Re: ETCP Project

[Josef Höök <josef.hook@arrowhead.se>]

Greg Lindahl skrev:

> > > It wouldn't be hard to have system calls which read execute only on
> > > the local node, and system calls which write get executed on the local
> > > and remote node. Voila, it's a HA component.
> >
> > I don't understand.  Read what execute only on the local system?
> > If it's by system call, then there's no local data to read locally.  I'm
> > confused.
>
> I didn't explain it fully.
>
> The basic ForwardFS is forwarding system calls to another system, so
> it can have any filesystem on the remote system, and there is no local
> data on disk.
>
> The HigherAvailabilityMirrorFS I described is a filesystem that can
> execute a given system call in 2 places: (1) against a local
> underlying filesystem (of any kind), and (2) against a remote
> underlying filesystem (of any kind). PVFS is actually forwarding the
> call up to a user-level process. In order to keep the 2 underlying
> filesystems synchronized, you need to do all writes against both, but
> reads only need to go against 1. (Screw atime.)
>

Have you given a thought that you maybe are reinventing the wheel.
Take a look at the 9p/IL protocol for plan9, but also the kOrbit project at
sourceforge.
/joh
--
C++ is just for people who's lacking a development organisation.

>
> -- g
>
> Linux-cluster: generic cluster infrastructure for Linux
> Archive:       http://mail.nl.linux.org/linux-cluster/


Linux-cluster: generic cluster infrastructure for Linux
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