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Redis is "memory monster". Storing data as "compressed json string" minimizes memory usage. Is there any built-in compression option in Redis Db?
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When Redis goes down, you have to deal with it. It is the same as if your file system is gone or your SQL Server is down. A lot of those systems disable all writes and set their cluster in maintenance state.
Within Redis, there are two different ways of persisting data to disk. One is a method called snapshotting that takes the data as it exists at one moment in time and writes it to disk. The other method is called AOF, or append—only file, and it works by copying incoming write commands to disk as they happen.
Redis employs a primary-replica architecture and supports asynchronous replication where data can be replicated to multiple replica servers. This provides improved read performance (as requests can be split among the servers) and faster recovery when the primary server experiences an outage.
Redis uses LZF light data compressor at the dump time, so it won't lessen the memory consumption. Implying that the redis does not compresses the data in memory and stores it as a string.You must deploy your own client side compression code.
The lua scripting also provides the compression algorithm but the branch is relatively new and therefore won't be advisable to use at production level.
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