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From "P.C.Sun (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JCR-3333) The binary file entities are stored twice in the DB
Date Mon, 11 Jun 2012 04:32:42 GMT
P.C.Sun created JCR-3333:

             Summary: The binary file entities are stored twice in the DB
                 Key: JCR-3333
                 URL: https://issues.apache.org/jira/browse/JCR-3333
             Project: Jackrabbit Content Repository
          Issue Type: Bug
          Components: JCR 2.0
         Environment: Windows 7, Linux
            Reporter: P.C.Sun

We are using JCR in Liferay to store documents, which means all documents store in DB in binary.
As these days, we found the size of DB is increasing very fast. So we run the SQL to get size
of documents. The SQLs are like: 

1. select sum(size_) from dlfileentry(liferay table to store file meta data, such as name,
size); -> All documents size recorded in dlentry table:

The result is: 43330765874, which means around 40.36 GB

2. The DB size report is: around 95.97 GB. 

3. Within these tables, there are two very big tables: 

j_pm_liferay_binval -> 52.07GB
j_v_pm_binval -> 43.65 GB

So the question is: if the document itself is only around 40.36 GB, what are those two tables
storing? From the table itself, they are the all binval tables...Does it mean every document
is stored twice or something. What's inside those tables? 

In this case, the DB increase around 30 GB within 3 months, really fast, any suggestion to
improve this? 

As replied from Liferay: the table j_v_pm_binaval is to store the file version. However, for
the new document, it's also stored, which we think it should be created only when a new version
is generated. They also mentioned to solve this we need to change repository.xml, however,
we don't have the answer how to deal with the old files, whether they will get lost if we
change the config file.

Please let me know whether it is possible to clean them in DB? 

Thank you very much and looking forwards to your reply. 

Best Regards.


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