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skill_tree_mysql
提交 a6c5bbe0 编写于 作者: M Mars Liu
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disaster recovery

上级 769a1eed
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data/2.MySQL中阶/3.聚合和分组/7.WITH ROLLUP/config.json 已删除 100644 → 0
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{
"node_id": "mysql-91829d4938034ce09e99badf23dbebf6",
"keywords": [],
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data/2.MySQL中阶/6. 索引/3.删除索引/drop_index.json
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{ {
"type": "code_options", "type": "code_options",
"author": null, "author": "Mars",
"source": "drop_index.md", "source": "drop_index.md",
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......
data/2.MySQL中阶/8.备份与恢复/2.mysqldumper/config.json 已删除 100644 → 0
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{
"node_id": "mysql-40cf0134521849d891d6135e2316491a",
"keywords": ["mysqldumper"],
"children": [],
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\ No newline at end of file
data/2.MySQL中阶/8.备份与恢复/3.mysqlhotcopy/config.json 已删除 100644 → 0
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{
"node_id": "mysql-0b976462e6314fa499a9f086c0eded8f",
"keywords": ["mysqlhotcopy"],
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data/2.MySQL中阶/8.备份与恢复/6.灾难恢复/config.json → data/2.MySQL中阶/8.备份与恢复/3.灾难恢复/config.json
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{ {
"node_id": "mysql-76b4d2f260f94ea1a6692d5a8dab2709", "node_id": "mysql-76b4d2f260f94ea1a6692d5a8dab2709",
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"灾难恢复"
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data/2.MySQL中阶/4.子查询/6. 列子查询/in_clumn.json → data/2.MySQL中阶/8.备份与恢复/3.灾难恢复/disaster_recovery.json
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{ {
"type": "code_options", "type": "code_options",
"author": "ccat", "author": "Mars",
"source": "in_column.md", "source": "disaster_recovery.md",
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\ No newline at end of file
data/2.MySQL中阶/8.备份与恢复/3.灾难恢复/disaster_recovery.md 0 → 100644
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# 灾难恢复
Joe 管理的一台 MySQL 服务器因意外断电，出现了文件损坏，无法启动。他需要将这台服务器恢复起来，下列步骤中哪些是需要执行的？
1. 在 my.cnf 中的`[mysqld]`一节添加 `innodb_force_recovery = 1` 。
2. 尝试启动，如果失败，尝试 2 ～ 6 间的其它参数
3. 启动后备份数据库
4. 删除数据库，清理数据目录
5. 备份 MySQL 数据目录下的 ib_logfile\* 和 ibdata\* 文件，然后删除
6. 将 my.cnf 中的 `innodb_force_recovery` 设为0
7. 重启MySQL
8. 导入数据
## 答案
```
1, 2, 3, 4, 5, 6, 7, 8
```
## 选项
### A
```
1, 2, 4, 5, 6, 8
```
### B
```
1, 2, 4, 5, 8
```
### C
```
1, 2, 4, 8
```
### D
```
1, 2, 3, 4, 6, 7, 8
```
data/2.MySQL中阶/8.备份与恢复/3.灾难恢复/dr_options.json 0 → 100644
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{
"type": "code_options",
"author": "Mars",
"source": "disaster_recovery.md",
"notebook_enable": false,
"exercise_id": "d971d72cd46f4bd38b0205b9a06f3798"
}
\ No newline at end of file
data/2.MySQL中阶/8.备份与恢复/3.灾难恢复/dr_options.md 0 → 100644
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# 灾难恢复选项
设定 `innodb_force_recovery` 的值时，可选的有哪些？
1. (SRV_FORCE_IGNORE_CORRUPT)：忽略损坏的数据页，继续运行MySQL服务。
2. (SRV_FORCE_NO_BACKGROUND)：防止主线程和任何清除线程运行。如果清除操作期间发生崩溃，则此恢复值将阻止崩溃。
3. (SRV_FORCE_NO_TRX_UNDO)：在崩溃后不运行事务回滚操作。
4. (SRV_FORCE_NO_IBUF_MERGE)：不执行插入缓冲的合并操作，此值可能会永久损坏数据文件。使用此值后，需要删除并重新创建所有辅助索引，并且需要将InnoDB设置为只读。
5. (SRV_FORCE_NO_UNDO_LOG_SCAN)：不查看重做日志，InnoDB存储引擎会将未提交的事务视为已提交。此值可能会永久损坏数据文件，需要将InnoDB设置为只读。
6. (SRV_FORCE_NO_LOG_REDO)：不执行与恢复相关重做日志的前滚操作。此值可能会永久损坏数据文件，使数据库页处于过时状态，这反过来又可能导致B树和其他数据库结构的损坏，需要将InnoDB设置为只读。
## 答案
全部都是
## 选项
### A
```
2, 3, 4, 5
```
### B
```
1, 2, 3, 4, 5
```
### C
```
1, 2, 4
```
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data/2.MySQL中阶/8.备份与恢复/4.xtrabackup/config.json 已删除 100644 → 0
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data/2.MySQL中阶/8.备份与恢复/5.完全备份和增量备份/config.json 已删除 100644 → 0
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{
"node_id": "mysql-1c793163cd8047e1a3b327f2c86a1f68",
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data/2.MySQL中阶/8.备份与恢复/7.自动备份/config.json 已删除 100644 → 0
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data/3.MySQL高阶/7.查询优化/4. PT-QUERY-DIGEST分析查询/config.json 已删除 100644 → 0
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"node_id": "mysql-626f1ca763b344558b3a5eefdb4885a2",
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data/3.MySQL高阶/7.查询优化/5.子查询优化/config.json 已删除 100644 → 0
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data/tree.json
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...@@ -973,21 +973,6 @@ ...@@ -973,21 +973,6 @@
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...@@ -1072,7 +1057,11 @@ ...@@ -1072,7 +1057,11 @@
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...@@ -1304,11 +1293,14 @@ ...@@ -1304,11 +1293,14 @@
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...@@ -1345,42 +1337,8 @@ ...@@ -1345,42 +1337,8 @@
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......
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