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DragonFly users List (threaded) for 2010-04
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Re: Does the Slave pfs take up more space that the Master?

From: Antonio Huete Jimenez <ahuete.devel@xxxxxxxxx>
Date: Fri, 16 Apr 2010 12:26:28 +0200

Hi Matt,

As 'hammer info' directive does, the only way I know to do this would
be to go through all the PFS until the max (HAMMER_MAX_PFS), if no one
has come with a better idea or solution.

Actually, this should be pretty straightforward if you just go through
all the PFS, identify the ones that exist and then you just simply
perform the cleanup on the @@ link. i.e:

antonioh@smash> hammer cleanup /@@-1:00007
cleanup /@@-1:00007          - handle PFS #7 using /var/hammer/@@-1:00007
           snapshots - disabled
               prune - run
           rebalance - run..
             reblock - run....
              recopy - run....

Dunno tho if this solution would be optimal.

I would like to takeover this activity if no one is interesed.

Antonio Huete

2010/4/16 Matthew Dillon <dillon@apollo.backplane.com>:
> :What i remember happened to me was that master pfs are pruned/reblocked by
> :the periodic but the slave pfs are not, so time to time i used to get a lot
> :of used space in my backups, just go and prune/reblock by hand and check if
> :thats what happening to you, check the config before, so you sure not
> :deleting stuff you dont want to.
> :Damian
> :
> :On Mon, Apr 12, 2010 at 04:03, Siju George <sgeorge.ml@gmail.com> wrote:
> :
> :> Hi,
> :>
> :> I have two hammer file systems.
> :>
> :> Backup1                   454G   281G   173G    62%    /Backup1
> :> Backup2                   454G   316G   138G    70%    /Backup2
>    Yes, I was trying to think of scenarios and I think you are close,
>    that is likely the reason.  The hammer cleanup code is only scanning
>    mounted PFSs.  I verified this by umounting my /var/crash (which is
>    a PFS) and running hammer cleanup.  It didn't check /var/crash's
>    PFS.
>    So its not master/slave, it is simply whether the PFS is mounted or
>    not that is the problem.
>    This is definitely a bug.  hammer cleanup needs to go through all
>    the PFSs.  It would be a nice mini-programming-project for someone
>    who wants to fix it in the hammer utility.
>                                                -Matt

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