[DRBD-user] Upgrade from 0.7 to 0.8 possible without data loss?

Lars Ellenberg lars.ellenberg at linbit.com
Mon Apr 23 09:52:57 CEST 2007

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Sun, Apr 22, 2007 at 11:12:10PM +0200, Oliver Welter wrote:
> Hi,
> as I am experiencing problems with 0.7er branch I tried out 0.8 and it 
> seems to work.
> 1) Is there a way to keep 0.7 and 0.8 in sync at least "one way" from 
> 0.7 as primary and 0.8 as slave during the update


> 2) Can I keep my data parts of the disks - I use internal meta-data 
> storage? I tried "drbdadm create-md test" on a test partition and it 
> SEEMS to work - but before I destroy any valuable data I want to go for 
> sure....

it "should" work. it is intended to be used that way.
it did work for us in our testing environments.
but in case it eats your data for some reason,
and you don't have backups, that would be your problem, not mine ...

> thx to the linbit team for this great piece of software ;)

to avoid unneccessary fuss during an upgrade from 0.7 to 8.0.3
(which should be released this week),
make sure you are in "Connected Secondary/Secondary"
before you actually shutdown and unload the old version,
convert the meta data and go ahead with the upgrade.

but. thinking HA,
when 0.7.23 works for you, why would you want to upgrade a reliably
working known good production platform to a new version,
when you don't need the new features?

I mean, if you set up a new cluster, use 8.0.x.
if you think you want the new features, sure, go ahead with the upgrade.

but upgrading a known good HA platform just because there is a new
version with new features you don't need...
I think thats not how HA works.


: Lars Ellenberg                            Tel +43-1-8178292-0  :
: LINBIT Information Technologies GmbH      Fax +43-1-8178292-82 :
: Vivenotgasse 48, A-1120 Vienna/Europe    http://www.linbit.com :
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