read-backup-data: near cache should not be used ??

[rob van der boom]

Hey, 

I do read some differences between performance near-cache or read-backupdata.

But i don't find information if it can be used together ?


In the hazelcast-default.xml configuration there is a comment after read-backupdata telling:
"<!-- near cache must not be used -->"

Does this mean near cache can not be used together with read backup data ?

Hope anyone can explain.

[ahmet mırçık]

Hi, 

If the subject is client side near-cache, read-backup data has no effect.

But if you are asking for server-side near-cache, map.get api call first looks up near-cache 

and if data is not there it checks backup-replica then if it still doesn't find data, it goes to the primary-replica of partition data.

Hope this clarifies the mechanism.

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Ahmet Mırçık

[rob van der boom]

aaa thx, that makes sense , thanks that answers question, it was about client side.  So near cache is active there and read-backup doesn't interfere..

Op maandag 12 december 2022 om 16:46:47 UTC+1 schreef ahmet...@gmail.com: