sofa-jraft
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RFC: multi-generation log cache
RFC: multi-generation log cache
As discussion in #840 , jraft keeps a cache for latest log entries, it's unlimited and may consume too much memory under write-heavy workload or catching up replication when node restarts.
I think we can abstracts a cache interface and provide a multi-generation cache to replace current one:
- Gen-1: totaly in memory with limited capacity.
- Gen-2: Off-heap cache.When Gen-1 overflows, move the LRU(least recently used) item into off-heap cache such as OHC.
Main goals:
- Abstracts log cache interface.
- Provide a multi-generation cache implementation.
@killme2008 hi，I have some Off-heap cache experience before ，and I accept issue #856 ，but the programme wait to discuss,so I want to do this first,and I have time do them together，can you assign me?
@HHoflittlefish777 Of course, it's yours, feel free to try and discuss with us in slack.
@HHoflittlefish777 Of course, it's yours, feel free to try and discuss with us in slack.
Thanks ,I will discuss in slack later
@killme2008 Hi，I ask some question in slack yesterday,hope to be given a answer if have time.
@HHoflittlefish777 do not have time to impl this feature, it's open for any developers that are interested in it.
@killme2008 @hzh0425 Hello, I'm learning MIT 6.824 Course now, and I've passed the Lab2 in which I implemented Raft. I am not so familiar with JVM. But whatever, I want to have a try. Can you assign me?
@killme2008 @hzh0425 Hello, I'm learning MIT 6.824 Course now, and I've passed the Lab2 in which I implemented Raft. I am not so familiar with JVM. But whatever, I want to have a try. Can you assign me?
Sure, already assigned to you @RockRockWhite
