Brian Cuttler wrote:

On Thu, Aug 27, 2009 at 04:26:10PM -0400, Chris Hoogendyk wrote:

Brian Cuttler wrote:

Well, looks like we shot ourselves in the foot.

disklist - finsen  /export zfs-snapshot

[finsen] ~ 61> cd /exp*
[finsen]: /export > ls
home/  pax/  samba/  source/  testing/  zones/

Looks like it'll backup everything - however if you create
additional mountpoints...

[finsen]: /export > zfs list | more
NAME                                      USED  AVAIL  REFER  MOUNTPOINT
finsenp                                   136G   132G  28.4K  /finsenp
finsenp/export                            136G   132G  33.6G  /export
finsenp/export/home                      55.0G  73.0G  71.0K  /export/home

finsenp/export/home/agaupel 32.9K 9.97M 32.9K /export/home/agaup

el

finsenp/export/home/amanda 33.1M 73.0G 33.1M /export/home/amand

a

finsenp/export/home/bhowland 9.71G 73.0G 9.71G /export/home/bhowl

and

finsenp/export/home/dkim 32.9K 9.97M 32.9K /export/home/dkim

it is as if the file systems are not subdirectories of one
another and you don't get backups of /export/home nor /export/home/<user>

Is this what other people on this list with ZFS are seeing ?

I recognize this as a ZFS side-effect and not an amanada issue.

But I'm now forced ot ask if there is an amanda solution, or for
that matter, as I migrate my users to this new system if amanda
will support in excess of 1000 DLEs in a single config/disklist.

Aside from Dustin's answer and howto for Amanda, . . .

You're creating user home directories with zfs create, rather than with mkdir? So each home directory ends up being a separate zfs file system? Thus, with the ability to apply zfs quotas and reservations? That sounds kind of complicated.

the idea of per user quotas was extreemly attractive, and it
_seemed_ like such a good idea when our ZFS manager proposed it...

Actually we have per user quotes on the current UFS file system,
which is ok for many of the users, but we have those few who say

things like - its easier to find stuff in my home directory, I don't

           want to bother with project directories on other drives.
        - Just create a few hundred gig of dead space, that way when
          you need space you have it reserved and can just delete
          something.

Things like NMR or scanning EM microscopes produce large data files...
we are just trying to keep the users from harming one another.

--
---------------

Chris Hoogendyk

-
  O__  ---- Systems Administrator
 c/ /'_ --- Biology & Geology Departments
(*) \(*) -- 140 Morrill Science Center

<hoogendyk AT bio.umass DOT edu>

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