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Subject [GitHub] [incubator-hudi] lamber-ken commented on issue #1253: [HUDI-558] Introduce ability to compress bloom filters while storing in parquet
Date Sat, 29 Feb 2020 04:03:54 GMT
lamber-ken commented on issue #1253: [HUDI-558] Introduce ability to compress bloom filters
while storing in parquet
URL: https://github.com/apache/incubator-hudi/pull/1253#issuecomment-592855749
 
 
   Hi @bvaradar, I test the pr, seems that the size of compressed bigger than original one.

   If wrong, correct me, thanks.
   
   ```
   test random keys
   original size: 4792548
   compress size: 4967672
   
   test sequential keys
   original size: 4792548
   compress size: 4967746
   ```
   ```
   SimpleBloomFilter filter = new SimpleBloomFilter(1000000, 0.000001, Hash.MURMUR_HASH);
   
   System.out.println("test random keys");
   for (int i = 0; i < 1000000; i++) {
     String key = UUID.randomUUID().toString();
     filter.add(key);
   }
   
   System.out.println("original size: " + filter.serializeToString().length());
   System.out.println("compress size: " + GzipCompressionUtils.compress(filter.serializeToString()).length());
   
   System.out.println("\ntest sequential keys");
   filter = new SimpleBloomFilter(1000000, 0.000001, Hash.MURMUR_HASH);
   
   for (int i = 0; i < 1000000; i++) {
     String key = "key-" + i;
     filter.add(key);
   }
   
   System.out.println("original size: " + filter.serializeToString().length());
   System.out.println("compress size: " + GzipCompressionUtils.compress(filter.serializeToString()).length());
   
   ```

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