High network traffic is seen on the Ethernet or FCP, but from sysstat output, the disk read throughput is very low. The file contains holes that do not occupy any disk space, but if the client reads t...High network traffic is seen on the Ethernet or FCP, but from sysstat output, the disk read throughput is very low. The file contains holes that do not occupy any disk space, but if the client reads the entire file, Write Anywhere File Layout (WAFL) will transfer a stream of 0x00 to the client. So if an IO request is issued on a client to read the newly created LUN, for example, raw device traffic on the network will be seen as very high but the disk read is almost zero.
