有关sybase数据库同步问题
环境：两台linux 4.7服务器，安装相同版本的sybase ASA 9数据库
问题：原来两个数据库之间配置了MobiLink同步。后来发现.log文件达到9G，为防止数据库宕机，在主备两台机器上执行backup database directory '/opt/sybase/SYBSsa9/backup' transaction log truncate
之后同步失效，不得已重新配置MobiLink同步，先停掉主备上所有业务，把主机上的db和log复制到备机上，然后开始配置同步，备机上的同步服务却怎么也起不来，查看运行日志发现错误如下：
I. 05/11 16:48:29. Disconnecting from remote database
I. 05/11 16:48:29. Next sync scheduled on May 11 04:51:00pm
I. 05/11 16:48:29. Log scan starting at offset 0044768263
I. 05/11 16:48:29. Processing transaction logs from directory "/opt/sybase/SYBSsa9/"
E. 05/11 16:48:29. No off-line transaction log file found and on-line transaction log starts at offset 010413537789.
I. 05/11 16:48:29. We are looking for a transaction log file starting at offset 0044768263.
I. 05/11 16:48:29. Discarded memory to be recovered at next complete rescan: 0 bytes.
I. 05/11 16:48:29. Complete log scan required.
I. 05/11 16:48:29. Synchronization completed
E. 05/11 16:48:29. SQL statement failed: (-101) Not connected to a database
请教版本和大侠。是什么问题导致的？如何解决？谢谢了。
[解决办法]
backup database directory '/opt/sybase/SYBSsa9/backup' transaction log truncate
同步复制技术要用到transaction log，怎么能truncate呢，这个是错误根源。
