Filesystems comparison using iozone

Filesystems comparison using iozone:

"Write (write):

This test measures the performance of writing a new file. When a new file is written not only does the data need to be stored but also the overhead information for keeping track of where the data is located on the storage media. This overhead is called the metadata It consists of the directory information, the space allocation and any other data associated with a file that is not part of the data contained in the file. It is normal for the initial write performance to be lower than the performance of rewriting a file due to this overhead information."