[MarkLogic Dev General] Attaching more than one forest to a DB in ML

sini narayanan sini.isonline at gmail.com
Wed May 15 01:44:41 PDT 2013

Hi Jason,

The forest F2 was created only after the initial load. Just to make sure, I
tried the same steps once more and experienced the same issue.
Steps I followed:
1. Created DB
2. Created Forest F1
3. Attached F1 to the DB
4. Created XDBC for the DB
5. Using MLCP, loaded documents into the XDBC port.
6. After complete loading, I created a new Forest F2
7. Attached F2 to the DB.
8. Using xdmp:document-insert, specified the F2 ID and inserted docs.
9. From admin console, dettached F2 from the DB
10. Performed an admin:forest-delete on F2

And now I have only half of the documents in the DB. I dont understand why
this is happening.

And also,
1. If I have two forests attached to a DB, and if I insert a document
without specifying the Forest ID, to which forest will the document get
inserted into?
2. In case of the above mentioned point, how can I identify into which
Forest the document is inserted into?


On Wed, May 15, 2013 at 12:10 PM, Jason Hunter <jhunter at marklogic.com>wrote:

> You're on MarkLogic 6?
> If you really did what you say you did then you wouldn't see that
> behavior.  Which makes me think you didn't do exactly that.  :)
> My guess is you attached F2 to the database before doing the initial load.
>  That means you had a 50/50% split across the two forests after the first
> load, and removing F2 later resulted in you seeing just half your data.
>  But that's just a guess that would explain the result and could be an easy
> mistake in testing to make.
> -jh-
> On May 14, 2013, at 11:24 PM, sini narayanan <sini.isonline at gmail.com>
> wrote:
> > Hi,
> >
> > I have a DB created in ML. And have a Forest(F1) attached to the DB.
> > All the documents published from the source S1 is now in the DB.
> >
> > A new source S2 will also be publishing documents into the same DB.
> > But I donot want these documents in the same forest.
> >
> > I want a new forest (F2) to be created for the same DB and then publish
> documents into this forest,
> > so that in case I need to purge only the S2 documents, I can just delete
> the forest.
> >
> > I have tried the above scenario. The DB already had 26002 documents. I
> created new Forest F2.
> > And then using xdmp:document-insert, I loaded a document into the DB
> specifying the new F2 ID.
> > The document got inserted and now the DB have 26003 documents.
> > After this I detached the forest F2 from the DB and performed an
> admin:forest-delete on F2.
> > After that when I explore, I have only 12953 docs. Why is that so? Am I
> doing something wrong here?
> >
> > Thanks,
> > Sini
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