Re: Akonadi on NFS

Am Donnerstag, 6. Mai 2010 13:50:37 schrieb Martin Steigerwald:
> Hi!
> 
> I heard about problems regarding Akonadi on NFS. Confirmed here:
> 
> -----------------------------------------------
>   Deployment issues
> 
> [...]
>     * InnoDB tables should not be used on NFS.
>     * NFS speed: MySQL documentation recommends against locating its data
> files on network shares. -----------------------------------------------
> 
> http://techbase.kde.org/Projects/PIM/Akonadi#Deployment_issues
> 
> Regarding InnoDB I read:
> 
> -----------------------------------------------
> Warning
> 
> It is not a good idea to configure InnoDB to use data files or log files on
> NFS volumes. Otherwise, the files might be locked by other processes and
> become unavailable for use by MySQL.
> -----------------------------------------------
> 
> http://dev.mysql.com/doc/refman/5.5/en/innodb-restrictions.html
> 
> How serious are these? Does anyone already use Akonadi on NFS? If yes, how
> well does it work? Is Akonadi usable on NFS based homes at all?

Yes, it is perfectly usable. On my system all home directories (except root of 
course) are on the NFS server. But I am currently thinking about a windows 
like behaviour. At login copy some (all) files to a local directory and on 
logout copy them back to the server.

The main problem with NFS are network breakages. Depending on your NFS 
configuration you can corrupt your database file. I had it once with digikam 
(but this is almost two years ago - and I am not sure that it was caused by 
NFS). 

If your network and your server is reliable there is nothing wrong with 
akonadi on NFS.

Martin

> 
> If not, I will hold back KDE 4 upgrade for our company until it is. Since I
> won't ditch NFS in favor of Akonadi.
> 
> We have a similar issue with Zimbra, which we just run partly on NFS, but I
> heard that in theory MySQL should be able to run via NFS. With Zimbra its
> quite easy, since its a server in a virtual machine. But KDE is
> client-side and a KDE session for one user might be run on different
> workstations or even via OpenVPN tunneled NFS.
> 
> Ciao,