´s empty ;-)

https://github.com/OpenNebula/addon-shared-lvm-single-lock

regards,

joerg

Am 08.08.2014 09:02, schrieb InterNetX - Juergen Gotteswinter:
>  Hello Nebula Users,
> 
> i am curious what others are using as Storage Backend, since i spent
> plenty of time trying to get block LVM or FS LVM to work reliable. CLVM
> seems like a cure to me, and from what i could find through Google so
> far i am not the only one who experienced things like (everything on a 4
> Node Cluster, seperate Management System for Opennebula/Sunstone -
> Nebula 4.6 and 4.7.80):
> 
> - whole Cluster dying / hangs (no more VG/LV Operations possible) if one
> Node decides to die
> - unreliable if several VM get deployed at once (didnt investigate further)
> 
> i tried:
> 
> - CentOS 6 based KVM Hosts, cman/clvmd based Setup
> - CentOS 7 based KVM Hosts, Corosync/clvmd (feels little bit better, but
> still not like something i whould consider for Production)
> 
> 
> What i wanted to avoid is Using NFS as Backend, the Experience over the
> last few years with NFS as Backend for Images is not the best in term of
> Performance (if you want to make sure your data stays consistent, eg
> using sync NFS).
> 
> Block Device, in form of a LV or similar things like ZVOL is where we
> got best experience over years with other Virtualization Platforms.
> Thats something i want to keep for sure.
> 
> Since the Hostsystems are pretty huge, there wont be just run a hand
> full of VM on this Setup (1TB Ram avail. in this Setup for the
> beginning). So one has to keep in mind that its not a small scale Setup.
> 
> Every shared experience / or maybe hint how to deal right with CLVM is
> highly appreciated.
> 
> Cheers,
> 
> Juergen
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