Trouble migrating from Zope 2.5.x to Zope 2.9.x
Hello Fellow Zopers, I'm trying to migrate an older Zope installation (2.5.x) to Zope 2.9 and I'm having some trouble. I can mount the old ZODB in the new installation -- it shows up under the database control panel with the correct size (4.4M) -- but it appears to be empty. By "empty", I mean there are no folders or objects present when I view the mount point using the ZMI, and I get "Resource Not Found" errors when trying to view object I know to be there. I'm not getting any error messages within the ZMI or in the events.log file regarding problems with the older Data.fs file or mounting it. I'm wondering if there's some sort of "upgrading" of the ZODB file I need to perform? Any help with this would be MOST appreciated, as I'm not turning up anything in the docs, with google, or any other means I can think of, and I need to get this site migrated. Just for completeness: The only thing different about the new Zope installation is that the old Data.fs file is being mounted within Zope under a subdirectory (e.g., "/sitename") instead of the root directory (i.e., "/"). There's a new ZODB mounted at the root directory, and several other new ZODBs mounted in other subdirectories for new sites -- they all work fine but also were created using Zope 2.9, not Zope 2.5. Thanks! Doug
Doug Morse, on 2007-08-09:
Hello Fellow Zopers,
I'm trying to migrate an older Zope installation (2.5.x) to Zope 2.9 and I'm having some trouble. I can mount the old ZODB in the new installation -- it shows up under the database control panel with the correct size (4.4M) -- but it appears to be empty. By "empty", I mean there are no folders or objects present when I view the mount point using the ZMI, and I get "Resource Not Found" errors when trying to view object I know to be there. I'm not getting any error messages within the ZMI or in the events.log file regarding problems with the older Data.fs file or mounting it.
A 4.4 MB Data.fs *is* rather empty. That is only marginally bigger than the size you get when you start with a fresh zope instance. Are you sure the objects you expect are actually there when you start a 2.5 Zope with this database?
I'm wondering if there's some sort of "upgrading" of the ZODB file I need to perform? Any help with this would be MOST appreciated, as I'm not turning up anything in the docs, with google, or any other means I can think of, and I need to get this site migrated.
Not sure, but you might need to first upgrade to 2.6, then 2.7, then 2.8, then 2.9. At least I would not be surprised if that is the case.
Just for completeness: The only thing different about the new Zope installation is that the old Data.fs file is being mounted within Zope under a subdirectory (e.g., "/sitename") instead of the root directory (i.e., "/"). There's a new ZODB mounted at the root directory, and several other new ZODBs mounted in other subdirectories for new sites -- they all work fine but also were created using Zope 2.9, not Zope 2.5.
I would first migrate the 2.5 database to 2.9 in a separate zope instance with only this database, not any others. After that you can try mounting that migrated database together with the others. This is just a guess though: I have never tried anything like this. -- Maurits van Rees | http://maurits.vanrees.org/ [NL] Work | http://zestsoftware.nl/ "Do not worry about your difficulties in computers, I can assure you mine are still greater."
Hi Maurits, Thanks for the speedy reply! Hmmm... you make a good point about the ZODB file size. At installation, though, there was a notable difference. The new, default Data.fs was 2.9MB, whereas the mounted, older Data.fs (renamed, of course) was/is 4.4MB. I like your suggestion re: just upgrading though each minor release number. If someone doesn't suggest an alternative, speedier route, then I'll do as you suggest. Thanks! Doug On Thu, Aug 09, 2007 at 08:49:07AM +0000, Maurits van Rees wrote:
Doug Morse, on 2007-08-09:
Hello Fellow Zopers,
I'm trying to migrate an older Zope installation (2.5.x) to Zope 2.9 and I'm having some trouble. I can mount the old ZODB in the new installation -- it shows up under the database control panel with the correct size (4.4M) -- but it appears to be empty. By "empty", I mean there are no folders or objects present when I view the mount point using the ZMI, and I get "Resource Not Found" errors when trying to view object I know to be there. I'm not getting any error messages within the ZMI or in the events.log file regarding problems with the older Data.fs file or mounting it.
A 4.4 MB Data.fs *is* rather empty. That is only marginally bigger than the size you get when you start with a fresh zope instance. Are you sure the objects you expect are actually there when you start a 2.5 Zope with this database?
I'm wondering if there's some sort of "upgrading" of the ZODB file I need to perform? Any help with this would be MOST appreciated, as I'm not turning up anything in the docs, with google, or any other means I can think of, and I need to get this site migrated.
Not sure, but you might need to first upgrade to 2.6, then 2.7, then 2.8, then 2.9. At least I would not be surprised if that is the case.
Just for completeness: The only thing different about the new Zope installation is that the old Data.fs file is being mounted within Zope under a subdirectory (e.g., "/sitename") instead of the root directory (i.e., "/"). There's a new ZODB mounted at the root directory, and several other new ZODBs mounted in other subdirectories for new sites -- they all work fine but also were created using Zope 2.9, not Zope 2.5.
I would first migrate the 2.5 database to 2.9 in a separate zope instance with only this database, not any others. After that you can try mounting that migrated database together with the others. This is just a guess though: I have never tried anything like this.
----- Original Message ----- From: "Doug Morse" <morse@edoug.org> To: "Maurits van Rees" <m.van.rees@zestsoftware.nl> Cc: <zope@zope.org> Sent: Thursday, August 09, 2007 9:18 AM Subject: Re: [Zope] Re: Trouble migrating from Zope 2.5.x to Zope 2.9.x
Hi Maurits,
Thanks for the speedy reply!
Hmmm... you make a good point about the ZODB file size. At installation, though, there was a notable difference. The new, default Data.fs was 2.9MB, whereas the mounted, older Data.fs (renamed, of course) was/is 4.4MB.
I like your suggestion re: just upgrading though each minor release number. If someone doesn't suggest an alternative, speedier route, then I'll do as you suggest.
I would try the following: 1) Create a new, clean 2.9.x installation 2) Copy the Data.fs file (your 2.5.x version) And see if it works. It could be that your non-root installation is messing things up. If you have any ZCatalogs you will need to fix up the indexes (see the READMEs, there was some change in 2.6? 2.8? that requires a utility to update the indexes). Jonathan
Hi Jonathan, Ah, great point -- I hadn't thought about that re: mounting the old Data.fs root vs. non-root. I'll give that a try right away -- that could be a quick and simple fix. Great thinking! One thing I can say right off is that this difference (i.e., root-mounted vs. non-root-mounted) did *not* matter when migrating from one Zope 2.9 installation to another Zope 2.9 installation. That was something I've had to do along the way here and worked without a hitch. Let's see what happen, though. I'll try it later today and report back. Thanks again! Doug On Thu, Aug 09, 2007 at 09:25:35AM -0400, Jonathan wrote:
----- Original Message ----- From: "Doug Morse" <morse@edoug.org> To: "Maurits van Rees" <m.van.rees@zestsoftware.nl> Cc: <zope@zope.org> Sent: Thursday, August 09, 2007 9:18 AM Subject: Re: [Zope] Re: Trouble migrating from Zope 2.5.x to Zope 2.9.x
Hi Maurits,
Thanks for the speedy reply!
Hmmm... you make a good point about the ZODB file size. At installation, though, there was a notable difference. The new, default Data.fs was 2.9MB, whereas the mounted, older Data.fs (renamed, of course) was/is 4.4MB.
I like your suggestion re: just upgrading though each minor release number. If someone doesn't suggest an alternative, speedier route, then I'll do as you suggest.
I would try the following:
1) Create a new, clean 2.9.x installation 2) Copy the Data.fs file (your 2.5.x version)
And see if it works. It could be that your non-root installation is messing things up. If you have any ZCatalogs you will need to fix up the indexes (see the READMEs, there was some change in 2.6? 2.8? that requires a utility to update the indexes).
Jonathan
participants (3)
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Doug Morse -
Jonathan -
Maurits van Rees