Pruning dead devices

[Brad Fitzpatrick]

Here ya go... new release:

    http://danga.com/dist/MogileFS/MogileFS-Utils-2.10.tar.gz

2.10 -- 2007-05-14

  * mogadm check no longer shows dead devices

  * mogadm device list no longer shows devices, UNLESS you do:
    mogadm device list --all

  * allow setting a setting to "" (empty string)



On Mon, 14 May 2007, Jared Klett wrote:

> ah, I see. I think an option to hide 'dead' devices in mogadm would be
> the way to go.
>
> -----Original Message-----
> From: Brad Fitzpatrick [mailto:brad at danga.com]
> Sent: Monday, May 14, 2007 5:37 PM
> To: Jared Klett
> Cc: mogilefs at lists.danga.com
> Subject: Re: Pruning dead devices
>
> I think we never implemented it because we didn't want people to delete
> devices when there were still files on it... (even if they're destroyed
> and not accessible, they still have "files" on it as far as the tracker
> is concerned... in the file_on table, and they need to be migrated away,
> so the device stub has to exist for the internals... and another device
> with the same number can't come along into existence in the meantime)
>
> But I think we could allow devices to be deleted once they're empty...
> but then how do you know they're empty, as a sysadmin?  mogadm would
> have to show "dead" vs "dead+migrated away clean".  But that's ugly.
>
> So why don't we just hide 'dead' devices in mogadm check?
>
> I'm just brainstorming... any better ideas?
>
>
> On Mon, 14 May 2007, Jared Klett wrote:
>
> > hello Mogilers,
> >
> > 	I just upgraded our MogileFS cluster to 2.16 and it's working
> > fabulously - the rebalancing feature is a real lifesaver.
> >
> > 	however, early on we had a batch of bad drives in one of our
> servers
> > and as such have a bunch of dead devices hanging around that make
> > 'mogadm check' rather unsightly and hard to read.
> >
> > 	is there a way to get rid of those dead devices? I've seen
> references
> > in the documentation to 'mogadm device delete host ##' but running
> > that just gives "Help for 'device' command" as output.
> >
> > 	is it no longer possible to delete devices, or is there another
> way?
> >
> > cheers,
> >
> > - Jared
> >
> > --
> > Jared Klett
> > Co-founder, Blip.tv
> > http://blog.blip.tv
> >
> >
>
>