Plugin command to move streaming data from
stdin to the remote storage system.
<plugin_executable> backup_data <plugin_config_file> <data_filenamekey>
gpbackup invokes the
backup_data plugin command on each segment host during a streaming backup.
backup_data implementation should read a potentially large stream of data from
stdin and write the data to a single file on the remote storage system. The data is sent to the command as a single continuous stream per Greenplum Database segment. If
backup_data modifies the data in any manner (i.e. compresses),
restore_data must perform the reverse operation.
Name or maintain a mapping from the destination file to
data_filenamekey. This will be the file key used for the restore operation.
backup_data command must exit with a value of 0 on success, non-zero if an error occurs. In the case of a non-zero exit code,
gpbackup displays the contents of
stderr to the user.