ZFS file systems are lightweight and can be encrypted, compressed, and configured with reserved space and disk space quotas.
The tmpfs file system can grow without bound. To prevent a denial of service (DoS) attack, complete How to Limit the Size of the tmpfs File System.
The following tasks configure a size limit for tmpfs and provide a glimpse of the protections that are available in ZFS, the default file system in Oracle Solaris. For additional information, see Setting ZFS Quotas and Reservations in Managing ZFS File Systems in Oracle Solaris 11.2 and the zfs(1M) man page.