redis-dump tool is used for data migration in the cluster
Build environment:
192.168.19.201 redis-cluster 6379 7001 7002 rvm redis-dump
192.168. 19.202 redis-cluster 6379 7001 7002
192.168.19.203 redis-cluster 6379 7001 7002
Since installing the redis-dump tool requires the use of rvm and gem tools, it must be installed in advance
1. Install the dependency packages needed to install rvm and other tools in advance
#yum -y install zlib zlib-devel pcre pcre-devel gcc gcc-c openssl openssl-devel libevent libevent-devel perl unzip net-tools wget curl
If you do not install the above dependencies, an error will be reported
2. Install rvm
#gpg2 --keyserver hkp://keys.gnupg.net --recv -keys D39DC0E3 download key
If the error message shows
, then you can use
curl -sSL https://rvm.io/ mpapis.asc | gpg2 --import -
curl -sSL https://rvm.io/pkuczynski.asc | gpg2 --import -
#curl -L get.rvm.io | bash -s stable /hosts
97.107.133.48 get.Rvm.io —Add content
Just try again
Display the above The content is that the installation was successful.
Use the find / -name rvm -print command to view the path of the rvm installation.
#find / -name rvm -print --- Display the result and it is installed. Success
Make the configuration file effective
#source /etc/profile.d/rvm.sh
Download rvm dependencies
Change gem source
#gem source --add https://gems.ruby-china.com ---New gem China local source
#gem source -l —-View gem source
#gem source -- remove RubyGems.org | your community gem host ----Delete foreign official sources
##Verified version:
It probably means to install a higher version. You can directly follow the command he gave.
#gem install redis -v 4.4.0
The installation is successful, then execute the install redis-dump command
#gem install redis-dump
The above result is successful
The above is the detailed content of How to install redis-dump tool. For more information, please follow other related articles on the PHP Chinese website!

Compared with other databases, Redis has the following unique advantages: 1) extremely fast speed, and read and write operations are usually at the microsecond level; 2) supports rich data structures and operations; 3) flexible usage scenarios such as caches, counters and publish subscriptions. When choosing Redis or other databases, it depends on the specific needs and scenarios. Redis performs well in high-performance and low-latency applications.

Redis plays a key role in data storage and management, and has become the core of modern applications through its multiple data structures and persistence mechanisms. 1) Redis supports data structures such as strings, lists, collections, ordered collections and hash tables, and is suitable for cache and complex business logic. 2) Through two persistence methods, RDB and AOF, Redis ensures reliable storage and rapid recovery of data.

Redis is a NoSQL database suitable for efficient storage and access of large-scale data. 1.Redis is an open source memory data structure storage system that supports multiple data structures. 2. It provides extremely fast read and write speeds, suitable for caching, session management, etc. 3.Redis supports persistence and ensures data security through RDB and AOF. 4. Usage examples include basic key-value pair operations and advanced collection deduplication functions. 5. Common errors include connection problems, data type mismatch and memory overflow, so you need to pay attention to debugging. 6. Performance optimization suggestions include selecting the appropriate data structure and setting up memory elimination strategies.

The applications of Redis in the real world include: 1. As a cache system, accelerate database query, 2. To store the session data of web applications, 3. To implement real-time rankings, 4. To simplify message delivery as a message queue. Redis's versatility and high performance make it shine in these scenarios.

Redis stands out because of its high speed, versatility and rich data structure. 1) Redis supports data structures such as strings, lists, collections, hashs and ordered collections. 2) It stores data through memory and supports RDB and AOF persistence. 3) Starting from Redis 6.0, multi-threaded I/O operations have been introduced, which has improved performance in high concurrency scenarios.

RedisisclassifiedasaNoSQLdatabasebecauseitusesakey-valuedatamodelinsteadofthetraditionalrelationaldatabasemodel.Itoffersspeedandflexibility,makingitidealforreal-timeapplicationsandcaching,butitmaynotbesuitableforscenariosrequiringstrictdataintegrityo

Redis improves application performance and scalability by caching data, implementing distributed locking and data persistence. 1) Cache data: Use Redis to cache frequently accessed data to improve data access speed. 2) Distributed lock: Use Redis to implement distributed locks to ensure the security of operation in a distributed environment. 3) Data persistence: Ensure data security through RDB and AOF mechanisms to prevent data loss.

Redis's data model and structure include five main types: 1. String: used to store text or binary data, and supports atomic operations. 2. List: Ordered elements collection, suitable for queues and stacks. 3. Set: Unordered unique elements set, supporting set operation. 4. Ordered Set (SortedSet): A unique set of elements with scores, suitable for rankings. 5. Hash table (Hash): a collection of key-value pairs, suitable for storing objects.


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