Github user keith-turner commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/256#discussion_r115293480
--- Diff:
core/src/main/java/org/apache/accumulo/core/file/blockfile/cache/LruBlockCache.java
---
@@ -84,7 +85,7 @@
static final int statThreadPeriod = 60;
/** Concurrent map (the cache) */
- private final ConcurrentHashMap<String,CachedBlock> map;
--- End diff --
One more thought.. may want to have an enum cache type.
```java
enum CacheType {
INDEX,
DATA,
SUMMARY
}
```
Then the factory could key use this.
```java
public interface BlockCacheFactory {
/**
* TODO document how this can utilize the new arbitrary instance config
*/
public BlockCache getBlockCache(CacheType ct, AccumuloConfiguration conf);
}
```
Then the implementation could use this for differentiated config.
```java
public class SuperDuperBlockCacheFactory implement BlockCacheFactory {
public BlockCache getBlockCache(CacheType ct, AccumuloConfiguration
conf) {
long knob42 = conf.getMemory("general.custom."+ct.name()+".knob42");
//read whatever is needed from config in local vars
return new SuperDuperBlockCacheFactory(knob42);
}
}
```
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