Owner's manual

OSS File Synchronization
HP AutoSYNC User’s Guide—522580-015
5-2
Source File Set
To protect the destination file set from loss of integrity in case of system or component
outages, AutoSYNC performs the following steps when synchronizing a file or
directory:
1. The file or directory is first created with the destination filename plus a temporary
name extension ZASYnnnn where nnnn is a number.
2. Data is written to the file.
3. When the synchronization of the file has completed, the old destination file or
directory is deleted and the new destination file or directory is renamed to its final
name without the temporary name extension.
If a synchronization fails, AutoSYNC deletes the temporary file or directory and the old
file or directory remains in place.
Source File Set
The source file set must describe only local files. If the source file set contains a node
name (for example /E/PARIS), the node name must be the local node.
Guardian files cannot be synchronized with their OSS pathname, that is using the /G
directory. Use the regular Guardian naming when synchronizing Guardian files.
Destination File Set
The destination file set may be either on the local node or a remote node; specify a
remote destination file set with the Expand identifier and the node name (/E/PARIS)
followed by the absolute pathname.
Unlike Guardian file sets, specifying system name back slash asterisk (\*) as the
destination node to synchronize a file set to all nodes in the network is not supported
for OSS file sets. You cannot specify /E/* as the destination node name for OSS files.
Purging Destination Files
If a file, a link or a directory exists in the destination file set but does not exist in the
source, it can be purged on the destination by specifying the PURGE option.
If PURGE is specified, subordinate directories that do not exist in the source are
purged. This differs from the purge processing for Guardian subvolumes. Entire
Guardian subvolumes are purged only if the PURGESUBVOL option is specified in
addition to the PURGE option.
Excluded Files and PURGE
EXCLUDE does not apply to the destination system. AutoSYNC purges extra files or
directories that do not exist on source system, even if they have been listed in the
exclude file specified with the EXCLUDE option.