I have seen that page. But I could not find any information on whether 1.5 version supports server clustering. My immediate migration to higher version depends on that decision. Please let me know.
You can configure a quartz cluster using JDBCJobStore or Terracota JobStore. In case of the former, the job information is stored in a DB where as in case of the latter, it is stored in Terracotta.
This will get you started
One more question - I saw on one of the Quartz link that they recommend 1.7 and higher version with Terracotta latest version. Is it OK to use Quartz 1.5 with the latest terracotta version ?