清理mongodb collection中大量数据的二种办法

#!/bin/sh
#
#site: www.jiaochengji.com
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 

[root@mongo ~]# more t.sh 
#!/bin/bash
#
#site: www.jiaochengji.com
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); 
}