update basic.rst #5
Open
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| @@ -40,7 +40,7 @@ memtable被创建时，leveldb的后台压缩进程便会将利用其中的内 | |||
| log | |||
| ~~~ | |||
|
|
|||
| leveldb的写操作并不是直接写入磁盘的，而是首先写入到内存。假设写入到内存的数据还未来得及持久化，leveldb进程发生了异常，抑或是宿主机器发生了宕机，会造成用户的写入发生丢失。因此leveldb在写内存之前会首先将所有的写操作写到日志文件中，也就是log文件。当以下异常情况发生时，均可以通过日志文件进行恢复： | |||
| leveldb的写操作并不是直接写入内存的，而是首先写入到磁盘。假设写入到内存的数据还未来得及持久化，leveldb进程发生了异常，抑或是宿主机器发生了宕机，会造成用户的写入发生丢失。因此leveldb在写内存之前会首先将所有的写操作写到日志文件中，也就是log文件。当以下异常情况发生时，均可以通过日志文件进行恢复： | |||
There was a problem hiding this comment.
感谢！但是我认为在这里想表达的意思是：
Leveldb的写操作是更新memory db并返回，并不是直接触发一次磁盘写入。
或者我们可以更改为
leveldb在发生写操作时用户数据并不是直接写入磁盘的，而是将其缓存于内存中。
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
No description provided.