Re: [zfs-discuss] mounting a copy of a zfs pool /file system while orginal is still active

[Dave Lowenstein]

Try it, it doesn't work.

Format sees both but you can't import a clone of pool "u001" if pool 
"u001" is already imported, even by giving it a new name.



Darren J Moffat wrote:
> Dave Lowenstein wrote:
>> Nope, doesn't work.
>>
>> Try presenting one of those lun snapshots to your host, run cfgadm 
>> -al, then run zpool import.
>>
>>
>> #zpool import
>> no pools available to import
>
> Does format(1M) see the luns ?  If format(1M) can't see them it is 
> unlikely that ZFS will either.
>
>> It would make my life so much simpler if you could do something like 
>> this: zpool import --import-as yourpool.backup yourpool
>
>  zpool import [-o mntopts] [ -o property=value] ... [-d dir |
>  -c cachefile] [-D] [-f] [-R root] pool | id [newpool]
>
>  Imports a specific pool. A pool can be identified by its
>  name or the numeric identifier. If newpool is specified,
>  the pool is imported using the name newpool.  Otherwise,
>  it is imported with the same name as its exported name.
>
>
> # zpool import foopool barpool
>
>
>

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Re: [zfs-discuss] mounting a copy of a zfs pool /file system while orginal is still active

[Dave Lowenstein]

Nope, doesn't work.

Try presenting one of those lun snapshots to your host, run cfgadm -al, 
then run zpool import.



#zpool import
no pools available to import


It would make my life so much simpler if you could do something like 
this: zpool import --import-as yourpool.backup yourpool








Tim wrote:
On 1/31/08, *Hector De Jesus* <[EMAIL PROTECTED] 
> wrote:


Hello SUN gurus I do not know if this is supported, I have a
created a zpool consisting of the SAN resources and created a zfs
file system.  Using third part software I have taken snapshots of
all luns in the zfs pool.  My question is in a recovery situation
is there a way for me to mount the snapshots and import the pool
while the original is still active.  Right now all I am able to do
is export the original than I can  import the snapshots and access
the zpool and filesystem.  Im looking at a no downtime solution
can this be done ?


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Interesting thought.  I guess what you'd have to have is an import 
flag that allows you to "import as".  So you could:


zpool import --import-as yourpool.backup yourpool

I definitely see why you'd want to do it.  I haven't a clue if you can :)

--Tim


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Re: [zfs-discuss] ? Removing a disk from a ZFS Storage Pool

[Dave Lowenstein]

Couldn't we move fixing "panic the system if it can't find a lun" up to 
the front of the line? that one really sucks.



John wrote:
> I asked the question last week.. the reply i got from Matt was:
>
> It's still a high priority on our road map, just pushed back a bit. Our
> current goal is to integrate into OpenSolaris sometime this summer.
>
> --matt
>  
>  
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[zfs-discuss] x4500 recommendations for netbackup dsu?

[Dave Lowenstein]

Okay, my order for an x4500 went through so sometime soon I'll be using 
it as a big honkin area for DSUs and DSSUs for netbackup.

Does anybody have any experience with using zfs compression for this 
purpose? The thought of doubling 48tb to 96 tb is enticing. Are there 
any other zfs tweaks that might aid in performance for what will pretty 
much be a lot of long and large reads and writes?

I'm planning on one big chunk of space for a permanently on disk DSU, 
and another for the DSSU staging areas.

Also, I haven't looked into this but is a spare considered part of a 
zpool, or is there such a thing as a global spare?
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[zfs-discuss] Move zpool of 3 disks to a single disk?

[Dave Lowenstein]

So we have a zpool that was grown over time by using the 'zpool add' 
command to add some space. This has ended up with a zpool made of three 
devices on our old hp san. This is on solaris 10 sparc.

I want to move the zpool to fc netapp storage using zpool replace, 
completely getting it off the HP. I can't just replace the 3 devices 
with one big one, right? I'm thinking I'll have to make 3 equivalently 
sized luns on the netapp and "zpool replace" them individually. This 
ideally will happen with the zpool up and available.

Am I on the right track here?
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