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fix some docs error #3926

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merged 2 commits into from
Mar 4, 2022
Merged

fix some docs error #3926

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c6b2b43
fix some docs error
Mar 3, 2022
105d8ce
remove useless code
Mar 3, 2022
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2 changes: 1 addition & 1 deletion ...main/java/org/apache/rocketmq/client/impl/consumer/ConsumeMessageConcurrentlyService.java
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Original file line number Diff line number Diff line change
Expand Up @@ -72,7 +72,7 @@ public ConsumeMessageConcurrentlyService(DefaultMQPushConsumerImpl defaultMQPush

String consumeThreadPrefix = null;
if (consumerGroup.length() > 100) {
consumeThreadPrefix = new StringBuilder("ConsumeMessageThread_").append(consumerGroup.substring(0, 100)).append("_").toString();
consumeThreadPrefix = new StringBuilder("ConsumeMessageThread_").append(consumerGroup, 0, 100).append("_").toString();
} else {
consumeThreadPrefix = new StringBuilder("ConsumeMessageThread_").append(consumerGroup).append("_").toString();
}
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12 changes: 6 additions & 6 deletions docs/cn/Deployment.md
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Expand Up @@ -49,7 +49,7 @@ The broker[broker-a,192.169.1.2:10911] boot success...
**1）启动 NameServer**

```shell
### 第一步先启动broker
### 第一步先启动namesrv
$ nohup sh mqnamesrv &

### 验证namesrv是否启动成功
Expand All @@ -69,14 +69,14 @@ $ nohup sh mqbroker -n 192.168.1.1:9876 -c $ROCKETMQ_HOME/conf/2m-noslave/broker
...
```

上面显示的boot命令用于单个NameServer的情况。对于多个NameServer的集群，broker boot命令中-n参数后面的地址列表用分号隔开，例如 192.168.1.1 : 9876; 192.161.2 : 9876
上面显示的启动命令用于单个NameServer的情况。对于多个NameServer的集群，broker 启动命令中-n参数后面的地址列表用分号隔开，例如 192.168.1.1:9876;192.161.2:9876

### 3 多Master多Slave模式-异步复制

每个主节点配置多个从节点，多对主从。HA采用异步复制，主节点和从节点之间有短消息延迟（毫秒）。这种模式的优缺点如下：

- 优点:
1. 即使磁盘损坏，也不会丢失极少的消息，不影响消息的实时性能。
- 优点:
1. 即使磁盘损坏，也只会丢失极少的消息，不影响消息的实时性能。
2. 同时，当主节点宕机时，消费者仍然可以消费从节点的消息，这个过程对应用本身是透明的，不需要人为干预。
3. 性能几乎与多Master模式一样高。
- 缺点:
Expand All @@ -87,7 +87,7 @@ $ nohup sh mqbroker -n 192.168.1.1:9876 -c $ROCKETMQ_HOME/conf/2m-noslave/broker
**1）启动 NameServer**

```shell
### 第一步先启动broker
### 第一步先启动namesrv
$ nohup sh mqnamesrv &

### 验证namesrv是否启动成功
Expand Down Expand Up @@ -132,7 +132,7 @@ $ nohup sh mqbroker -n 192.168.1.1:9876 -c $ROCKETMQ_HOME/conf/2m-2s-async/broke
**1）启动NameServer**

```shell
### 第一步启动broker
### 第一步启动namesrv
$ nohup sh mqnamesrv &

### 验证namesrv是否启动成功
Expand Down