convert MSSQL job to MySQL

[Craig Tompkins]

I have an application that dumps logs into 2 databases. They have been on MSSQL for years and I recently needed to move them to MySQL. In MSSQL 30 days worth of logs would be 150GB. So I had a job running at night that trimmed everything older than 30 days, then did a backup with truncate_only and a shrink log as such:
DELETE FROM ESSyslogMain WHERE recorddate < getdate()- 30
backup log syslog with truncate_only
DBCC SHRINKFILE(syslog_log, 1)

How can I accomplish this in MySQL?
DELETE FROM ESSyslogMain WHERE recorddate < curdate()- 30
seems to take care of the first line, but I'm stuck after that.

Can anyone tell me the code "conversion" for the 2nd and 3rd lines? Can anyone tell me how to schedule a job in MySQL? I have version 5.2.47CE of the workbench installed.
TIA
Craig