For upgrading the Azure cache for Redis v4 to v6, Do we need to update the NuGet Package of StackExchange.Redis also
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which version are you currently using for StackExchange.Redis. because the latest version is 2.6.96– RameshkumarCommented Mar 2, 2023 at 6:33
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We are using current version StackExchange.Redis.2.2.4 Upgraded to latest StackExchange.Redis.2.6.96 also Is this enough to support Redis 6?– Pandurang ShindeCommented Mar 2, 2023 at 6:45
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Please can can you share some steps need to do from code/solution side– Pandurang ShindeCommented Mar 2, 2023 at 6:46
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1 Answer
There is no specific version compatibility between Redis and StackExchange.Redis library (see GitHub link). Azure Redis and StackExchange.Redis are compatible as long as they are using the same RESP (REdis Serialization Protocol) version.
Redis version 6 and above supports two protocols: the old protocol, RESP2, and a new one introduced with Redis 6, RESP3. In Redis 6 connections start in RESP2 mode, so clients implementing RESP2 do not need to be updated or changed (documentation link).
StackExchange.Redis library currently does not support RESP3, therefore it will default to RESP2. It's worth saying that there are plans to implement RESP3 in a future version but these changes are just being discussed and there is no planned release date yet.
So there is no immediate need to update the NuGet package of StackExchange.Redis because the underlying protocol has not changed.
I would also recommend asking for Sitecore Support advice before upgrading any dependencies of Sitecore internal libraries. If there are any non-compatibal changes in methods signature in newer versions of StackExchange.Redis, you may break internal Sitecore code that relies on this library.
