mongodb清理collection中大量数据的2种办法

1 shell中for循环清理

每次去连接一下mongo, 进行数据的remove操作

echo "Begin ..." >> /root/time.log;
echo $(date +%Y-%m-%d-%H:%M:%S) >>/root/time.log;

for((i=1;i<=100000000;i++)); 
do 
        objectid=`/usr/local/mongodb/bin/mongo 127.0.0.1:37017/test -uadmin -padmin --quiet --eval "printjson(db.tickets.findOne({"date":{\\$lt:ISODate(\"2013-01-10T01
:16:33.303Z\")}},{"_id":1}))"`;
         /usr/local/mongodb/bin/mongo 127.0.0.1:37017/test -uadmin -padmin --quiet --eval "db.tickets.remove($objectid)";
         echo " done " $objectid "  " >> /root/tickets.log
done
echo $(date +%Y-%m-%d-%H:%M:%S) >>/root/time.log;
echo "End ..." >> /root/time.log;
echo " " >> /root/time.log

2 mongo shell中 for循环 清理

只连接一次mongo, 在mongo shell中for循环清理

[root@mongo ~]# more t.sh

echo "Begin ..." >> /root/t.log;
echo $(date +%Y-%m-%d-%H:%M:%S) >>/root/t.log;


/usr/local/mongodb/bin/mongo 127.0.0.1:37017/test -uadmin -padmin t.js;


echo $(date +%Y-%m-%d-%H:%M:%S) >>/root/t.log;
echo "End ..." >> /root/t.log;
echo " " >> /root/t.log
[root@mongo ~]# 
[root@mongo ~]# 
[root@mongo ~]# more t.js
for( var i=1 ; i<=100000000; i++ ) {
        var objectid = db.tickets.findOne({date:{$lt:ISODate("2013-01-10T01:16:33.303Z")}},{_id:1}); 
        db.tickets.remove(objectid);
}


[root@mongo ~]# 

实际测试, 第一种安全保险的多,但是毕竟慢,清理100G的数据 大概要3天,第二种快捷的多(据说有风险,但是我测试没有碰到过),清理100G的数据,用了6个小时.