东莞市网站建设平台,wordpress用户登录显示请求失败,做网站的公司怎么赚钱吗,公司企业网站建设教程一、场景描述公司某工程师执行db.giveget_card.drop()#xff0c;误将线上表删除。幸好每天都有做备份#xff0c;这个时候就体现了备份的重要性了#xff0c;哈哈哈。。。二、模拟故障过程备份数据大小#xff1a;rs_test01:PRIMARY use ycsb
switched to db ycsb
rs_… 一、场景描述 公司某工程师执行db.giveget_card.drop()误将线上表删除。 幸好每天都有做备份这个时候就体现了备份的重要性了哈哈哈。。。二、模拟故障过程备份数据大小rs_test01:PRIMARY use ycsb
switched to db ycsb
rs_test01:PRIMARY db.giveget_card.count();
3173391删除之前此表有更新。rs_test01:PRIMARY db.giveget_card.insert({id:1});
WriteResult({ nInserted : 1 })
rs_test01:PRIMARY db.giveget_card.insert({id:2});
WriteResult({ nInserted : 1 })
rs_test01:PRIMARY db.giveget_card.insert({id:3});
WriteResult({ nInserted : 1 })
rs_test01:PRIMARY db.giveget_card.insert({id:4});
WriteResult({ nInserted : 1 })其他表也有更新操作。rs_test01:PRIMARY db.tab.find();
{ _id : ObjectId(59354ba202d9a99ab2f879c6), name : a }
{ _id : ObjectId(59354ba602d9a99ab2f879c7), name : b }
{ _id : ObjectId(59354ba802d9a99ab2f879c8), name : c }
{ _id : ObjectId(59354baa02d9a99ab2f879c9), name : d }删除操作之后此表和其他表都有更新。rs_test01:PRIMARY db.giveget_card.find();
{ _id : ObjectId(59354c28d905432aeaccd53c), id : 5 }
{ _id : ObjectId(59354c2bd905432aeaccd53d), id : 6 }
rs_test01:PRIMARY db.tab.find();
{ _id : ObjectId(59354ba202d9a99ab2f879c6), name : a }
{ _id : ObjectId(59354ba602d9a99ab2f879c7), name : b }
{ _id : ObjectId(59354ba802d9a99ab2f879c8), name : c }
{ _id : ObjectId(59354baa02d9a99ab2f879c9), name : d }
{ _id : ObjectId(59354ccfd905432aeaccd542), name : e }
{ _id : ObjectId(59354cd2d905432aeaccd543), name : f }三、恢复步骤1、将备份中 tab 表的 giveget_card.bson 及 giveget_card.metadata.json 文件拷贝到 /tmp/restore/ycsb 目录自建目录)ycsb 为库名。# cp /data/backup/rs07/ycsb/giveget_card.* /tmp/restore/ycsb2、将备份时间之后误删操作之前的 oplog 导出用于恢复表# mongodump --port 2203 -d local -c oplog.rs -q {ts : {$gte : Timestamp(1496664480, 10430), $lte : Timestamp(1496665113, 10430)}} -o /tmp/oplog--时间戳 是使用转换工具转换之后的结果。3、使用 bsondump 查看 oplog 日志找到 drop 操作的时间戳 1496665069# bsondump /tmp/oplog/local/oplog.rs.bson
{ts:{$timestamp:{t:1496664760,i:1}},t:{$numberLong:12},h:{$numberLong:7079172056815894727},v:2,op:i,ns:ycsb.giveget_card,o:{_id:{$oid:59354ab8c5308d8c7a9da8b5},id:1.0}}
{ts:{$timestamp:{t:1496664762,i:1}},t:{$numberLong:12},h:{$numberLong:-1797107728294067016},v:2,op:i,ns:ycsb.giveget_card,o:{_id:{$oid:59354abac5308d8c7a9da8b6},id:2.0}}
{ts:{$timestamp:{t:1496664765,i:1}},t:{$numberLong:12},h:{$numberLong:8604646791509150392},v:2,op:i,ns:ycsb.giveget_card,o:{_id:{$oid:59354abdc5308d8c7a9da8b7},id:3.0}}
{ts:{$timestamp:{t:1496664768,i:1}},t:{$numberLong:12},h:{$numberLong:9018614066505371436},v:2,op:i,ns:ycsb.giveget_card,o:{_id:{$oid:59354ac0c5308d8c7a9da8b8},id:4.0}}
{ts:{$timestamp:{t:1496664994,i:1}},t:{$numberLong:12},h:{$numberLong:-4471524661347063602},v:2,op:c,ns:ycsb.$cmd,o:{create:tab}}
{ts:{$timestamp:{t:1496664994,i:2}},t:{$numberLong:12},h:{$numberLong:-4215905958456607246},v:2,op:i,ns:ycsb.tab,o:{_id:{$oid:59354ba202d9a99ab2f879c6},name:a}}
{ts:{$timestamp:{t:1496664998,i:1}},t:{$numberLong:12},h:{$numberLong:6170506962401844481},v:2,op:i,ns:ycsb.tab,o:{_id:{$oid:59354ba602d9a99ab2f879c7},name:b}}
{ts:{$timestamp:{t:1496665000,i:1}},t:{$numberLong:12},h:{$numberLong:-8071456063660489895},v:2,op:i,ns:ycsb.tab,o:{_id:{$oid:59354ba802d9a99ab2f879c8},name:c}}
{ts:{$timestamp:{t:1496665002,i:1}},t:{$numberLong:12},h:{$numberLong:4387884836668659146},v:2,op:i,ns:ycsb.tab,o:{_id:{$oid:59354baa02d9a99ab2f879c9},name:d}}
{ts:{$timestamp:{t:1496665069,i:1}},t:{$numberLong:12},h:{$numberLong:-6913449254950935781},v:2,op:c,ns:ycsb.$cmd,o:{drop:giveget_card}}
2017-06-05T20:27:25.5520800 10 objects found4、将 oplog 的 bson 文件拷贝到相应目录下# cp /tmp/oplog/local/oplog.rs.bson /tmp/restore/oplog.bson此时恢复的目录结构# pwd
/tmp/restore
# ls
oplog.bson ycsb 5、至此所有的准备操作已经做完恢复数据。[rootops-db-test02 restore]# mongorestore --port 2203 --oplogReplay --oplogLimit1496665069:1 /tmp/restore
2017-06-05T20:36:45.3610800 building a list of dbs and collections to restore from /tmp/restore dir
2017-06-05T20:36:45.3640800 reading metadata for ycsb.giveget_card from /tmp/restore/ycsb/giveget_card.metadata.json
2017-06-05T20:36:45.3640800 restoring ycsb.giveget_card from /tmp/restore/ycsb/giveget_card.bson
2017-06-05T20:36:48.3620800 [........................] ycsb.giveget_card 15.4MB/475MB (3.2%)
2017-06-05T20:36:51.3620800 [#.......................] ycsb.giveget_card 31.1MB/475MB (6.6%)
2017-06-05T20:36:54.3620800 [##......................] ycsb.giveget_card 46.6MB/475MB (9.8%)
2017-06-05T20:36:57.3620800 [###.....................] ycsb.giveget_card 62.1MB/475MB (13.1%)
2017-06-05T20:37:00.3620800 [###.....................] ycsb.giveget_card 76.4MB/475MB (16.1%)
2017-06-05T20:37:03.3620800 [####....................] ycsb.giveget_card 90.7MB/475MB (19.1%)
2017-06-05T20:37:06.3620800 [#####...................] ycsb.giveget_card 105MB/475MB (22.0%)
2017-06-05T20:37:09.3620800 [######..................] ycsb.giveget_card 120MB/475MB (25.2%)
2017-06-05T20:37:12.3620800 [######..................] ycsb.giveget_card 133MB/475MB (28.0%)
2017-06-05T20:37:15.3620800 [#######.................] ycsb.giveget_card 146MB/475MB (30.8%)
2017-06-05T20:37:18.3630800 [########................] ycsb.giveget_card 163MB/475MB (34.3%)
2017-06-05T20:37:21.3620800 [########................] ycsb.giveget_card 178MB/475MB (37.4%)
2017-06-05T20:37:24.3620800 [#########...............] ycsb.giveget_card 196MB/475MB (41.3%)
2017-06-05T20:37:27.3620800 [##########..............] ycsb.giveget_card 214MB/475MB (45.0%)
2017-06-05T20:37:30.3620800 [###########.............] ycsb.giveget_card 231MB/475MB (48.6%)
2017-06-05T20:37:33.3620800 [############............] ycsb.giveget_card 245MB/475MB (51.5%)
2017-06-05T20:37:36.3620800 [#############...........] ycsb.giveget_card 261MB/475MB (54.8%)
2017-06-05T20:37:39.3620800 [##############..........] ycsb.giveget_card 279MB/475MB (58.7%)
2017-06-05T20:37:42.3620800 [###############.........] ycsb.giveget_card 297MB/475MB (62.5%)
2017-06-05T20:37:45.3620800 [###############.........] ycsb.giveget_card 312MB/475MB (65.8%)
2017-06-05T20:37:48.3620800 [################........] ycsb.giveget_card 328MB/475MB (69.0%)
2017-06-05T20:37:51.3620800 [#################.......] ycsb.giveget_card 341MB/475MB (71.8%)
2017-06-05T20:37:54.3620800 [#################.......] ycsb.giveget_card 356MB/475MB (74.9%)
2017-06-05T20:37:57.3620800 [##################......] ycsb.giveget_card 373MB/475MB (78.5%)
2017-06-05T20:38:00.3620800 [###################.....] ycsb.giveget_card 388MB/475MB (81.7%)
2017-06-05T20:38:03.3620800 [####################....] ycsb.giveget_card 405MB/475MB (85.2%)
2017-06-05T20:38:06.3620800 [#####################...] ycsb.giveget_card 419MB/475MB (88.2%)
2017-06-05T20:38:09.3620800 [#####################...] ycsb.giveget_card 434MB/475MB (91.4%)
2017-06-05T20:38:12.3620800 [######################..] ycsb.giveget_card 442MB/475MB (93.1%)
2017-06-05T20:38:15.3620800 [#######################.] ycsb.giveget_card 459MB/475MB (96.6%)
2017-06-05T20:38:18.3620800 [#######################.] ycsb.giveget_card 475MB/475MB (99.9%)
2017-06-05T20:38:18.4270800 [########################] ycsb.giveget_card 475MB/475MB (100.0%)
2017-06-05T20:38:18.4270800 restoring indexes for collection ycsb.giveget_card from metadata
2017-06-05T20:38:44.6800800 finished restoring ycsb.giveget_card (3173391 documents)
2017-06-05T20:38:44.6800800 replaying oplog
2017-06-05T20:38:44.7390800 done6、查看恢复的结果rs_test01:PRIMARY db.giveget_card.find({id : {$gte : 1 }});
{ _id : ObjectId(59354cb9d905432aeaccd540), id : 5 }
{ _id : ObjectId(59354cc0d905432aeaccd541), id : 6 }
{ _id : ObjectId(59354ab8c5308d8c7a9da8b5), id : 1 }
{ _id : ObjectId(59354abac5308d8c7a9da8b6), id : 2 }
{ _id : ObjectId(59354abdc5308d8c7a9da8b7), id : 3 }
{ _id : ObjectId(59354ac0c5308d8c7a9da8b8), id : 4 }数据内容相同但存储顺序与之前数据的存储顺序不同了。rs_test01:PRIMARY db.giveget_card.count();
3173397结果 count 备份表数据 3173391 之后的更新数据 6 。 7、因为 dump 出来的 oplog 也包含了其他表的操作。查看恢复过程中有没有对其他表产生影响。rs_test01:PRIMARY db.tab.find();
{ _id : ObjectId(59354ba202d9a99ab2f879c6), name : a }
{ _id : ObjectId(59354ba602d9a99ab2f879c7), name : b }
{ _id : ObjectId(59354ba802d9a99ab2f879c8), name : c }
{ _id : ObjectId(59354baa02d9a99ab2f879c9), name : d }
{ _id : ObjectId(59354ccfd905432aeaccd542), name : e }
{ _id : ObjectId(59354cd2d905432aeaccd543), name : f }--查看 tab 表的数据跟原表数据相同没有什么影响说明其他表的日志在空跑。以上就是备份结合 oplog 的恢复操作。备份很重要 备份很重要 备份很重要重要的事情讲三遍 转载于:https://blog.51cto.com/11580138/1932502
