Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Regarding Multi-Threading
Top Forums Programming Regarding Multi-Threading Post 78064 by mbb on Friday 15th of July 2005 05:31:03 AM
Old 07-15-2005
Some more info might help, like which database are you using? e.g. Informix, Oracle, SqlServer etc.

One thing is for sure - if you have a database table it will be quicker to load to if the table did not have any indicies. Usually it is better to drop the indicies, load, then re-create the indicies afterwards.

Other things to consider are referential integrity checks made by the database and constraint checks.

After such a large load, you may have to update statistical information on the table to allow the database optimizer to use the table in the optimal way e.g. 'update statistics for table' in Informix.

Disabling transaction logging on the table or database may increase the performance.

Also some database products have data loader applications to allow for high performance bulk loading of a database.

Ultimately, a large data file will take some time and you will always be bound by the performance of your physical devices.

Hope this helps

MBB
 

10 More Discussions You Might Find Interesting

1. Programming

Multi threading using posix thread library

hi all, can anyone tell me some good site for the mutithreading tutorials, its application, and some code examples. -sushil (2 Replies)
Discussion started by: shushilmore
2 Replies

2. Programming

Multi-threading questions

I've been doing some reading lately about threading (Posix threads) and I'm really curious about a couple things that I've read. I'm not sure if many people here have threading experience, but I thought it would be nice to be able to discuss some questions about it. (For the record, I did... (1 Reply)
Discussion started by: DreamWarrior
1 Replies

3. Programming

Multi threading using fork

Hi, I have written a code which will run a set of process using fork. I want to know from You how can i start another job when one of my job in my loop is completed My code is #include<stdio.h> #include<ctype.h> main() { int pid,cid; ChildProcess(); ... (1 Reply)
Discussion started by: sureshraju_ma
1 Replies

4. Programming

Multi threading?

I am not sure if multi threading is the correct term, but here is what I am trying to do. I have a while loop that displays the number 1, pauses, displays the number 2, pauses , displays the number 3 ad infinitum. It just keeps counting. While the screen displays the sequence of numbers counting... (4 Replies)
Discussion started by: enuenu
4 Replies

5. Programming

Multi-threading-- calling same function through different threads

Sir, Can I call same function in the start routines of different Threads. I have created two different threads....and wanna call same function from both threads....is it possible??? Also can I fork inside a thread??? (1 Reply)
Discussion started by: arunchaudhary19
1 Replies

6. Programming

Multi-threading

Hi, If we create 10 threads to invoke runQuery method at same time, Will queryProcessor will be overriden sometime or 10 different copies will be created? We are not using any sunchronzation mechnism in runQuery(). so there is not gurantee on QueryProcessor class variables right OR each 10... (1 Reply)
Discussion started by: jramesh1
1 Replies

7. Programming

Multi-threading

In this piece i implemented the gossip method. The first thread is invoked from inside the (msg is first sent from node -1 to 0 from main()) and the other threads are invoked from inside of the thread function itself. I used two mutexes and a condition variable to control the synchronization. ... (4 Replies)
Discussion started by: saman_glorious
4 Replies

8. UNIX for Dummies Questions & Answers

Confusion over Multi Threading

Hi, I am trying to get my head round Multi Threading and I have a few queries to try and clear up my confusion Q1. Is multi threading a hardware / chip level concept, an OS level or an application level concept ? I am trying to work out where SMT architecture fits in. Q2. What's the multi... (3 Replies)
Discussion started by: jimthompson
3 Replies

9. UNIX for Beginners Questions & Answers

Does UNIX support multi-Threading ?

Not just background process running ... but im looking if unix has any multi-threading concept like in Java, C# ... if not present, can you pls share the nearest feature in unix that is close to multi-threaded concept (3 Replies)
Discussion started by: i4ismail
3 Replies

10. UNIX for Beginners Questions & Answers

Multi threading in UNIX

Hi, Can we apply multi threading in Unix. I am using bash shell. We have a generic script to load the data to table based on file input. For each file there is an individual table to load. For each file found in directory I want to load the data in parallel to target table using ... (3 Replies)
Discussion started by: vedanta
3 Replies

LEARN ABOUT DEBIAN

datacopy

datacopy(1)							 FreeTDS Utilities						       datacopy(1)

NAME

       datacopy - move table data between two servers

SYNOPSIS

       datacopy { -t | -a | -c owner } [-b batchsize] [-p packetsize] [-v] [-d]
		[-S server/username/password/database/table_or_view]
		[-D server/username/password/database/table]

DESCRIPTION

       datacopy is a utility distributed with FreeTDS.	datacopy will move table data from one server to another without the need for intermediate
       files. datacopy is much faster and more efficient than is freebcp out/in.

       datacopy makes use of the db-lib bcp API built into FreeTDS. This API is also available to application developers.

       datacopy can be used to migrate data between Sybase ASE and SQL Server or vice versa.

OPTIONS

       -t     Truncate target table before loading data.

       -a     Append data to target table.

       -c owner
	      Create the target table with the same schema as the source table. datacopy will submit  a  'create  table'  command  on  the  target
	      server/database using the specified owner in

	      the command, e.g. CREATE TABLE owner.table (...).

       -b batchsize
	      The number of rows per batch of data copied.  Each batch of data is effectively 'committed' to the database. The default is 1000.

       -p packetsize
	      The number of bytes, per network packet, sent to and from the servers. Increased packet size can enhance performance.

       -v     Produce verbose output, including diagnostic timings.

       -d     Produce freetds TDSDUMP output. (Serious debug only!)

       -S server/username/password/database/table_or_view
	      The connection information for the source server and the location/name of the table (or view) to be copied.  If not specified, data-
	      copy will prompt the user for the information.

       -D server/username/password/database/table
	      The connection information for the destination server and the location/name of the target table.	If not	specified,  datacopy  will
	      prompt the user for the information.

SEE ALSO

       freebcp(1), defncopy(1), bsqldb(1), tsql(1), FreeTDS User Guide.

HISTORY

       datacopy first appeared in FreeTDS 0.64.

AUTHORS

       The datacopy utility was written by Bill Thompson (thompbil@exchange.uk.ml.com).

doc								 13 November 2011						       datacopy(1)
All times are GMT -4. The time now is 10:11 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy