Dear Lynn et al.

to summarise, unless stated differently in the respective release notes, MonetDB supports database upgrades from an older to a newer version in the following cases:
- from a feature release or bugfix release to a newer bugfix release of the same feature release, e.g., from the Jul2015 feature release to its second bugfix release Jul2015-SP2;
- from a feature release or bugfix release to the next feature release or one of its bugfix releases, e.g., from the Jul2015-SP3 bugfix release to the Jun2016 feature release or its Jun2016-SP2 bugfix release (as in your case).

We strong recommend, though, to backup your data/database(s) (i.e., dbfarm) before any upgrade.

We never support downgrades from a newer to any older version of MonetDB.

Feature releases are identified by a release name without "-SPx" (SP as in service pack) suffix, while the release name of bugfix releases has such suffix. Hence, between the Jul 2015-SP3 bugfix release and the Jun2016-SP2 bugfix release was the Jun2016 feature release.

And: "upgrading databases" refers to continuing using the same dbfarm (exclusively) with a newer version of MonetDB.

I hope, this helps to clarify.

Best,
Stefan

On October 17, 2016 12:00:24 AM GMT+02:00, Lynn Carol Johnson <lcj34@cornell.edu> wrote:

I”m confused now. Our db has already been upgraded. We went directly from Jul2015-Sp3 to Jun2016-SP2. Was there a feature release in-between these 2? Am I ok using the same dbfarm for both these releases?

I will try to schedule upgrades as the fixes come out in the future.

Thanks - Lynn

From: users-list <users-list-bounces+lcj34=cornell.edu@monetdb.org> on behalf of Brian Hood <brianh6854@googlemail.com>
Reply-To: Communication channel for MonetDB users <users-list@monetdb.org>
Date: Sunday, October 16, 2016 at 2:30 PM
To: Communication channel for MonetDB users <users-list@monetdb.org>
Subject: Re: new monetdb version, old farm

Hi Lynn,

Like Soerjd mentioned previously you should upgrade in sequence so try not get behind in releases.

Also as I found out the hard way it's impossible to downgrade.

It plays havoc with your BBP version and catalog from memory.

Regards,

Brian Good

On Oct 16, 2016 1:21 PM, "Lynn Carol Johnson" <lcj34@cornell.edu> wrote:

To verify: You¹re saying my upgrade from Jul2015-SP3 to Jun2016-SP2 does
not require a database recreation as the farm is not that old? This would
be great.

Thanks - Lynn

On 10/14/16, 5:08 PM, "users-list on behalf of Martin Kersten"
<users-list-bounces+lcj34=cornell.edu@monetdb.org on behalf of
martin@monetdb.org> wrote:

>Upgrade paths are automatic from the previous feature release, unless we
>have announced that
>a re-create is necessary due to internal changes that can not be handled
>automatically.
>Upgrades from bug-fix releases never require a database re-creation.
>
>Upgrading over multiple feature releases, i.e. a very old dbfarm, is not
>supported.
>A dump and restore is the way to go.
>
>regards, Martin
>
>On 14/10/16 22:27, Lynn Carol Johnson wrote:
>> Hello -
>>
>> My understanding is you should not run a new monetdb version with a
>>dbfarm created from an older version. We have just updated our system
>>from a Jul2015-SP3 version to the latest Jun2016-SP2 version.
>>
>> I have created a new db farm and plan to recreate the tables in the new
>>farm.
>>
>> My question; How do you remove the old dbfarm? Our data is quite
>>large (1.8 T) and I¹d like to retrieve this space for other use. While
>>I can start the db against the new farm, I can find no method of
>>removing the old dbfarm to reclaim this space.
>>
>> Thanks - Lynn
>>
>>
>> _______________________________________________
>> users-list mailing list
>> users-list@monetdb.org
>> https://www.monetdb.org/mailman/listinfo/users-list
>>
>
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