EXCLUDESYNC syntax

EXCLUDESYNC $<$path$>$

[-c class[,class]...] [-n node[,node]...] [-p property[,property]...]

Specifies files/directories that should not be synchronized with the master image when sync-node (section 6.6) is run.
Note: This directive is only applicable to diskful nodes.

• - path specifies a file or directory that should not be synced.
• -c limits the directive to apply only to the given classes.
• -n limits the directive to apply only to the given nodes.
• -p limits the directive to apply only to nodes having one or more of the given properties.

Network filesystems mounted on a node are automatically excluded, so those directories do not need EXCLUDESYNC directives. However, any SAN filesystem that presents itself to the OS as block device (eg: fiber-channel and iSCSI) will likely need one.

This is crucial for diskful nodes mounting filesystems from any storage that appears to the system as a local device. Any attempt to synchronize that mountpoint would synchronize it with the (probably empty) directory in the master image, possibly resulting in data loss.