Phần 8 Backup và Restore trên MongoDB Server
1./ Lý thuyết
Nếu sử dụng MongoDB Atlas thì sẽ được backup, restore trên cloud service
#
Because mongodump and mongorestore operate by interacting with a running mongod instance, they can impact the performance of your running database. Not only do the tools create traffic for a running database instance, they also force the database to read all data through memory. When MongoDB reads infrequently used data, it can evict more frequently accessed data, causing a deterioration in performance for the database's regular workload.
=> việc sử dụng mongodump và mongorestore có thể ảnh hưởng trực tiếp đến hiệu suất của mongodb. Do dữ liệu cũ sẽ được đẩy lên Ram và thay thế các document mới đang được cache và sử dụng nhiều. Ram cũng sẽ bị tốn.
2./ Backup MongoDB
2.1/ Import 1 DB lớn khoảng 30 ngàn bản ghi để test
cd /opt/backup/mongodb
wget https://media.mongodb.org/zips.json
mongoimport --db test3 --collection zips --file zips.json
#Kết quả
2022-02-28T16:20:53.049+0700 connected to: mongodb://localhost/
2022-02-28T16:20:55.310+0700 29353 document(s) imported successfully. 0 document(s) failed to import.
#Kiểm tra lại DB test3 đã có đủ dữ liệu
2.2/ Restore MongoDB
Tiến hành xoá DB test3
rs0:PRIMARY> show dbs
admin 0.000GB
config 0.000GB
local 0.007GB
test 0.000GB
test3 0.002GB
rs0:PRIMARY> db.dropDatabase()
{
"dropped" : "test3",
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1646042298, 2),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
},
"operationTime" : Timestamp(1646042298, 2)
}
rs0:PRIMARY> show dbs
admin 0.000GB
config 0.000GB
local 0.007GB
test 0.000GB
Script Restore DB test3
#!/bin/bash
#/opt/script/restore_mongodb_bson.sh
#create by cuongnh
#2022.02.28
MONGO_DIR=/opt/backup/mongodb/
mkdir -p $MONGO_DIR
now1="$(date +'%Y.%m.%d-%H.%M.%S.%3N')"
DB_NAME=$1
DB_FOLDER=$2
#mongorestore --host=mongodb1.example.net --port=3017 --username=user --authenticationDatabase=admin /opt/backup/mongodump-2013-10-24
#1./Restore MongoDB bson
mongorestore -d $DB_NAME /opt/backup/mongodb/$DB_FOLDER/$DB_NAME
#mongorestore -d test3 -o /opt/backup/mongodb/test3-\[2022.02.28-16.26.53.236\]
echo ""
#Kết quả:
root@svr11:/opt/backup/mongodb# /opt/script/restore_mongodb_bson.sh test3 test3-[2022.02.28-16.26.53.236]
2022-02-28T17:02:25.952+0700 The --db and --collection flags are deprecated for this use-case; please use --nsInclude instead, i.e. with --nsInclude=${DATABASE}.${COLLECTION}
2022-02-28T17:02:25.952+0700 building a list of collections to restore from /opt/backup/mongodb/test3-[2022.02.28-16.26.53.236]/test3 dir
2022-02-28T17:02:25.953+0700 reading metadata for test3.zips from /opt/backup/mongodb/test3-[2022.02.28-16.26.53.236]/test3/zips.metadata.json
2022-02-28T17:02:25.969+0700 restoring test3.zips from /opt/backup/mongodb/test3-[2022.02.28-16.26.53.236]/test3/zips.bson
2022-02-28T17:02:27.779+0700 finished restoring test3.zips (29353 documents, 0 failures)
2022-02-28T17:02:27.780+0700 no indexes to restore for collection test3.zips
2022-02-28T17:02:27.780+0700 29353 document(s) restored successfully. 0 document(s) failed to restore.
Có thể backup và restore với gzip để nén file
https://docs.ovh.com/gb/en/publiccloud/databases/mongodb/backups-and-restores-cli/?xtor=SEC-13-GOO-[ID_INT_OVH_Domain_Undefinite_Traffic_Reach_Srch_Offensive_DomainNameGenericVIETNAM_(Web)()]-[563968396548]-S-[]&xts=563736&sitelink=&gclid=CjwKCAiAgvKQBhBbEiwAaPQw3PtsV2wGq8BuMl-X12pYU-2Mp0s_5tXqMXwH0ZjwwNvwU1lWFO7isBoC8NoQAvD_BwE
