Updated February 17, 2023
Introduction to Redis Namespace
In Redis, if the data is no longer used in the database, it seems to be schema-less and difficult to identify and organize it. So, by using a standard naming convention, it can be easy to identify and structure it properly. It can be used at the time of data conversion, data migration, and deletion. Redis namespace keys and Redis namespace can be easy for this identification and helps in the housekeeping of the data.
Key Takeaways
The following should be implied in Redis key namespace.
- The keys should be in readable form in understanding the structure.
- The schema should be manageable.
- Query keys should be in a simple format.
- Redis server saves all the keys to all the mentioned applications.
- Prefer to follow the standard namespace for every application.
What is Redis Namespace?
Database tends to save the data, but at times developers fail to track the data that is put into Redis. It is quite natural, but if we ignore it results in data loss and key expiration or leads to the retirement of modules. So, if the data is no longer used and it is occupying unnecessary space, it can be defined with a standard naming convention and by this structured naming convention, the data housekeeping will be in a track and easy to work with data. The namespace structure is simple, the user can use the colon to delimit the name of the key, and here Redis namespace is a good practice.
How to Use the Redis Namespace?
The user should have a basic understanding of GET and SET commands, and it can be helpful to imply the Redis namespace effectively in the database using the namespace. The user can also save the data in Redis. To imply the namespace, a colon must be used as a separator or delimiter followed by a numeric value as shown below.
1. SET course:1 “AWS”
2. OK
1. SET services:1 “23”
2. OK
1. SET course:2 “DevOps”
2. OK
1. SET service:2 “8”
2. OK
This is how the namespace can be effectively used in Redis and now it is easy to fetch the data using GET commands.
Redis Namespace Interface
In the Redis database, the namespace features offer an interface that needs to work as a namespace subset of the Redis keyspace. That is the key with a common beginning and needs a Redis-rb gem. Redis namespace also provisions with Proc as a standard namespace and it consumes the result string with namespace at runtime execution.
Redis_standard connection = Redis.newnamespace_Redis = Redis :: Namespace.new(Proc.new { current_tenant }, Redis : Redis_connection)Hence the Redis namespace provides the enclosed interface to Redis by maintaining an interior registry to store the method signatures in the Redis database offered by the Redis-RB gem. So, the user can track the arguments, where the namespace is added, and in turn execute the values if the namespace is removed.
Redis Keys with Namespace
The important criteria in the namespace are key schema and key size. The key size should be defined as it is difficult to maintain and understand if the user passes any plain strings. If the size of the key is maximum, the memory consumption is also high which leads to slow searching in lookup keys for comparison. So, to overcome all the above cases, it is advised to have a standard key schema to organize better. The user data can also be stored in memory as security objects.
Redis Namespace Track
- Redis keys are designed as binary-safe.
- The valid string holds a null value and is also considered a valid key. Redis keys are allowed with a maximum size of 512MB.
- Maximum size keys are not advised due to lagging performance in the lookup and search option if there is any cost involved.
- The short keys are also not recommended like f11s. Instead, the user can give names in a readable format.
- Design a structure, that is understood by others easily.
- Group the objects using a separation is best to name the keys.
Redis Namespace from Migrating
Data migration has two types, one is to run new or old systems in parallel for N number of days or weeks and the other is to shut down the existing setup, migrate the data and then start the new setup.
The user has to initiate a new side process, the old and new, and then the old process will persist to retirement and the scheduled jobs will get processed till it is replaced with new ones. The client configuration should be specified to the concerned point to the new system so that the saved jobs will get migrated into the new one. For example, if the old database is using fooo namespaces in database zero, then the user requires the new system to use the database one with no namespace.
FAQs
Given below are the FAQs mentioned:
Q1. Is it possible to give a namespace to multiple applications?
Answer: If the user is managing multiple applications, the namespace should be provided accordingly to differentiate between the applications.
Q2. Mention a best practice to avoid duplicates in the namespace.
Answer: The common use of Redis is to save as a secondary data store, whereas the primary data is managed in MongoDB or PostgreSQL. So, the developers at times forget to erase the data in Redis once it is migrated to the primary database. It leads to the dependency of cross-datastore and needs cascading delete. So, it is advised to launch a cleanup procedure periodically to remove the related tidbits and relevant copies.
Q3. What happens if the required version is not present in the gem?
Answer: If the given version is not present in the gem, it doesn’t follow any specific command and it can’t follow any namespace structure. It signifies that Redis:: namespace skips the unknown commands to the Redis connection and gives surprising effects without any modification. If the user comes across any command that is not supported, he can submit a pull request or report that issue to the official website.
Conclusion
Hence these are the basic features of the namespace in the Redis database, and it should be implied accordingly to prevent any duplicates and can handle effectively a time of data conversion, migration, and deletion and supports higher dimensional data management.
Recommended Articles
This is a guide to Redis Namespace. Here we discuss the introduction, use, redis namespace interface, track, and FAQs. You may also have a look at the following articles to learn more –
