由于测试环境上面使用的zabbix服务器配置比较低，经常会遇到性能瓶颈（主要是数据库和磁盘I/O等），于是倒逼我使用了一些方式来缓解这些问题。
主要是以前使用的那个备份数据库的脚本是对zabbix数据库进行全备的，使用的又是mysql自带的工具mysqldump，当数据量大了之后进行全备所花的时间比较长，这样将会造成数据库的锁读。。。从而使zabbix服务以为mysql死掉了，产生一大堆的报警。
后来发现原来造成数据库数据量大量增加的是zabbix数据库中的一些存储数据的大表导致的。于是备份数据库的时候可以选择跳过这些表进行备份，这样，将大大减少数据库备份所花的时间（PS：之前备份数据库所花时间在十分钟左右，现在跳过大表备份，所花时间在1S左右就能备份完，大大缩短了备份数据库时间）。
下面就贴出某位大神写的专门为zabbix数据库做备份以及恢复的脚本：
#!/bin/bash
#author: itnihao
red='e[0;31m' # 红色
RED='e[1;31m'
green='e[0;32m' # 绿色
GREEN='e[1;32m'
blue='e[0;34m' # 蓝色
BLUE='e[1;34m'
purple='e[0;35m' # 紫色
PURPLE='e[1;35m'
NC='e[0m' # 没有颜色
source /etc/bashrc
source /etc/profile
MySQL_USER=zabbix
MySQL_PASSWORD=zabbix
MySQL_HOST=localhost
MySQL_PORT=3306
MySQL_DUMP_PATH=/opt/backup
MYSQL_BIN_PATH=/opt/software/mysql/bin/mysql
MYSQL_DUMP_BIN_PATH=/opt/software/mysql/bin/mysqldump
MySQL_DATABASE_NAME=zabbix
DATE=$(date '+%Y%m%d')
MySQLDUMP () {
[ -d ${MySQL_DUMP_PATH} ] || mkdir ${MySQL_DUMP_PATH}
cd ${MySQL_DUMP_PATH}
[ -d logs ] || mkdir logs
[ -d ${DATE} ] || mkdir ${DATE}
cd ${DATE}
#TABLE_NAME_ALL=$(${MYSQL_BIN_PATH} -u${MySQL_USER} -p${MySQL_PASSWORD} -h${MySQL_HOST} ${MySQL_DATABASE_NAME} -e "show tables"|egrep -v "(Tables_in_zabbix)")
TABLE_NAME_ALL=$(${MYSQL_BIN_PATH} -u${MySQL_USER} -p${MySQL_PASSWORD} -h${MySQL_HOST} ${MySQL_DATABASE_NAME} -e "show tables"|egrep -v "(Tables_in_zabbix|history*|trends*|acknowledges|alerts|auditlog|events|service_alarms)")
for TABLE_NAME in ${TABLE_NAME_ALL}
do
${MYSQL_DUMP_BIN_PATH} --opt -u${MySQL_USER} -p${MySQL_PASSWORD} -P${MySQL_PORT} -h${MySQL_HOST} ${MySQL_DATABASE_NAME} ${TABLE_NAME} >${TABLE_NAME}.sql
sleep 0.01
done
[ "$?" == 0 ] && echo "${DATE}: Backup zabbix succeed" >> ${MySQL_DUMP_PATH}/logs/ZabbixMysqlDump.log
[ "$?" != 0 ] && echo "${DATE}: Backup zabbix not succeed" >> ${MySQL_DUMP_PATH}/logs/ZabbixMysqlDump.log
cd ${MySQL_DUMP_PATH}/
rm -rf $(date +%Y%m%d --date='5 days ago')
exit 0
}
MySQLImport () {
cd ${MySQL_DUMP_PATH}
DATE=$(ls ${MySQL_DUMP_PATH} |egrep "b^[0-9]+$b")
echo -e "${green}${DATE}"
echo -e "${blue}what DATE do you want to import,please input date:${NC}"
read SELECT_DATE
if [ -d "${SELECT_DATE}" ];then
echo -e "you select is ${green}${SELECT_DATE}${NC}, do you want to contine,if,input ${red}(yes|y|Y)${NC},else then exit"
read Input
[[ 'yes|y|Y' =~ "${Input}" ]]
status="$?"
if [ "${status}" == "0" ];then
echo "now import SQL....... Please wait......."
else
exit 1
fi
cd ${SELECT_DATE}
for PER_TABEL_SQL in $(ls *.sql)
do
${MYSQL_BIN_PATH} -u${MySQL_USER} -p${MySQL_PASSWORD} -h${MySQL_HOST} ${MySQL_DATABASE_NAME} < ${PER_TABEL_SQL}
echo -e "import ${PER_TABEL_SQL} ${PURPLE}........................${NC}"
done
echo "Finish import SQL,Please check Zabbix database"
else
echo "Don't exist ${SELECT_DATE} DIR"
fi
}
case "$1" in
MySQLDUMP|mysqldump)
MySQLDUMP
;;
MySQLImport|mysqlimport)
MySQLImport
;;
*)
echo "Usage: $0 {(MySQLDUMP|mysqldump) (MySQLImport|mysqlimport)}"
;;
esac
