Snapshots ordering on slave and pfs according to freequency for snapshot management

[Siju George]

On Sat, Apr 24, 2010 at 11:16 PM, Matthew Dillon
<dillon at apollo.backplane.com> wrote:
>    So, here's an example.  Lets say you have:
>
>        /samba_export           Your samba export hierarchy
>        /hammer                 Your hammer filesystem
>        /hammer/pfs/blah        Some PFS in the hammer filesystem
>
>    And now lets asy you want to make snapshots from PFS(s) in the hammer
>    filesystem available to the export.  This would work:
>
>        mkdir /samba_export/fubar
>        mount_null /hammer/pfs /samba_export/fubar
>

If I do this then all the pfses under /hammer/pfs will be exported using samba

I guess you meant

mount_null /hammer/pfs/blah /samba_export/fubar

?

That is what I did for the Master pfs

 /Backup1     - Hammer File System

/Backup1/www-5mbak    - Samba export Directory

and mount

/Backup1/pfs/www-hot      /Backup1/www-5mbak/www-hot    null    rw
         0       0

But the problem is that a slave PFs cannot be mounted. So My problem
is what I do with the slave PFS :-(


>
>    You may have other issues... tracking the snapshots could present
>    a problem since hammer cleanup only allows one snapshot directory
>    to be specified.  So you might have to come up with a little script
>    to maintain a second set of snapsoft softlinks with the proper samba
>    path which mirrors the master set which hammer cleanup maintains.
>    Otherwise you will wind up with a lot of stale snapshot softlinks.
>
>

I Initially planned to take the 5 mins snapshots on the Master
andDaily snapshots on the slave.
So I can export by Samba 2 shares. One having the links to the 5 mins
backup( for 2 days )  and other having the links to the Daily backup (
2000 days or old )

All I need is to figure out how to remove the 5mins snapshots that
gets mirrored on the slave older than two days with out removing the
daily snapshots.

But I am a bit confused now since I dont see snapshots actually
removed after a hammer cleanup.
I will send the details with a new subject

thanks

--Siju