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glossary: fix descrption about isolation #18536

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Sep 5, 2024
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glossary: fix descrption about isolation #18536

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2 changes: 1 addition & 1 deletion glossary.md
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Expand Up @@ -14,7 +14,7 @@ ACID 是指数据库管理系统在写入或更新资料的过程中，为保证

* 原子性 (atomicity) 指一个事务中的所有操作，或者全部完成，或者全部不完成，不会结束在中间某个环节。TiDB 通过 Primary Key 所在 [Region](#regionpeerraft-group) 的原子性来保证分布式事务的原子性。
* 一致性 (consistency) 指在事务开始之前和结束以后，数据库的完整性没有被破坏。TiDB 在写入数据之前，会校验数据的一致性，校验通过才会写入内存并返回成功。
* 隔离性 (isolation) 指数据库允许多个并发事务同时对其数据进行读写和修改的能力。隔离性可以防止多个事务并发执行时由于交叉执行而导致数据的不一致，主要用于处理并发场景。TiDB 目前只支持一种隔离级别，即可重复读。
* 隔离性 (isolation) 指数据库允许多个并发事务同时对其数据进行读写和修改的能力。隔离性可以防止多个事务并发执行时由于交叉执行而导致数据的不一致，主要用于处理并发场景。关于目前 TiDB 支持的隔离级别，请参考 [TiDB 事务隔离级别](/transaction-isolation-levels.md#tidb-事务隔离级别)。
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* 持久性 (durability) 指事务处理结束后，对数据的修改就是永久的，即便系统故障也不会丢失。在 TiDB 中，事务一旦提交成功，数据全部持久化存储到 TiKV，此时即使 TiDB 服务器宕机也不会出现数据丢失。

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