|The "sessionlog" directive is used on the Provider to keep a small history of entires that have been deleted in between replications. Because of the nature of Sync Replication, deleted entries are hard to discover without a history of deleted entries being stored on the Provider. However replication will still occurr without the sessionlog (just not as efficiently). The directive has the following format:
sessionlog <rid> <changelimit>
rid = an arbitrary Replication ID. It must be 3 digits or less. '1' works. This should match between the Provider and Consumer configs (1st argument for syncrepl on Consumer).
changelimit = this represents the number of deleted entries to keep track of. For example of you replicate every 5 minutes and you don't think you'll have over 100 deleted entries in that period then 100 would be a good number to use