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From: keith-turner <git@git.apache.org>
To: dev@accumulo.apache.org
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References: <git-pr-256-accumulo@git.apache.org>
In-Reply-To: <git-pr-256-accumulo@git.apache.org>
Subject: [GitHub] accumulo pull request #256: ACCUMULO-4463: Make block cache implentation con...
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Message-Id: <20170508211750.94F32DFBC8@git1-us-west.apache.org>
Date: Mon,  8 May 2017 21:17:50 +0000 (UTC)
archived-at: Mon, 08 May 2017 21:17:52 -0000

Github user keith-turner commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/256#discussion_r115355497
  
    --- Diff: server/tserver/src/main/java/org/apache/accumulo/tserver/TabletServerResourceManager.java ---
    @@ -175,19 +176,27 @@ public TabletServerResourceManager(TabletServer tserver, VolumeManager fs) {
         long sCacheSize = acuConf.getAsBytes(Property.TSERV_SUMMARYCACHE_SIZE);
         long totalQueueSize = acuConf.getAsBytes(Property.TSERV_TOTAL_MUTATION_QUEUE_MAX);
     
    -    String policy = acuConf.get(Property.TSERV_CACHE_POLICY);
    -    if (policy.equalsIgnoreCase("LRU")) {
    -      _iCache = new LruBlockCache(iCacheSize, blockSize);
    -      _dCache = new LruBlockCache(dCacheSize, blockSize);
    -      _sCache = new LruBlockCache(sCacheSize, blockSize);
    -    } else if (policy.equalsIgnoreCase("TinyLFU")) {
    -      _iCache = new TinyLfuBlockCache(iCacheSize, blockSize);
    -      _dCache = new TinyLfuBlockCache(dCacheSize, blockSize);
    -      _sCache = new TinyLfuBlockCache(sCacheSize, blockSize);
    -    } else {
    -      throw new IllegalArgumentException("Unknown Block cache policy " + policy);
    +    BlockCacheFactory factory;
    +    try {
    +      factory = BlockCacheFactory.getBlockCacheFactory(acuConf);
    +    } catch (Exception e) {
    +      throw new RuntimeException("Error creating Block Cache Factory", e);
         }
     
    +    ConfigurationCopy copy = new ConfigurationCopy(acuConf);
    +    copy.set(BlockCacheConfiguration.BLOCK_SIZE_PROPERTY, Long.toString(blockSize));
    +    copy.set(BlockCacheConfiguration.MAX_SIZE_PROPERTY, Long.toString(iCacheSize));
    --- End diff --
    
    Also, putting the CacheType i the factory API allows the user to tune the cache differently for index vs data vs summary.  For example if my cache impl has 5 tuning parameters, I may want to set tune differently for index vs data cache.


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