RE: Storing blobs in database vs filesystem

Nial Wrote: My personal preference for files is to store them on filesystems with a pointer to them in the DB (either a BFILE or else just a straight uri for them)

Qs Could you clarify with some Sample EXAMPLE please?

We are also facing a similar issue with our "Banking" Application product where approx 1/3rd of the Database size is taken up by 1 Table which stores the Customer Signatures in one of its LONG/LOB fields.

Database Sizes are in the range of a few Tera Bytes.

The Banking Product is a primarily Pro C Application, with java functions too.

Qs IN OUR BANKING PRODUCT CASE, THE RESPECTIVE SIGNATURE IS VERIFIED AS PART OF AN OLTP TRANSACTION BY A BANK STAFF USER & THEREAFTER A CREDIT/DEBIT OLTP TRANSACTION IS PASSED TO THE RESPECTIVE CUSTOMER'S BANK ACCOUNT. DOES THIS QUALIFY FOR STORAGE AS EXTERNAL DATA? Thanks indeed

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Niall Litchfield Sent: Friday, September 29, 2006 3:47 PM To: dubey.sandeep_at_gmail.com
Cc: ORACLE-L
Subject: Re: Storing blobs in database vs filesystem

On 9/28/06, Sandeep Dubey <dubey.sandeep_at_gmail.com> wrote:

I have a document processing system on Oracle 10.2 Linux. It stores document as blob in the database. We store 1 Million docs a month and current table size is 5 million. Database size is 50 GB out of which blob table takes 35 GB. (It is not partitioned).

<snip>         

	What could be challenge in storing it on file system? Any major
	disadvantage that I should not consider it at all?

	Thanks

Are the BLOB's transactional in anyway, especially are they subject to change? If so then consistent recovery requirements might be overly complicated.

My personal preference for files is to store them on filesystems with a pointer to them in the DB (either a BFILE or else just a straight uri for them)

--

Niall Litchfield
Oracle DBA
http://www.orawin.info

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