Re: BLOBs - Mailing list pgsql-novice
From | Chad Thompson |
---|---|
Subject | Re: BLOBs |
Date | |
Msg-id | 030601c24545$722989a0$32021aac@chad Whole thread Raw |
In response to | Re: BLOBs ("Aurangzeb M. Agha" <aagha@bigfoot.com>) |
Responses |
Re: BLOBs
|
List | pgsql-novice |
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 > >
pgsql-novice by date: