Tow question for skywalking

[dafang]

hi god.wu:
I wanna to know, the Progress of 8.0 version in skywalking. Because I want to 
update my prod env, and very urgent.
Another seek help, is how the collector cache working,could you please tell me 
the accurate java class?
Thank you very much,and wait for your reply~
dafang.wang
01.06.2020