[gfarm-discuss:32463] Re: New to Gfarm: limitations?

[Osamu Tatebe <tatebe@xxxxxxxxxxxxxxxx>]

Hi Jordan,

df (and gfdf) is now available for Gfarm v2.

Osamu

From: Osamu Tatebe <tatebe@xxxxxxxxxxxxxxxx>
Subject: [gfarm-discuss:30288] Re: New to Gfarm: limitations?
Date: Fri, 11 Apr 2008 09:06:32 +0900

> Hi Jordan,
> 
> > Is there any type of estimated time frame for chown and df/statfs to be
> > implemented?
> 
> df is easy to implement. but chown is not since we do not have
> global uid or global gid.
> 
> > Also, what is the difference between gfarm2fs-1.0 and
> > gfarmfs-fuse-2.0?<http://sourceforge.net/project/showfiles.php?group_id=172718&package_id=225131>
> 
> gfarm2fs is for Gfarm v2, while gfarmfs-fuse is for Gfarm v1.
> 
> gfarmfs-fuse has richer functionalities than gfarm2fs for example
> it has the -N option to specify the number of default file copies.
> The reason why gfarm2fs is developed is gfarmfs-fuse is too complex
> to support Gfarm v2 (at least for me).  When Ishibashi-kun (a
> developer of gfarmfs-fuse) finishes porting to Gfarm v2, we will
> have two choices.
> 
> > Do you have any examples of existing programs or implementations like this?
> > I am wondering if there is an easy way to implement this as part of our v2
> > test cluster.
> 
> There are some research stuffs, but not available for now.
> 
> > I will be doing some of this research, so will keep you posted as I make
> > comparisons.
> 
> That would be great!
> 
> Thanks,
> Osamu
> 
> On Thu, 10 Apr 2008 12:30:53 -0700
> "Jordan Mendler" <jmendler@xxxxxxxx> wrote:
> 
> > Hi Osamu, thanks for the response and all of your hard work on this project.
> > A few follow up questions:
> > 
> > Not for now.  Regarding gfarm2fs, the following functionalities
> > > are not implemented;
> > >
> > > - uid for another person
> > > - gid
> > > - nlink for directory
> > > - readlink(2), symlink(2), link(2)
> > > - chown(2) to another person (this is available by gfchown)
> > > - statfs(2) (df does not work right now, but will be implemented soon)
> > > - xattr
> > >
> > 
> > Is there any type of estimated time frame for chown and df/statfs to be
> > implemented?
> > 
> > Also, what is the difference between gfarm2fs-1.0 and
> > gfarmfs-fuse-2.0?<http://sourceforge.net/project/showfiles.php?group_id=172718&package_id=225131>
> > 
> > 
> > > Basically it can be managed by an upper-level management layer
> > > than the Gfarm file system, although we do not have such a system
> > > fow now.
> > 
> > 
> > Do you have any examples of existing programs or implementations like this?
> > I am wondering if there is an easy way to implement this as part of our v2
> > test cluster.
> > 
> > > 5) If anyone has any experience, how does Gfarm compare to some of the
> > > other
> > > > distributed filesystems? Lustre lacks true HA (only through
> > > shared-storage
> > > > and heartbeat), but GlustreFS and cleversafe look promising. Perhaps
> > > someone
> > > > can shed some insight as to how Gfarm compares.
> > >
> > 
> > I will be doing some of this research, so will keep you posted as I make
> > comparisons.
> > 
> > 
> > Thanks so much,
> > Jordan