Sponsored Content
Full Discussion: UNIX Pipe
Top Forums UNIX for Dummies Questions & Answers UNIX Pipe Post 86254 by tmarikle on Wednesday 12th of October 2005 03:56:37 PM
Old 10-12-2005
Quote:
Pipes and fifos cannot overflow.
...
With one process reading from a pipe and another writing to a pipe, they will take turns running.
In fact, this sort of mechanism works very well when having to export Oracle data when the data exceeds 2 GB and the Oracle exp utility doesn't support large filesystems.
Code:
mknod pipefile p
compress < pipefile > exp.dmp.Z &
exp file=pipefile

 

10 More Discussions You Might Find Interesting

1. HP-UX

Compress while wrting to a file using a unix pipe

I would like to know if the following can be done. route output from an sql select directly to a pipe and compress it at the same time. regards Albert (2 Replies)
Discussion started by: booyena1
2 Replies

2. Programming

unix pipe in C

I currently stuck on a simple program that requires unix pipe. I'm have never programmed with unix pipe before, so if anyone can point me to the right different will be greatly appreciated! I'm suppose to write a program that the parent spawns many child processes and each of the child process... (1 Reply)
Discussion started by: meh
1 Replies

3. Shell Programming and Scripting

splitting a pipe delimited file in unix

Could one of you shad some light on this: I need to split the file by determining the record count and than splitting it up into 4 files. Please note, this is not a fixed record length but rather a "|" delimited file. I am not sure as how to handle reminder/offset for the 4th file. For... (4 Replies)
Discussion started by: ddedic
4 Replies

4. UNIX for Dummies Questions & Answers

Definition for the UNIX term Pipe

Looking for examples/definition of what the term Pipe means in UNIX. Please provide answers and illustrations if possible or direction. Thanks!:) (5 Replies)
Discussion started by: dfrost126
5 Replies

5. UNIX for Advanced & Expert Users

unix command pipe

I am pretty new to UNIX. My client has a requirement where in a directory we have some files with somewhat similar name like test_XX.txt, test_XY.txt, test_XZ.txt, test_ZZ.txt, test_ZY.txt, test_ZX.txt, test_YY.txt......Out of these files few files have 0 bytes. Is there a way where we can go... (7 Replies)
Discussion started by: RubinPat
7 Replies

6. Shell Programming and Scripting

Converting hex value 7C (for pipe) to CRLF in Unix

I am trying to convert a txt file that includes one long string of data. The lines are separated with hex value 7C (for pipe). I am trying to process this file using SQR (Peoplesoft) so I thought the easiest thing to do would be to replace the eol char with a CRLF in unix so I can just... (4 Replies)
Discussion started by: sfedak
4 Replies

7. UNIX for Dummies Questions & Answers

Passing struct through unix pipe -solved

EDIT: Nevermind, called a friend who is good at this stuff and he figured it out :D Hi all, So I'm trying to teach myself to write programs for unix in c. I am currently creating a program, and I need to pass a struct through a pipe, but I can't figure out how. The struct I want to pass... (0 Replies)
Discussion started by: twnsfn34
0 Replies

8. Shell Programming and Scripting

Replacing UNIX 1 byte delimiters to the pipe separator

Hi I am new to Unix Shell scripting have a requirement where I have to replace the "unix 1 byte delimiter" with the "pipe" separator and also remove any carriage returns and line feeds if any The Source File 4 QFH Jungle Hill 32-34 City Road London SE23 3UX the output should be ... (3 Replies)
Discussion started by: dJHa
3 Replies

9. Shell Programming and Scripting

UNIX fifo concurrent read from a named pipe

I have created a fifo named pipe in solaris, which writes the content of a file, line by line, into pipe as below: $ mkfifo namepipe $ cat books.txt "how to write unix code" "how to write oracle code" $ cat books.txt >> namepipe & I have a readpipe.sh script which reads the named... (2 Replies)
Discussion started by: naveen mani
2 Replies

10. UNIX for Beginners Questions & Answers

UNIX Pipe -Exit when there are no bytes to read

Hi All, I'm creating a program which reads millions of bytes from the PIPE and do some processing. As the data is more, the idea is to read the pipe parallely. Sun Solaris 8 See the code below: #!/bin/sh MAXTHREAD=30 awk '{print $1}' metadata.csv > nvpipe & while do ... (3 Replies)
Discussion started by: mr_manii
3 Replies
DBIx::Class::Storage::DBI::Oracle::WhereJoins(3)	User Contributed Perl Documentation	  DBIx::Class::Storage::DBI::Oracle::WhereJoins(3)

NAME
DBIx::Class::Storage::DBI::Oracle::WhereJoins - Oracle joins in WHERE syntax support (instead of ANSI). PURPOSE
This module is used with Oracle < 9.0 due to lack of support for standard ANSI join syntax. SYNOPSIS
DBIx::Class should automagically detect Oracle and use this module with no work from you. DESCRIPTION
This class implements Oracle's WhereJoin support. Instead of: SELECT x FROM y JOIN z ON y.id = z.id It will write: SELECT x FROM y, z WHERE y.id = z.id It should properly support left joins, and right joins. Full outer joins are not possible due to the fact that Oracle requires the entire query be written to union the results of a left and right join, and by the time this module is called to create the where query and table definition part of the SQL query, it's already too late. METHODS
See DBIx::Class::SQLMaker::OracleJoins for implementation details. BUGS
Does not support full outer joins. Probably lots more. SEE ALSO
DBIx::Class::SQLMaker DBIx::Class::SQLMaker::OracleJoins DBIx::Class::Storage::DBI::Oracle::Generic DBIx::Class AUTHOR
Justin Wheeler "<jwheeler@datademons.com>" CONTRIBUTORS
David Jack Olrik "<djo@cpan.org>" LICENSE
This module is licensed under the same terms as Perl itself. perl v5.18.2 2013-07-12 DBIx::Class::Storage::DBI::Oracle::WhereJoins(3)
All times are GMT -4. The time now is 06:14 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy