[ZODB-Dev] Copying zodb's with relstorage

[Santi Camps]

On Thu, Feb 10, 2011 at 3:46 PM, Shane Hathaway <shane at hathawaymix.org>wrote:

> On 02/10/2011 07:41 AM, Shane Hathaway wrote:
>
>> On 02/10/2011 06:30 AM, Santi Camps wrote:
>>
>>> I was trying to move a database copy a relstorage zodb and having some
>>> issues.  The original zodb is mounted using a mount point /original_path
>>>    If I restore the backup of the database and mount it using exactly
>>> the same mount point /original_path in the destination zope, all goes
>>> right.   But what I want is to replicate the original database N times,
>>> so need to have /destination_pathN in the mount point.  When I do that,
>>> the database seems empty (no object is shown in the mounted point).
>>>
>>
>> The normal way to copy objects in ZODB is through ZEXP export and
>> import.  Have you tried that?  Also, what is your goal?
>>
>
> Um, I see you mentioned that you're trying to avoid ZEXP.  Ok. ;-)
>
> The question remains: What are you trying to accomplish?
>
>
The objective is to duplicate a storage using different mount points.  For
instance, if we have  Database1 -> mount_point_1 , create Database2 and
Database3 as copies of Database1 (using pg_dump & pg_restore), and then
mount them as mount_point_2 and mount_point_3

It works if I mount Database2 or Database3 with the same mount_point name
(mount_point_1), but when mount point name changes, objects inside are not
seen.  It seems like a problem with some reference to the root object in the
ZODB, but not able to fix it (don't now if it's possible, in fact)

Thanks for your answers

Santi Camps
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