Re: BLOBs

That is exactly what i have been doing to date.  I have always thought that
it would be cool to manage these files (.wav in my case) in a database, w/o
the problem of some user mucking with a directory and screwing up the files.

I believe that i'll give it try.

Thanks for all your responses
Chad
----- Original Message -----
From: "Aurangzeb M. Agha" <aagha@bigfoot.com>
To: "Warwick Hunter" <whunter@agile.tv>
Cc: "Chad Thompson" <chad@weblinkservices.com>; "pgsql-novice"
<pgsql-novice@postgresql.org>
Sent: Thursday, August 15, 2002 10:26 PM
Subject: Re: [NOVICE] BLOBs


> I hope this isn't getting too academic, but why not store the path to
> blobs in the DB and access them in some other fashion?
>
> Rgs,
> Aurangzeb
>
> On Fri, 16 Aug 2002, Warwick Hunter wrote:
>
> :Chad
> :
> :I am using PostgreSQL to store BLOBS. I can't say that the
> :performance I am getting is wonderful, but it is adequate
> :for my purposes for now. Few people are every satisfied
> :with the performance of their database anyway :-)
> :
> :I have done some performance testing on PostgreSQL and have
> :discovered that on an Linux Intel machine with reasonably fast
> :SCSI discs I can get average performance numbers like these:
> :
> :Binary BLOB Size
> :300 KB read=24  ms write=185 ms del=105 ms
> :150 KB read=11  ms write=90  ms del=51  ms
> :   5 KB read=2.5 ms write=14  ms del=11  ms
> :
> :I have done a small amount of tuning of the PostgreSQL
> :configuration. I plan to do some more.
> :
> :> Or is storing BLOBs in a DB a good idea?
> :
> :I have found PostgreSQL to be quite robust. I have a
> :test that deliberately kills the postmaster and postgres
> :subprocesses while doing write operations to see if I
> :can cause the database to be corrupted. This test
> :rarely fails.
> :
> :This test fails more regularly if you rewrite the
> :data of an existing BLOB rather than create a new
> :one and delete the old one. So now I only ever create
> :a new BLOB.
> :
> :I have seen one instance when the power on a machine
> :failed while writing a BLOB caused one BLOB to not
> :be restored correctly when the database came up.
> :I plan to investigate this and report a bug if
> :appropriate.
> :
> :I looked at the bytea data type for storing my objects
> :as regular columns. However I was unable to make it work
> :with the normal SQL statements, the binary data always
> :upset the SQL command and the escaping routines didn't
> :seem to help.
> :
> :Warwick
> :
>
> --
> Aurangzeb M. Agha    | Email : aagha@bigfoot.com
>                      | Home  : +3 010 8959.558
> 34 Nafsika St.       | Direct: +3 010 8995.875
> Voula 16673          | Mobile: TBD
> Greece               | Voice : 415 412 4234 (US Only)
>                      | e-Fax : 978 246.0770
> PGP ID: 0x68B3A763   |
>
> "Those who would give up essential liberty to purchase a little
>  temporary safety deserve neither liberty nor safety."
>
> - Benjamin Franklin
>
>