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Shell Programming and Scripting
Avoid locking between two files:
Post 302862069 by gnnsprapa on Thursday 10th of October 2013 06:00:03 AM
10-10-2013
Avoid locking between two files:
Hi frnz,
I have requirement as follows..
There are two Modules say A and B...n both have few set of files..we have one script which read these files and load into database(vertica) table..while running script smtimes i encounter an error like one table is getting loaded from A module file also and module B file also..and due to this licking my script fails.
Now A & B run parellely so when A's file getting loaded into table it locks the table and B files fails to load..
so i want to add a piece of code where my script will wait till A file completley load into table and stop the file of B..n once A file loaded it will start loading B file into B..
Overall i need to Develop table update dependency tracking to avoid query failure due to table lock.
I knw its very confusing but if anyone can provide some input , i wud be very grateful..
Thanx
I have requirement as follows..
There are two Modules say A and B...n both have few set of files..we have one script which read these files and load into database(vertica) table..while running script smtimes i encounter an error like one table is getting loaded from A module file also and module B file also..and due to this licking my script fails.
Now A & B run parellely so when A's file getting loaded into table it locks the table and B files fails to load..
so i want to add a piece of code where my script will wait till A file completley load into table and stop the file of B..n once A file loaded it will start loading B file into B..
Overall i need to Develop table update dependency tracking to avoid query failure due to table lock.
I knw its very confusing but if anyone can provide some input , i wud be very grateful..
Thanx
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LEARN ABOUT BSD
mcopy
MCOPY(1) General Commands Manual MCOPY(1) NAME
mcopy - copy MSDOS files to/from Unix SYNOPSIS
mcopy [ -tnvm ] sourcefile targetfile mcopy [ -tnvm ] sourcefile [ sourcefiles... ] targetdirectory DESCRIPTION
Mcopy copies the specified file to the named file, or copies multiple files to the named directory. The source and target can be either MSDOS or Unix files. The use of a drive letter designation on the MSDOS files, 'a:' for example, determines the direction of the transfer. A missing drive des- ignation implies a Unix file whose path starts in the current directory Mcopy will allow the following command line options: t Text file transfer. Mcopy will translate incoming carriage return/line feeds to line feeds. n No warning. Mcopy will not warn the user when overwriting an existing file. v Verbose mode. m Preserve the file modification time. If the target file already exists, and the -n option is not in effect, mcopy asks whether or not to overwrite the file. MSDOS subdirectory names are supported with either the '/' or '' separator. The use of the '' separator or wildcards will require the names to be enclosed in quotes to protect them from the shell. The mcd command may be used to establish the device and the current working directory (relative to MSDOS), otherwise the default is A:/. SEE ALSO
mcd(1), mread(1), mwrite(1) BUGS
Unlike MSDOS, the destination directory may not be omitted. The '+' operator (append) from MSDOS is not supported. No other Mtools command requires the use of a drive letter designation on MSDOS files. local MCOPY(1)