在一些情况下,我们会遇到某些原因,在源端和目标端部署不同版本的ogg,如果是目标端版本高于源端版本,一般没有问题,但是如果源端版本较高,需要考虑在抽取和传输进程中加上类似这样的配置

EXTTRAIL <trail file>, FORMAT RELEASE 11.2
 
RMTTRAIL <trail file>, FORMAT RELEASE 11.2

需要注意ogg 19版本设置FORMAT RELEASE 参数最低只能12.2,否则就会出现类似报错,导致进程无法启动

2024-12-05 15:06:59  INFO    OGG-02089  Source redo compatibility version is: 19.0.0.

2024-12-05 15:06:59  INFO    OGG-00546  Default thread stack size: 10485760.

Source Context :
  SourceModule     : [er.redo.ora]
  SourceID         : [er/redo/oracle/redoora.c]
  SourceMethod     : [validateOutTrailFileCompatibility]
  SourceLine       : [6931]
  ThreadBacktrace  : [15] elements
                   : [/ogg/libgglog.so(CMessageContext::AddThreadContext())]
                   : [/ogg/libgglog.so(CMessageFactory::CreateMessage(CSourceContext*, unsigned int, ...))]
                   : [/ogg/libgglog.so(_MSG_String_String(CSourceContext*, int, char const*, char const*, CMessageFactory::MessageDisposition))]
                   : [/ogg/extract()]
                   : [/ogg/extract(RedoAPI::createInstance(ggs::gglib::ggdatasource::DataSource*, ggs::gglib::ggapp::ReplicationContext*))]
                   : [/ogg/extract(ggs::er::OraTranLogDataSource::setup())]
                   : [/ogg/extract(ggs::gglib::ggapp::ReplicationContext::establishStartPoints(char, ggs::gglib::ggdatasource::DataSourceParams c
onst&))]
                   : [/ogg/extract(ggs::gglib::ggapp::ReplicationContext::initializeDataSources(ggs::gglib::ggdatasource::DataSourceParams&))]
                   : [/ogg/extract()]
                   : [/ogg/extract(ggs::gglib::MultiThreading::MainThread::ExecMain())]
                   : [/ogg/extract(ggs::gglib::MultiThreading::Thread::RunThread(ggs::gglib::MultiThreading::Thread::ThreadArgs*))]
                   : [/ogg/extract(ggs::gglib::MultiThreading::MainThread::Run(int, char**))]
                   : [/ogg/extract(main)]
                   : [/lib64/libc.so.6(__libc_start_main)]
                   : [/ogg/extract()]

2024-12-05 15:06:59  ERROR   OGG-02246  Source redo compatibility level 19.0.0 requires trail FORMAT 12.2 or higher.

2024-12-05 15:06:59  ERROR   OGG-01668  PROCESS ABENDING.

出现这个问题主要是从oracle 12.2开始引入了BigSCN机制,基于目前客户比较常见的数据库版本,最可能出现这类问题的是:源端19c版本数据库,目标端是11.2版本数据库.对于这类同步需求,可以在目标端也部署19版本ogg for 11.2数据库版本来解决