How redis reads the latest cache file

In order to read the latest cache file from Redis: trigger RDB persistence through the BGSAVE command, create a data copy and persist the data into the RDB file. Wait for persistence to complete (INFO PERSISTENCE to check progress). An RDB file (usually dump.rdb) is generated when persistence is complete. Use the redis-cli utility to read the RDB file. Parse the data (using a third-party library or manually). Restore data to cache.

How to read the latest cache file from Redis

In order to read the latest cache file from Redis, you can Use the following steps:

1. Trigger RDB persistence through the BGSAVE command

BGSAVE The command will create a copy of the Redis process, which is responsible for Persist data into RDB files. This command will not block the main Redis process.

2. Wait for persistence to complete

Use the INFO PERSISTENCE command to check the persistence progress. When the rdb_last_bgsave_status field changes to ok, it means persistence is complete.

3. Use RDB file name

When persistence is completed, Redis will generate an RDB file. This file is usually located in the Redis data directory and is named dump.rdb.

4. Read RDB files

You can use the redis-cli utility to read RDB files. The following command will print the contents of an RDB file in JSON format:

<code>redis-cli --rdb dump.rdb</code>

5. Parse the data

An RDB file contains a binary representation of the key-value pairs in the Redis database. You can use third-party libraries or parse the data manually.

6. Restoring the cache

Once the RDB file has been parsed, the data can be restored to the cache.

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