The following relates to all versions of DXSpider and is not platform related.
Login as sysop and create a file in /spider/local_cmd called crontab. Edit it with your favourite editor and add a line like this (I have included a comment)
# check every 10 minutes to see if gb7xxx is connected and if not
# start a connect job going
0,10,20,30,40,50 * * * * start_connect('gb7xxx') if unless connected('gb7xxx')
The callsign involved will be the callsign of the cluster node you are going to connect to. This will now check every 10 minutes to see if gb7xxx is connected, if it is then nothing will be done. If it is not, then a connect attempt will be started.
There are probably lots of other things you could use this crontab file for. If you want to know more about it, look at the DXSpider website at the cron page where it is explained more fully.