从 Hazelcast Map 读取值列表的最有效方法

Question

We are using Hazelcast as a cache and want to read a list of 50 items from a single map. Currently we are seeing quite a long delay reading this list ~20ms. Reading a single entry is extremely quick but it seems this is scaling quite badly. I have tried using the Imap methods of

• .getAll(setOfKeys)
• Iterating the list and calling .get(singleKey) for each one
• Iterating the list and calling .getAsync(singleKey) and then iterating the list of futures getting them

Is there a better way to do this or do I need to rethink the way we are caching/using Hazelcast to reduce the get call on the map to a single call somehow.

Few bits of additional info

• The total number of items in the map is ~35,000
• The size of all items is ~350MB with each entry being ~10kb
• I am running this embedded into the JVM in a Spring Boot application on my local machine
• The call on HazelcastInstance.getMap(mapName) is taking less than 1ms

Answer 1

I guess it depends a lot on the exact setup, but from your question, it looks as you didn't try entrySet() .

I believe that would be the fastest.