
140 High Performance Parallel I/O
FIGURE 11.3: Single file system starting at the root inode /ifs.
partitioning, and no need for volume creation. Instead of limiting access to free
space and to non-authorized files at the physical volume level, OneFS provides
for the same functionality in software via share and file permissions, and via
the SmartQuotas service, which provides directory-level quota management.
Because all information is shared among nodes across the internal network,
data can be written to or read from any node, thus optimizing performance
when multiple users are concurrently reading and writing to the same set of
data.
Figure 11.3 illustrates ...