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Optimize DROP SPACE note #2002

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Jul 22, 2022
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Optimize DROP SPACE note #2002

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4 changes: 2 additions & 2 deletions docs-2.0/3.ngql-guide/9.space-statements/5.drop-space.md
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Expand Up @@ -4,7 +4,7 @@

!!! note

可以通过修改 Storage 服务配置文件中`auto_remove_invalid_space`的值为`false`，使`DROP SPACE`语句仅删除指定的逻辑图空间而保留硬盘上的所有数据。详情参见 [Storage 服务配置](../../5.configurations-and-logs/1.configurations/4.storage-config.md)。
`DROP SPACE`是否删除图空间对应的硬盘数据由 Storage 配置参数 auto_remove_invalid_space 决定。auto_remove_invalid_space 的默认值为`true`，表示会删除数据。如需在删除逻辑图空间时保留硬盘数据，将 auto_remove_invalid_space 的值修改为`false`。详情参见 [Storage 服务配置](../../5.configurations-and-logs/1.configurations/4.storage-config.md)。

## 前提条件

Expand Down Expand Up @@ -32,4 +32,4 @@ DROP SPACE [IF EXISTS] <graph_space_name>;

问：执行`DROP SPACE`语句删除图空间后，为什么磁盘的大小没变化？

答：如果使用 3.1.0 之前版本的 Nebula Graph, `DROP SPACE`语句仅删除指定的逻辑图空间，不会删除硬盘上对应图空间的目录和文件。如需删除硬盘上的数据，需手动删除相应文件的路径，文件路径为`<nebula_graph_install_path>/data/storage/nebula/<space_id>`。其中`<space_id>`可以通过`DESCRIBE SPACE {space_name}`查看。
答：如果使用 3.1.0 之前版本的 Nebula Graph, `DROP SPACE`语句仅删除指定的逻辑图空间，不会删除硬盘上对应图空间的目录和文件。如需删除硬盘上的数据，需手动删除相应文件的路径，文件路径为`<nebula_graph_install_path>/data/storage/nebula/<space_id>`。其中`<space_id>`可以通过`DESCRIBE SPACE {space_name}`查看。