安装 wt 工具

wget http://source.wiredtiger.com/releases/wiredtiger-3.0.0.tar.bz2

tar xvf wiredtiger-3.0.0.tar.bz2

cd wiredtiger-3.0.0

sudo yum install snappy-devel -y

./configure --enable-snappy

make

修复 wt 文件

将要修复的mongo的 存储目录整个复制一份到 data ,这里比如我要恢复 collection-242-696896999396352821.wt 文件 ,命令如下

./wt -v -h ../data -C "extensions=[./ext/compressors/snappy/.libs/libwiredtiger_snappy.so]" -R dump -f ../collection.dump collection-242-696896999396352821.wt

output:

collection-242-696896999396352821.wt 3507261

修复好的数据在 …/collection.dump 中,需要导出,注意这里的文件没有 wt 后缀

./wt -v -h ../data -C "extensions=[./ext/compressors/snappy/.libs/libwiredtiger_snappy.so]" -R dump -f ../collection.dump collection-242-696896999396352821

数据恢复

  1. 新建一个库
use testdb

db.back.insert({test: 1})

db.back.remove({})

db.back.stats()

collection-15–558436840631144017
# 找到 back 集合 的文件是 collection-15–558436840631144017
  1. 将新mongo服务关闭,不然会占用 collection-15–558436840631144017.wt
    将之前的 collection.dump load 到 testdb 的 collection-15–558436840631144017 ,注意这里的 …/…/data/mongodb/data 是新库的存储地址
./wt -v -h ../../data/mongodb/data -C "extensions=[./ext/compressors/snappy/.libs/libwiredtiger_snappy.so]" -R load -f ../collection.dump -r collection-15–558436840631144017

输出如下:
collection-15–558436840631144017 :3507261
  1. 再去新mongo 查看
db.back.count()
0

db.repairDatabase()

再去新mongo 查看 db.back.count()
3507261

完成恢复