enable read cache

other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java

@@ -15,7 +15,7 @@ public class SeaweedRead {
 
     private static final Logger LOG = LoggerFactory.getLogger(SeaweedRead.class);
 
-    static ChunkCache chunkCache = new ChunkCache(0);
+    static ChunkCache chunkCache = new ChunkCache(4);
 
     // returns bytesRead
     public static long read(FilerGrpcClient filerGrpcClient, List<VisibleInterval> visibleIntervals,

other/java/client/src/main/java/seaweedfs/client/SeaweedWrite.java

@@ -61,9 +61,6 @@ public class SeaweedWrite {
 
         String etag = multipartUpload(targetUrl, auth, bytes, bytesOffset, bytesLength, cipherKey);
 
-        // cache fileId ~ bytes
-        SeaweedRead.chunkCache.setChunk(fileId, bytes);
-
         LOG.debug("write file chunk {} size {}", targetUrl, bytesLength);
 
         return FilerProto.FileChunk.newBuilder()