Kafka Offset相关命令总结

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　作者：尹正杰

版权声明：原创作品，谢绝转载！否则将追究法律责任。

一.查询topic的offset的范围

1>.查询某个topic的offset的最小值

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114: -topic yinzhengjie --time -

yinzhengjie::　　　　　　　　　　　　#很显然，第一列为topic名称，第二列为partition名称，第三列则是offset。为估计仔细的你应该已经发现了最小的offset为0，分区数为30个

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114: -topic yinzhengjie --time - | wc -l

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114:9092 -topic yinzhengjie --time -2

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114: -topic data.batch.ad --time -

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114: -topic data.batch.ad --time - |wc -l

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114:9092 -topic data.batch.ad --time -2

2>.查询某个topic的offset的最大值

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114: -topic yinzhengjie --time -

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

yinzhengjie::

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114: -topic yinzhengjie --time - | wc -l

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114:9092 -topic yinzhengjie --time -1

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114: -topic data.batch.ad --time -

data.batch.ad::　　　　　　　　#很明显，以冒号为分割，第一列为topic名称，第二列为partition 编号，第三列为当前最大的便宜量位置！

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

data.batch.ad::

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114: -topic data.batch.ad --time - | wc -l

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list 10.1.2.114:9092 -topic data.batch.ad --time -1

 

二.查看consumer group列表，使用--list参数

　　查看consumer group列表有新、旧两种命令，分别查看新版(信息保存在broker中)consumer列表和老版(信息保存在zookeeper中)consumer列表，因而需要区分指定bootstrap--server和zookeeper参数：（本片博客测试的kafka版本为0.10.2.1）

[root@node101.yinzhengjie.org.cn ~]# kafka-consumer-groups.sh --zookeeper 10.1.2.114: --list

Note: This will only show information about consumers that use ZooKeeper (not those using the Java consumer API).　　　　　　　　#很显然，为这里使用的是kafka 0.10..1版本，我们是查询不到对应的信息的！

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-consumer-groups.sh --zookeeper 10.1.2.114:2181 --list　　　　　　　　　　　　　　　　#老版本的consumer信息都保存在zookeeper中，很显然，0.10.2.1这个版本已经将consumer信息自己保存啦！

[root@node101.yinzhengjie.org.cn ~]# kafka-consumer-groups.sh --bootstrap-server 10.1.2.114: --list　　　　　　　　　　　　#查看新版consumer列表，很显然，我们可以查询到对应的数据

Note: This will only show information about consumers that use the Java consumer API (non-ZooKeeper-based consumers).

id-data.batch.ad

console-consumer-

id-data.batch.env

id-data.batch.er

id-data.batch.pl

console-consumer-

id-data.batch.op

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-consumer-groups.sh --bootstrap-server 10.1.2.114:9092 --list　　　　　　　　　　　　#查看新版consumer列表，很显然，我们可以查询到对应的数据

三.查看指定group.id 的消费者消费情况 （kafka-consumer-groups.sh）

[root@node101.yinzhengjie.org.cn ~]# kafka-consumer-groups.sh --new-consumer --bootstrap-server 10.1.2.114:  --group id-data.batch.ad --describe

Note: This will only show information about consumers that use the Java consumer API (non-ZooKeeper-based consumers).

TOPIC                          PARTITION  CURRENT-OFFSET  LOG-END-OFFSET  LAG        CONSUMER-ID                                       HOST                           CLIENT-ID

data.batch.ad                                               consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                               consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                               consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                               consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                               consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                               consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                               consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                               consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                               consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                               consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

data.batch.ad                                              consumer--53498a12-e62b-46c8-9c5c-ad97f807698d   /10.1.2.112                    consumer-

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# kafka-consumer-groups.sh --new-consumer --bootstrap-server 10.1.2.114:  --group id-data.batch.ad --describe | grep ad | wc -l

Note: This will only show information about consumers that use the Java consumer API (non-ZooKeeper-based consumers).

[root@node101.yinzhengjie.org.cn ~]# 

简单对每列进行说明：

TOPIC：

　　消费者的topic名称　　

PARTITION：

　　分区数的名称　　

CURRENT-OFFSET：

　　consumer group最后一次提交的offset

LOG-END-OFFSET：

　　最后提交的生产消息offset

LAG

　　消费offset与生产offset之间的差值

CONSUMER-ID

　　消费者的ID编号，我们知道消费者组里面可以有最少要有一个消费者，当然也可以有多个消费者。

HOST

　　消费者的主机IP地址。

CLIENT-ID

　　链接的ID编号。

[root@node101.yinzhengjie.org.cn ~]# kafka-consumer-groups.sh --new-consumer --bootstrap-server 10.1.2.114:9092 --group id-data.batch.ad --describe

四. 查询 __consumer_offsets topic 所有内容

1>.运行下面命令前先要在consumer.properties中设置exclude.internal.topics=false

[root@node101.yinzhengjie.org.cn ~]# cat /soft/kafka/config/consumer.properties

# Licensed to the Apache Software Foundation (ASF) under one or more

# contributor license agreements.  See the NOTICE file distributed with

# this work for additional information regarding copyright ownership.

# The ASF licenses this file to You under the Apache License, Version 2.0

# (the "License"); you may not use this file except in compliance with

# the License.  You may obtain a copy of the License at

#

#    http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

# see kafka.consumer.ConsumerConfig for more details

# Zookeeper connection string

# comma separated host:port pairs, each corresponding to a zk

# server. e.g. "127.0.0.1:3000,127.0.0.1:3001,127.0.0.1:3002"

zookeeper.connect=127.0.0.1:

# timeout in ms for connecting to zookeeper

zookeeper.connection.timeout.ms=

#consumer group id

group.id=test-consumer-group

#consumer timeout

#consumer.timeout.ms=

exclude.internal.topics=false

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# cat /soft/kafka/config/consumer.properties

2>.0.11.0.0之前版本

[root@node101.yinzhengjie.org.cn ~]# kafka-console-consumer.sh --topic __consumer_offsets --bootstrap-server 10.1.2.114: --formatter "kafka.coordinator.GroupMetadataManager\$OffsetsMessageFormatter" --consumer.config /soft/kafka/config/consumer.properties --from-beginning

.......

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,96ef03f3-528a--9b56-7b98ea258ba4],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

[-data.batch.ad,data.batch.ad,]::[OffsetMetadata[,b350dc94-868b-42a5-91f3-7fb59ca7ea93],CommitTime ,ExpirationTime ]

.......

[root@node101.yinzhengjie.org.cn ~]# kafka-console-consumer.sh --topic __consumer_offsets --bootstrap-server 10.1.2.114:9092 --formatter "kafka.coordinator.GroupMetadataManager\$OffsetsMessageFormatter" --consumer.config /soft/kafka/config/consumer.properties --from-beginning

3>. 0.11.0.0之后版本(含)

[root@node101.yinzhengjie.org.cn ~]# kafka-console-consumer.sh --topic __consumer_offsets --bootstrap-server 10.1.2.114:9092 --formatter "kafka.coordinator.group.GroupMetadataManager\$OffsetsMessageFormatter" --consumer.config /soft/kafka/config/consumer.properties --from-beginning

五.

六.

Kafka Offset相关命令总结的更多相关文章

  1. kafka的offset相关知识

    Offset存储模型 由于一个partition只能固定的交给一个消费者组中的一个消费者消费,因此Kafka保存offset时并不直接为每个消费者保存,而是以 groupid-topic-partit ...

  2. kafka 相关命令 偏移重置

    kafka官方文档 https://kafka.apache.org/documentation.html#quickstart kafka 安装文档 https://www.jianshu.com/ ...

  3. kafka的相关操作脚本

    总结最近用到的kafka相关命令和脚本. 1.创建Topic./kafka-topics.sh --zookeeper cc13-141:2182 --topic mytopic --replicat ...

  4. Redis key 相关命令

    其实本质上,Redis 就是一个Key---Value 数据库.这里我先介绍下Redis中关于的key的相关命令, 注意:key是字符串存储,但是不能使用 空格 或者 “\n”,value 则可以使用 ...

  5. redis-key相关命令

    本篇主要介绍和redis的key进行操作的相关命令. 命令 描述 复杂度 返回值 DEL key [key ...] 删除给定的一个或多个 key .不存在的 key 会被忽略.删除单个列表.集合.有 ...

  6. [Redis]Redis的五种数据类型与键值/服务器相关命令

    -------------------------------------------------------------------------------------- String(字符串):最 ...

  7. kafka集群监控工具之三--kafka Offset Monitor

    1.介绍 一般情况下,功能简单的kafka项目  使用运维命令+kafka Offset Monitor 就足够用了. 2.使用2.1 部署 github下载jar包 KafkaOffsetMonit ...

  8. 关于　Kafka offset

    查询topic的offset的范围 用下面命令可以查询到topic:Mytopic broker:SparkMaster:9092的offset的最小值: bin/kafka-run-class.sh ...

  9. redis03----集合 set 相关命令

    集合 set 相关命令 集合的性质: 唯一性,无序性,确定性 注: 在string和link的命令中,可以通过range 来访问string中的某几个字符或某几个元素 但,因为集合的无序性,无法通过下 ...

随机推荐

  1. 5G到来，数据中心如何变革？

    导读 5G将要到来,除改变人们的工作生活外,其带宽.延时.连接特性也逼迫着数据中心变革,以满足5G时代需求.具体而言,5G将从形状规模.硬件组成及软件规模三面变革数据中心. 5G带来什么 高带宽.低延 ...

  2. Jquery中val方法使用的坑

    Jquery中val方法使用 val()// 取得第一个匹配元素的当前值 val(val)// 设置所有匹配元素的值 val([val1, val2])// 设置多选的checkbox.多选selec ...

  3. Typecho——数据库无法连接问题

    报错 对不起,无法连接数据库,请先检查数据库配置再继续进行安装 解决方案 创建数据库 reate database databaseName; 远程权限 开启远程权限 GRANT ALL PRIVIL ...

  4. PHP——base64的图片转为文件图片

    前言 网上很多,真的是有毒吧,一个那么简单至于写的乱七八糟的嘛,醉了. 代码 具体都写注释中了,不懂的可以评论或者私信我 public function upload() { //接收前台的值 $ba ...

  5. Crazy Circuits HDU - 3157（有源汇有上下界最小流）

    给出每条边的下界 求最小流 板题 提供两个板子代码 虽然这个题 第一个比较快 但在loj上https://loj.ac/problem/117 的板题  第一个1700+ms 第二个才600+ms   ...

  6. CODEFORCES掉RATING记 #2

    比赛:Codeforces Round #425 (Div. 2) 时间:2017.7.25晚 先orz zjt rank4 一场加300rating A:傻题,判断\(\lfloor\frac{n} ...

  7. Android stadio 生成项目 Cannot find System Java Compiler. Ensure that you have installed a JDK (not just a JRE)

    解决方法 File-->Project-->Structrue-->SDK Location-->JDK location Use embedded JDK 前面勾去掉,指定一 ...

  8. 洛谷P4689 [Ynoi2016]这是我自己的发明（莫队，树的dfn序，map，容斥原理）

    洛谷题目传送门 具体思路看别的题解吧.这里只提两个可能对常数和代码长度有优化的处理方法. I 把一个询问拆成\(9\)个甚至\(16\)个莫队询问实在是有点珂怕. 发现询问的一边要么是一个区间,要么是 ...

  9. Nowcoder | [题解-N165]牛客网NOIP赛前集训营-普及组（第二场）

    啊...表示一大早还没睡醒就开始打比赛(开始前一分钟的我还在桌子上趴着休眠)...表示题目思路清奇(尤其C题)...但是我还是太蒻了...\(D\)题暴力都没打...题解正式开始之前先\(\%\)一下 ...

  10. [luogu1198][bzoj1012][JSOI2008]最大数【线段树+分块】

    题目描述 区间查询最大值,结尾插入,强制在线. 分析 线段树可以做,但是练了一下分块,发现自己打错了两个地方,一个是分块的地方把/打成了%,还有是分块的时候标号要-1. 其他也没什么要多讲的. 代码 ...