Riak Redis Add-on (RRA)?

[ruichuan]

Hi, I'm trying to use Riak Redis Add-on (RRA) to set up a caching level for Riak.

According to the document at https://docs.riak.com/riak/kv/latest/add-ons/redis/set-up-rra/index.html#install-riak-redis-add-on-rra, it says that "Note: Riak Redis Add-on (RRA) is available to Enterprise customers for download in the usual Zendesk forums."

I guess there isn't an enterprise version now. So, I'm wondering whether there is any Riak Redis Add-on which we could use? As I can't find any, I'm asking for help and more information.

Thanks,
-rc

[martinsumner]

The open source version is available - https://github.com/basho/cache_proxy.

There is an enterprise version on the basho repo which is still private, and has updates on it (by comparison to the open source one).

@martincox - can the switch be flicked on https://github.com/basho/cache_proxy_ee to make this public now?

[ruichuan]

Thanks much for the quick response. As we're using Riak 2.9.0 in our setup, does the open-source cache proxy or the enterprise version work with riak 2.9.0? Cheers, -rc

…

On Fri, Jul 3, 2020 at 9:07 AM Martin Sumner ***@***.***> wrote: The open source version is available - https://github.com/basho/cache_proxy. There is an enterprise version on the basho repo which is still private, and has updates on it (by comparison to the open source one). @martincox <https://github.com/martincox> - can the switch be flicked on https://github.com/basho/cache_proxy_ee to make this public now? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1768 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAQSEDAS7BJVHVC3OQHUK6TRZV7S7ANCNFSM4OPFUR6Q> .

[martinsumner]

Don't know, I'm not aware of anyone who uses the cache_proxy - and there's nothing in the riak_test suite we use for riak releases that proves it. So I'm afraid you will need to test yourself to find out.

[ruichuan]

Ok, thanks for the information. Cheers, -rc

…

On Fri, Jul 3, 2020 at 10:47 AM Martin Sumner ***@***.***> wrote: Don't know, I'm not aware of anyone who uses the cache_proxy - and there's nothing in the riak_test suite we use for riak releases that proves it. So I'm afraid you will need to test yourself to find out. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[martincox]

That repo should be visible now @ruichuan 👍

[ruichuan]

Thanks! Now I think of the caching. As we're using LevelDB as the backend storage. LevelDB has its own in-memory memtable, so storage access will check memtable first before reaching other on-disk levels. Is that memtable good enough as a cache, compared with setting up other dedicated caching layers? Thanks, -rc

…

On Tue, Jul 7, 2020 at 3:40 PM Martin Cox ***@***.***> wrote: That repo should be visible now @ruichuan <https://github.com/ruichuan> 👍 — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#1768 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAQSEDB3HBCOKQYGKCY4EVTR2MQTNANCNFSM4OPFUR6Q> .

[martinsumner]

Hard to comment, as I've not used the Redis add-on. However, if your aim is to minimise latency, then there are a number of network hops necessary to extract an object from Riak, that could be avoided by extracting an object direct from a Redis cache. So although all Riak backends try to keep active objects in cache (either in backend memory or page cache), an un-contended Redis lookup would still have a faster response time than a Riak GET.

But please proceed with caution, if you hit problems you're unlikely to be able to find someone with experience of the Redis add-on to help.

[ruichuan]

I'm also planning to write a Redis module for syncing up between Redis and Riak. I'm wondering whether there is a Riak C or C++ client which could interact with the recent riak versions? I found https://github.com/basho-labs/riak-c-client and https://github.com/basho-labs/riak-cxx-client, but both are fairly outdated. Thanks, -rc

…

On Tue, Jul 7, 2020 at 5:53 PM Martin Sumner ***@***.***> wrote: Hard to comment, as I've not used the Redis add-on. However, if your aim is to minimise latency, then there are a number of network hops necessary to extract an object from Riak, that could be avoided by extracting an object direct from a Redis cache. So although all Riak backends try to keep active objects in cache (either in backend memory or page cache), an un-contended Redis lookup would still have a faster response time than a Riak GET. But please proceed with caution, if you hit problems you're unlikely to be able to find someone with experience of the Redis add-on to help. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#1768 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAQSEDENXIKABOT6SYH5JZ3R2NAIRANCNFSM4OPFUR6Q> .

[martinsumner]

For new versions of Riak we're not updating the Riak clients, other than the erlang clients. So I'm afraid if you want to use a client and keep it up to date, you will need to maintain it yourself.