/**
     * Default target number of send credits
     */
    public static final int DEFAULT_SEND_CREDIT_TARGET = 32;

    /**
     * Default maximum receive size (8KB)
     */
    public static final int DEFAULT_MAX_RECEIVE_SIZE = 8192;

    /**
     * Default maximum fragmented size (128KB)
     */
    public static final int DEFAULT_MAX_FRAGMENTED_SIZE = 131072; // 128KB

        assertEquals("auto", config.getRdmaProvider(), "Default provider should be auto");
        assertEquals(8192, config.getRdmaReadWriteThreshold(), "Default threshold should be 8KB");
        assertEquals(65536, config.getRdmaMaxSendSize(), "Default max send size should be 64KB");
        assertEquals(65536, config.getRdmaMaxReceiveSize(), "Default max receive size should be 64KB");

            RdmaMemoryRegion sendBuffer = bufferManager.getSendRegion(8192);
            assertNotNull(sendBuffer, "Send buffer should be allocated");
            assertTrue(sendBuffer.getSize() >= 8192, "Send buffer should be at least 8KB");

            RdmaMemoryRegion recvBuffer = bufferManager.getReceiveRegion();
            assertNotNull(recvBuffer, "Receive buffer should be allocated");

public String getRdmaProvider() {
    return getProperty(RDMA_PROVIDER, "auto");  // auto, disni, jxio, tcp
}

public int getRdmaReadWriteThreshold() {
    return getIntProperty(RDMA_READ_WRITE_THRESHOLD, 8192);  // 8KB
}

public int getRdmaMaxSendSize() {
    return getIntProperty(RDMA_MAX_SEND_SIZE, 65536);  // 64KB
}

public int getRdmaMaxReceiveSize() {
    return getIntProperty(RDMA_MAX_RECEIVE_SIZE, 65536);  // 64KB

        if (this.rdmaProvider == null) {
            this.rdmaProvider = "auto";
        }
        if (this.rdmaReadWriteThreshold == 0) {
            this.rdmaReadWriteThreshold = 8192; // 8KB
        }
        if (this.rdmaMaxSendSize == 0) {
            this.rdmaMaxSendSize = 65536; // 64KB
        }
        if (this.rdmaMaxReceiveSize == 0) {
            this.rdmaMaxReceiveSize = 65536; // 64KB

      throws IOException {
    // Roughly size to match what has been read already. Some file systems, such as procfs, return 0
    // as their length. These files are very small, so it's wasteful to allocate an 8KB buffer.
    int initialBufferSize = min(BUFFER_SIZE, max(128, Integer.highestOneBit(totalLen) * 2));
    // Starting with an 8k buffer, double the size of each successive buffer. Smaller buffers