Maintenance of mirrored filesystem

[Zachary Crownover]

if live dedup is uncommenting the section in the hammer config on each PFS,
I've been doing it for years on every system.

On Dec 15, 2017 11:33 AM, "Tomohiro Kusumi" <kusumi.tomohiro at gmail.com>
wrote:

> Note that using live dedup on H1 is not recommended (by Matt).
> I don't think anyone is really using it too.
>
> 2017-12-15 21:24 GMT+02:00 Zachary Crownover <zachary.crownover at gmail.com
> >:
> > Also turning on dedup can save space
> >
> > On Dec 15, 2017 10:50 AM, "John R. Shannon" <john at johnrshannon.com>
> wrote:
> >>
> >> Thank you. That got it.
> >>
> >> On 12/15/17 10:49, Tim Darby wrote:
> >> > On Fri, Dec 15, 2017 at 8:24 AM, John R. Shannon <
> john at johnrshannon.com>
> >> > wrote:
> >> >
> >> >> I setup hammer filesystems on identical disk drives. I created a
> number
> >> >> of PFS that are mirrored. Over time, the storage allocation on the
> >> >> MASTER has remained constant while it continues to grow on the SLAVE
> as
> >> >> shown in the following:
> >> >>
> >> >> MASTER                   5588G  1456G  4132G    26%    /master
> >> >> SLAVE                    5588G  2775G  2813G    50%    /slave
> >> >> /master/pfs/@@-1:00002   5588G  1456G  4132G    26%
> >> >> /master/backups/dns
> >> >> /master/pfs/@@-1:00001   5588G  1456G  4132G    26%
> >> >> /master/backups/colleen
> >> >> /master/pfs/@@-1:00003   5588G  1456G  4132G    26%
> >> >> /master/backups/domain0
> >> >> /master/pfs/@@-1:00004   5588G  1456G  4132G    26%
> >> >> /master/backups/imap
> >> >> /master/pfs/@@-1:00005   5588G  1456G  4132G    26%    /master
> >> >>
> >> >> ...
> >> >>
> >> >> Am I missing a maintenance step that needs to be performed on the
> >> >> slave?
> >> >
> >> >
> >> > By default, the daily periodic script for hammer cleanup only works on
> >> > mounted volumes, so that's why your unmounted slaves are not being
> >> > cleaned
> >> > up. You can tell it to clean up unmounted volumes by adding this line
> to
> >> > /etc/periodic.conf:
> >> >
> >> > daily_clean_hammer-pfslist="path_to_first_unmounted_pfs
> >> > path_to_second_unmounted_pfs etc"
> >> >
> >> > The unfortunate side effect of this is that will cause it to stop
> >> > cleaning
> >> > up mounted PFSes, so I created a separate hammer cleanup script in
> >> > /etc/periodic/daily that cleans up the mounted ones.
> >> >
> >> > Tim
> >> >
> >>
> >> --
> >>
> >> John R. Shannon
> >> john at johnrshannon.com
>
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