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需求:
每天定时清除mongodb中某一天之前的数据
思路:
采用shell脚本调用mongodb的命令执行js脚本即可。
步骤:
1.编写email.js文件,作用:清除mongodb某天之前数据,具体代码如下:
- Date.prototype.format = function(format)
- {
- var o =
- {
- "M+" : this.getMonth()+1, //month
- "d+" : this.getDate(), //day
- "h+" : this.getHours(), //hour
- "m+" : this.getMinutes(), //minute
- "s+" : this.getSeconds(), //second
- "q+" : Math.floor((this.getMonth()+3)/3), //quarter
- "S" : this.getMilliseconds() //millisecond
- }
- if(/(y+)/.test(format))
- format=format.replace(RegExp.$1,(this.getFullYear()+"").substr(4 - RegExp.$1.length));
- for(var k in o)
- if(new RegExp("("+ k +")").test(format))
- format = format.replace(RegExp.$1,RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length));
- return format;
- }
- function getDay(day){
- var today = new Date();
- var targetday_milliseconds=today.getTime() + 1000*60*60*24*day;
- today.setTime(targetday_milliseconds); //注意,这行是关键代码
- var tYear = today.getFullYear();
- var tMonth = today.getMonth();
- var tDate = today.getDate();
- tMonth = doHandleMonth(tMonth + 1);
- tDate = doHandleMonth(tDate);
- return tYear+"-"+tMonth+"-"+tDate+" 00:00:00";
- }
- function doHandleMonth(month){
- var m = month;
- if(month.toString().length == 1){
- m = "0" + month;
- }
- return m;
- }
- var myDate = new Date();
- var datetime = myDate.format("yyyy-MM-dd 00:00:00");
- var pre7day = getDay(-7);
- print("today="+datetime+"deleteday="+pre7day);
- datetime= new Date(datetime);
- pre7day= new Date(pre7day);
- var count=db.Mail.find({'updateTime':{'$lt':pre7day}}).count();
- print("count="+count);
- db.Mail.remove({'updateTime':{'$lt':pre7day}});
- print('前7天邮件清理完毕...');
- exit
2. 编写shell脚本mongo_clean.sh代码如下:
- #!/bin/bash
- #清空mongodb中的前7天邮件: guoxin.ai@renren-inc.com
- /data/web/mongodb/mongodb-linux-x86_64-2.4.5/bin/mongo 10.3.18.80:27017/mail -quiet /data/web/email.js
3.加入crontab中:
10 0 * * * sh /data/web/agx/mongo_clean.sh
即完成shell操作mongodb执行定时任务,根据任务不同,修改对应的js文件。
参考文章:http://blog.csdn.net/alen1985/article/details/12712111
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