question: whether to initialize filedescriptor lazily or not . if true , file descriptors are created only when data is going to be transferred . this can reduce the number of open files . concode_field_sep String SPARK_NETWORK_IO_NUMCONNECTIONSPERPEER_KEY concode_elem_sep String SPARK_NETWORK_IO_LAZYFD_KEY concode_elem_sep String SPARK_NETWORK_IO_SERVERTHREADS_KEY concode_elem_sep String module concode_elem_sep String SPARK_NETWORK_IO_CLIENTTHREADS_KEY concode_elem_sep String SPARK_NETWORK_IO_RETRYWAIT_KEY concode_elem_sep ConfigProvider conf concode_elem_sep String SPARK_NETWORK_SASL_TIMEOUT_KEY concode_elem_sep String SPARK_NETWORK_IO_PREFERDIRECTBUFS_KEY concode_elem_sep String SPARK_NETWORK_IO_RECEIVEBUFFER_KEY concode_elem_sep String SPARK_NETWORK_IO_MODE_KEY concode_elem_sep String SPARK_NETWORK_IO_BACKLOG_KEY concode_elem_sep String SPARK_NETWORK_IO_SENDBUFFER_KEY concode_elem_sep String SPARK_NETWORK_IO_MAXRETRIES_KEY concode_elem_sep String SPARK_NETWORK_IO_CONNECTIONTIMEOUT_KEY concode_field_sep int ioRetryWaitTimeMs concode_elem_sep String ioMode concode_elem_sep int serverThreads concode_elem_sep int receiveBuf concode_elem_sep int maxSaslEncryptedBlockSize concode_elem_sep int sendBuf concode_elem_sep int numConnectionsPerPeer concode_elem_sep int backLog concode_elem_sep int getInt concode_elem_sep boolean preferDirectBufs concode_elem_sep int clientThreads concode_elem_sep int portMaxRetries concode_elem_sep int connectionTimeoutMs concode_elem_sep int maxIORetries concode_elem_sep String getConfKey concode_elem_sep int memoryMapBytes concode_elem_sep boolean saslServerAlwaysEncrypt concode_elem_sep int saslRTTimeoutMs
target: boolean function ( ) { return conf . getBoolean ( SPARK_NETWORK_IO_LAZYFD_KEY , true ) ; }