Weekend Learning: How ZFS calculates used space

If you are running an Exadata solution, or other Big Data type installations from Oracle, then you are probably familiar with the ZFS appliance but do you "Understanding How ZFS Calculates Used Space"?  Visit My Oracle Support note ID 1369456.1 to get all the details and find out how using the du and df commands do not get you accurate estimates on a ZFS platform!

Weekend Learning: Calculating file sizes

While you may be saying, I know how to use the du command just fine, so what can I learn this weekend?  Well, visit My Oracle Support article "How to Calculate File Sizes on a Specific File System" from document ID 1986163.1 to learn how to extend the command to get file sizes measured for hidden files/directories or some files that have been mounted in other ways.