Hello,
I have a table in the database that has a BLOB field to store images,
which is usually more than 1MB per record. There are currently near
9000 records in it, which means the table is growing to be huge. Will
this slow the database performance significantly? If so, how to reduce
the image size? Does DB2 provide a way to compress a column data?
Thanks. 2 3116
mjf wrote: I have a table in the database that has a BLOB field to store images, which is usually more than 1MB per record. There are currently near 9000 records in it, which means the table is growing to be huge. Will this slow the database performance significantly? If so, how to reduce the image size? Does DB2 provide a way to compress a column data?
Isn't your image already compressed (e.g. JPEG).
Compressing a compression typically is very ineffective.
You can also use commonly available compression routines and wrap them
in a UDF.
E.g. (first thing I found on Google): http://www.oberhumer.com/opensource/ucl/
Cheers
Serge
--
Serge Rielau
DB2 Solutions Development
IBM Toronto Lab
IOD Conference http://www.ibm.com/software/data/ond...ness/conf2006/
Thanks for the reply and info! The images are NOT already compressed,
and they are bmp files. They are now considering to compress the images
before storing them in DB2.
Serge Rielau wrote: mjf wrote: I have a table in the database that has a BLOB field to store images, which is usually more than 1MB per record. There are currently near 9000 records in it, which means the table is growing to be huge. Will this slow the database performance significantly? If so, how to reduce the image size? Does DB2 provide a way to compress a column data? Isn't your image already compressed (e.g. JPEG). Compressing a compression typically is very ineffective. You can also use commonly available compression routines and wrap them in a UDF. E.g. (first thing I found on Google): http://www.oberhumer.com/opensource/ucl/
Cheers Serge -- Serge Rielau DB2 Solutions Development IBM Toronto Lab
IOD Conference http://www.ibm.com/software/data/ond...ness/conf2006/ This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Corrine |
last post by:
Hi,
I am creating a global temporary table that is session-specific. I
insert a BLOB into this table, and then select the BLOB from this
table into a ResultSet. The ResultSet sees this BLOB object, and I am
able to get the binary input stream from this blob. However, when I
invoke InputStream.read(byte) on this input stream, I get the
following exception:
java.io.IOException: ORA-01410: invalid ROWID
|
by: Vladimir Kanovnik |
last post by:
I have table with columns id(number), photo(blob) and thumbnail(blob). I
would like to insert image (using stored procedure) from file to column
photo and in same time copy reduced image to column thumbnail. My code is:
CREATE OR REPLACE PROCEDURE "MDEMO"."PUT_PHOTO_THUMB"
(
image_file_directory in varchar2,
image_file_name in varchar2,
image_file_mime_type in varchar2,
image_http_path in varchar2,
|
by: Greg |
last post by:
Hello,
I've to manage many 'table' (having same scheme) on the same server.
And I ask myself what could be the best to do (and if you know, why) :
Creating as many database (the name would be a 8byte int value
(converted to a string)) as necessary, all with the same table struct
(and table name), or create 1 database and in it create also as many
table as necessary (so also a 8byte int value as name) ?
|
by: Warren Wright |
last post by:
Hello,
We maintain a 175 million record database table for our customer.
This is an extract of some data collected for them by a third party
vendor, who sends us regular updates to that data (monthly).
The original data for the table came in the form of a single, large
text file, which we imported.
This table contains name and address information on potential
|
by: Stanley Sinclair |
last post by:
(Minor question. Since updating to FP4 I cannot access HTML help.
Compiler error. What's wrong?)
_______________________
Subject of this message:
There is lots of Help regarding getting data out of BLOB and CLOB
storage, but I see little on getting data into it. I know it's there,
but could someone speed my search? A colleague created the following
table:
| |
by: KR |
last post by:
Hi,
One of our third-party software vendors is planning to implement BLOB
in their database for storing certain documents. We are not too
thrilled about it, since it can be a drain on our resources, but I
would like to get the expert opinion out there on the pros and cons of
implementing this.
Also, the database is in Full recovery mode and we back up the
transaction log every 15 minutes. We also do a process similar to log
|
by: Kyle Teague |
last post by:
What would give better performance, serializing a multidimensional array
and storing it in a single entry in a table or storing each element of
the array in a separate table and associating the entries with the entry
in the other table?
Having a separate table would result in two queries instead of one, but
you wouldn't have to deal with the overhead of serializing and
unserializing data.
-- Kyle
|
by: greywire |
last post by:
So I need to load lots of data into my database.
So I discover LOAD DATA INFILE.
Great! This little gem loads my CSV in blazing times (compared to
parsing the file and doing INSERT for each row). Its still slow on
large files, but just barely acceptable.
Only one problem. It truncates fields to 256 characters, even on a
text field.
|
by: eholz1 |
last post by:
Hello Members,
I am setting up a photo website. I have decided to use PHP and MySQL.
I can load jpeg files into the table (medium blob, or even longtext)
and get the image(s) to display without a problem. I am using
chunk_split(data) and the base64_encode and base64_decode on the files.
I do a select from the database, and then echo the image (with
header(Content Type: image/jpeg)
and the decoded image displays fine. Yes, I have...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
| |
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
| |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| |