can't map file memory
处理一次32bit mongdb 数据超过2G问题can't map file memory - mongo requires 64 bit build for larger datasets
生产环境下某32bit windows机器安装了mongodb，一日数据超过2G
然后，任何操作都会报错
{
"assertion" : "can't map file memory - mongo requires 64 bit build for larger datasets",
"assertionCode" : 10084,
"errmsg" : "db assertion failure",
"ok" : 0
}
解决：
1.在windows机器拷贝下物理文件，拷贝到64bit linux机器
2.用原物理文件启动一个mongo实例
/usr/local/mongodb/bin/mongod --dbpath=/data1/mongodb/dataep/ --logpath=/data1/mongodb/logs/mongodbep.log --logappend --fork --port=27010 --rest --profile=1 --slowms=500
3.从新实例备份出需要的数据库
/usr/local/mongodb/bin/mongodump--port 27010 -d ep -o /data1/backup/mongodbep/
4. 将备份文件还原到生产环境下mongodb
/usr/local/mongodb/bin/mongorestore--host 172.21.5.49 --port 21017 -d ep /data1/backup/mongodbep/ep/
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