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new e611ab9 [Docs] Supply BE config docs of setting and examples (#4641)
e611ab9 is described below
commit e611ab96e72f299479082fbc496cbe35bdab48c2
Author: EmmyMiao87 <[email protected]>
AuthorDate: Mon Sep 28 13:36:12 2020 +0800
[Docs] Supply BE config docs of setting and examples (#4641)
---
docs/en/administrator-guide/config/be_config.md | 46 +++++++++++++++++++++-
docs/zh-CN/administrator-guide/config/be_config.md | 46 +++++++++++++++++++++-
2 files changed, 88 insertions(+), 4 deletions(-)
diff --git a/docs/en/administrator-guide/config/be_config.md
b/docs/en/administrator-guide/config/be_config.md
index 33a9ef3..a2c2af6 100644
--- a/docs/en/administrator-guide/config/be_config.md
+++ b/docs/en/administrator-guide/config/be_config.md
@@ -34,10 +34,47 @@ This document mainly introduces the relevant configuration
items of BE.
(TODO)
## Set configuration items
-(TODO)
+
+There are two ways to configure BE configuration items:
+
+1. Static configuration
+
+ Add and set configuration items in the `conf/be.conf` file. The
configuration items in `be.conf` will be read when BE starts. Configuration
items not in `be.conf` will use default values.
+
+2. Dynamic configuration
+
+ After BE starts, the configuration items can be dynamically set with
the following commands.
+
+ ```curl -X POST
http://{be_ip}:{be_http_port}/api/update_config?{key}={value}'```
+
+ **Configuration items modified in this way will become invalid after
the BE process restarts. **
## Examples
-(TODO)
+
+1. Modify `max_compaction_concurrency` statically
+
+ By adding in the `be.conf` file:
+
+ ```max_compaction_concurrency=5```
+
+ Then restart the BE process to take effect the configuration.
+
+2. Modify `streaming_load_max_mb` dynamically
+
+ After BE starts, the configuration item `streaming_load_max_mb` is
dynamically set by the following command:
+
+ ```curl -X POST
http://{be_ip}:{be_http_port}/api/update_config?streaming_load_max_mb=1024```
+
+ The return value is as follows, indicating that the setting is
successful.
+
+ ```
+ {
+ "status": "OK",
+ "msg": ""
+ }
+ ```
+
+ **The configuration will be invalid after BE restarted. **
## Configurations
@@ -385,6 +422,11 @@ Indicates how many tablets in this data directory failed
to load. At the same ti
### `min_compaction_failure_interval_sec`
+* Type: int32
+* Description: During the cumulative compaction process, when the selected
tablet fails to be merged successfully, it will wait for a period of time
before it may be selected again. The waiting period is the value of this
configuration.
+* Default value: 600
+* Unit: seconds
+
### `min_cumulative_compaction_num_singleton_deltas`
### `min_file_descriptor_number`
diff --git a/docs/zh-CN/administrator-guide/config/be_config.md
b/docs/zh-CN/administrator-guide/config/be_config.md
index bde36f4..dd90c2f 100644
--- a/docs/zh-CN/administrator-guide/config/be_config.md
+++ b/docs/zh-CN/administrator-guide/config/be_config.md
@@ -34,10 +34,47 @@ under the License.
（TODO）
## 设置配置项
-（TODO）
+
+BE 的配置项有两种方式进行配置：
+
+1. 静态配置
+
+ 在 `conf/be.conf` 文件中添加和设置配置项。`be.conf` 中的配置项会在 BE 进行启动时被读取。没有在
`be.conf` 中的配置项将使用默认值。
+
+2. 动态配置
+
+ BE 启动后，可以通过一下命令动态设置配置项。
+
+ ```curl -X POST
http://{be_ip}:{be_http_port}/api/update_config?{key}={value}'```
+
+ **通过该方式修改的配置项将在 BE 进程重启后失效。**
## 应用举例
-（TODO）
+
+1. 静态方式修改 `max_compaction_concurrency`
+
+ 通过在 `be.conf` 文件中添加：
+
+ ```max_compaction_concurrency=5```
+
+ 之后重启 BE 进程以生效该配置。
+
+2. 动态方式修改 `streaming_load_max_mb`
+
+ BE 启动后，通过下面命令动态设置配置项 `streaming_load_max_mb`:
+
+ ```curl -X POST
http://{be_ip}:{be_http_port}/api/update_config?streaming_load_max_mb=1024```
+
+ 返回值如下，则说明设置成功。
+
+ ```
+ {
+ "status": "OK",
+ "msg": ""
+ }
+ ```
+
+ **BE 重启后该配置将失效。**
## 配置项列表
@@ -384,6 +421,11 @@ load tablets from header failed, failed tablets size: xxx,
path=xxx
### `min_compaction_failure_interval_sec`
+* 类型：int32
+* 描述：在 cumulative compaction 过程中，当选中的 tablet
没能成功的进行版本合并，则会等待一段时间后才会再次有可能被选中。等待的这段时间就是这个配置的值。
+* 默认值：600
+* 单位：秒
+
### `min_cumulative_compaction_num_singleton_deltas`
### `min_file_descriptor_number`
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