Shell Programming and Scripting

#!/bin/bash

keyspace=$1
bkp_name="bkp-$$"
data_dir="/var/lib/data/"

if [ -z "${keyspace}" ]; then
    echo "Usage export.sh [keyspace]"
    exit 1
fi

echo "Create snapshot named: ${bkp_name}"
nodetool snapshot "${keyspace}" -t "${bkp_name}"

echo "Preparing backup file"
for name in $(find  "${data_dir}/${keyspace}/"*"/snapshots/${bkp_name}" -type f); do
        new=$(echo "$name" | sed -e "s#${data_dir}/##g" -e "s#\([^/]\+\)/\([^-]\+\).\+/snapshots/${bkp_name}/\([^/]\+\)\$#\1/\2/\3#g")
        mkdir -p "${bkp_name}/$(dirname $new)"
        cp "$name" "${bkp_name}/$new"
done

echo "Remove snapshot named: ${bkp_name}"
nodetool clearsnapshot -t "${bkp_name}" "${keyspace}"

echo "Dump keyspace and table creation instruction"
cqlsh -e "desc \"${keyspace}\";" > "${bkp_name}/${keyspace}.sql"

echo "Create tar file: ${keyspace}.tar.gz"
cd "${bkp_name}"
tar -czf "../${keyspace}.tar.gz" .
cd -

echo "Remove temporary files"
rm -rf "${bkp_name}"

#!/bin/bash
echo "arg count = $#"

while [ $# -gt 0 ]
do
    echo $1
    shift
done

#!/bin/bash
echo "arg count = $#"

while [ $# -gt 0 ]
do
    echo $1
    shift
    /path/to/yourscript.sh "$1"
done

#!/bin/bash

/path/to/new.sh  keyspace1 keyspace2  # go on to [ ....  keyspace9999 ]
exit

chmod +x new.sh

#!/bin/bash
echo "arg count = $#"

while [ $# -gt 0 ]
do
    echo $1
    shift
    /abexportcp.sh "$1"
done

#!/bin/bash
echo "arg count = $#"

while [ $# -gt 0 ]
do
    echo $1
    /abexportcp.sh "$1"
    shift # Eliminates an argument, so put it after abexport
done

bkp_name="bkp-$$"
data_dir="/var/lib/data/"
for keyspace
do
  echo do something with "$keyspace"
done

#!/bin/bash

keyspace=$1
bkp_name="bkp-$$"
data_dir="/var/lib/data/"
for keyspace
do
if [ -z "${keyspace}" ]; then
    echo "Usage export.sh [keyspace]"
    exit 1
fi

echo "Create snapshot named: ${bkp_name}"
nodetool snapshot "${keyspace}" -t "${bkp_name}"

echo "Preparing backup file"
for name in $(find  "${data_dir}/${keyspace}/"*"/snapshots/${bkp_name}" -type f); do
        new=$(echo "$name" | sed -e "s#${data_dir}/##g" -e "s#\([^/]\+\)/\([^-]\+\).\+/snapshots/${bkp_name}/\([^/]\+\)\$#\1/\2/\3#g")
        mkdir -p "${bkp_name}/$(dirname $new)"
        cp "$name" "${bkp_name}/$new"
done

echo "Remove snapshot named: ${bkp_name}"
nodetool clearsnapshot -t "${bkp_name}" "${keyspace}"

echo "Dump keyspace and table creation instruction"
cqlsh 172.20.24.21 -e "desc \"${keyspace}\";" > "${bkp_name}/${keyspace}.sql"

echo "Create tar file: ${keyspace}.tar.gz"
cd "${bkp_name}"
tar -czf "../${keyspace}.tar.gz" .
cd -

echo "Remove temporary files"
rm -rf "${bkp_name}"
done

[root]# sh abexportcptest.sh system_traces system
Create snapshot named: bkp-8119
Requested creating snapshot(s) for [system_traces] with snapshot name [bkp-8119]                                                                                                              and options {skipFlush=false}
Snapshot directory: bkp-8119
Preparing backup file
Remove snapshot named: bkp-8119
Requested clearing snapshot(s) for [system_traces] with snapshot name [bkp-8119]
Dump keyspace and table creation instruction
Create tar file: system_traces.tar.gz
/home
Remove temporary files
Create snapshot named: bkp-8119
Requested creating snapshot(s) for [system_traces] with snapshot name [bkp-8119]                                                                                                              and options {skipFlush=false}
Snapshot directory: bkp-8119
Preparing backup file
Remove snapshot named: bkp-8119
Requested clearing snapshot(s) for [system_traces] with snapshot name [bkp-8119]
Dump keyspace and table creation instruction
Create tar file: system_traces.tar.gz
/home
Remove temporary files

if [ -z "${keyspace}" ]; then
    echo "Usage export.sh [keyspace]"
    exit 1
fi

if [ -z "$1" ]; then
    echo "Usage export.sh [keyspace]"
    exit 1
fi
for keyspace
do
...