Otter

In Alibaba B2B company, because of the characteristics of the business, the sellers are mainly concentrated in the country, and the buyers are mainly concentrated in foreign countries, so it has derived the demand for the computer room in Hangzhou and the United States. At the same time, in order to improve the user experience, the structure of the entire computer room is double-A Both can be written, and thus a product like otter was born. The first version of otter can be traced back to 2004~05. The external open source version is the fourth version. The development time has continued from July 2011 to the present. At present, the synchronization requirements of local/remote computer rooms within Alibaba B2B are basically complete. Got otte4. Based on database incremental log analysis, quasi real-time synchronization to the mysql/oracle database in the local computer room or remote computer room. A distributed database synchronization system.