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Full Discussion: Considered basic but advanced outcome (Custom Backup Solution)
Top Forums Shell Programming and Scripting Considered basic but advanced outcome (Custom Backup Solution) Post 302774643 by coastdweller on Saturday 2nd of March 2013 06:05:39 PM
Old 03-02-2013
Considered basic but advanced outcome (Custom Backup Solution)
Ive a problem that I'm reaching out for help.

Ive written (With bits and pieces) of script that is not running as expected or is having an issue causing processes to spiral out of control.

The script does this:

Unloads a UV database server

Tars up a few folders

Transfers the file to another server

Reloads the UV database

Simple actually but I'm lost in its dysfunction.

Code:
#!/bin/sh
# Unload the UV Database
# Suspend the database
uv -admin -L
# Validate the database
uv -admin -R
#Sync any cached data back to disk
sync
# What is the script backing up exactly
backup_files="/home /etc /u2 /usr/spool/uv /boot /opt"
# Where is it backing up to
dest="/backup"
# Create a daily variable for the archive filename and add the hostname to it
day=$(date +%A)
hostname=$(hostname -s)
# Find which week of the month 1-4 it is.
day_num=$(date +%d)
if (( $day_num <= 7 )); then
        week_file="$hostname-week1.tgz"
elif (( $day_num > 7 && $day_num <= 14 )); then
        week_file="$hostname-week2.tgz"
elif (( $day_num > 14 && $day_num <= 21 )); then
        week_file="$hostname-week3.tgz"
elif (( $day_num > 21 && $day_num < 32 )); then
        week_file="$hostname-week4.tgz"
fi
# Find if the Month is odd or even.
month_num=$(date +%m)
month=$(expr $month_num % 2)
if [ $month -eq 0 ]; then
        month_file="$hostname-month2.tgz"
else
        month_file="$hostname-month1.tgz"
fi
# Create archive filename.
if [ $day_num == 1 ]; then
        archive_file=$month_file
elif [ $day != "Saturday" ]; then
        archive_file="$hostname-$day.tgz"
else
        archive_file=$week_file
fi
# Print start status message.
echo
echo "Backing up $backup_files to $dest/$archive_file"
date
# Backup the files using tar.
tar czf $dest/$archive_file $backup_files
# Print end status message.
echo
echo "Backup finished"
date
# Long listing of files in $dest to check file sizes.
ls -lh $dest/
# Release the Database
uv -admin -U

The result is that it will write to a local server (CIFS) but its performance is so bad it never completes or takes down the server.

//location /backup cifs rw,user=domain/user,password=PASS,uid=1000,gid=1000 0 0

I end up with multiple uvsh processes running at 100 percent, or 50 percent. Yes I'm stumped here, I expect this to be simple but its not acting right.
 

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LEARN ABOUT REDHAT

checkbashisms

CHECKBASHISMS(1)					      General Commands Manual						  CHECKBASHISMS(1)

NAME

       checkbashisms - check for bashisms in /bin/sh scripts

SYNOPSIS

       checkbashisms script ...
       checkbashisms --help|--version

DESCRIPTION

       checkbashisms, based on one of the checks from the lintian system, performs basic checks on /bin/sh shell scripts for the possible presence
       of bashisms.  It takes the names of the shell scripts on the command line, and outputs warnings if possible bashisms are detected.

       Note that the definition of a bashism in this context roughly equates to "a shell feature that is not required to be supported  by  POSIX";
       this means that some issues flagged may be permitted under optional sections of POSIX, such as XSI or User Portability.

       In  cases  where  POSIX	and  Debian  Policy  disagree, checkbashisms by default allows extensions permitted by Policy but may also provide
       options for stricter checking.

OPTIONS

       --help, -h
	      Show a summary of options.

       --newline, -n
	      Check for "echo -n" usage (non POSIX but required by Debian Policy 10.4.)

       --posix, -p
	      Check for issues which are non POSIX but required to be supported by Debian Policy 10.4 (implies -n).

       --force, -f
	      Force each script to be checked, even if it would normally not be (for instance, it has a bash or non POSIX shell shebang or appears
	      to be a shell wrapper).

       --extra, -x
	      Highlight lines which, whilst they do not contain bashisms, may be useful in determining whether a particular issue is a false posi-
	      tive which may be ignored.  For example, the use of "$BASH_ENV" may be preceded by checking whether "$BASH" is set.

       --version, -v
	      Show version and copyright information.

EXIT VALUES

       The exit value will be 0 if no possible bashisms or other problems were detected.  Otherwise it will be the sum of the following error val-
       ues:

       1      A possible bashism was detected.

       2      A file was skipped for some reason, for example, because it was unreadable or not found.	The warning message will give details.

SEE ALSO

       lintian(1).

AUTHOR

       checkbashisms  was originally written as a shell script by Yann Dirson <dirson@debian.org> and rewritten in Perl with many more features by
       Julian Gilbey <jdg@debian.org>.

DEBIAN
								 Debian Utilities						  CHECKBASHISMS(1)
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