主库: 只要有新的重做日志产生,LGWR进程将触发LNSn(Log Network Server)进程把新生成的重做日志传输到备库(如果配置了3个备库,则有3个LNS进程)。 ASYNC是redo buffer保存到 online redo log后,LNSn才开始传输 备库: RFS进程负责接收日志。接收到日志后将其写入standby重做日志,如果备库开启了实时应用,就立即做...
Network Structure and Loss function Network Structure 1.结构中basic elements appearance encoder:由resnet_50修改而来,提取输入图片的appearance code(一种特征),同时还是re-id的backbone 。其输入是[b,3,256,128] 4-D tensor(b代表batch-size), 输出有两部分,A:[b,2048,4,1]4-D tensor,用于给structure...
当主库的某些日志没有成功传送到备库,那么这时候就发生了归档裂缝(Archive Gap)。目前Oracle提供了两种日志GAP的检测和处理机制,分别是自动GAP处理(Automatic Gap Resolution)和FAL进程GAP处理(FAL Gap Resolution)。自动GAP处理即主库上的ARCn进程会每分钟检查备库上的日志GAP情况并做相应处理。FAL(Fetch Archive Log...
1 1、 监听、TNS配置路径 2 $ORACLE_HOME/network/admin 3 2、 监听配置 4 SID_LIST_oradb = 5 (SID_LIST = 6 (SID_DESC = 7 (GLOBAL_DBNAME = oradb) 8 (ORACLE_HOME = $ORACLE_HOME) 9 (SID_NAME = oradb) 10 ) 11 ) 12 13 oradb = 14 (DESCRIPTION = 15 (ADDRESS = (PROTOCOL = TC...
网络心跳(Network Hearbeat)是RAC的内部通信机制,每隔一秒钟,CSSD的一个线程(sending进程)发送一个TCP网络心跳包给自己和集群中的其他节点,同时CSSD的另外一个进程(receiving进程)接收到心跳。如果网络传输包被drop或者出现错误,那么TCP的错误纠正机制会重传这个数据包,Oracle在这种场景下不参与网络包的重传。如果一个节点...
1)Primary Database 产生的Redo 日志要同时写道日志文件和网络。也就是说LGWR进程把日志写到本地日志文件的同时还要发送给本地的LNSn进程(Network Server Process),再由LNSn(LGWR Network Server process)进程把日志通过网络发送给远程的目的地,每个远程目的地对应一个LNS进程,多个LNS进程能够并行工作。
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分布式电源(DG)大规模并网不仅带来了消纳问题,还使交直流网络的经济安全运行面临巨大挑战。基于此,文中提出一种基于DG选址和多端电压源换流器(VSC)协调控制的交直流混合配电网优化运行方法。针对DG选址,基于灵敏度分析方法提出一种节点...
2 $ORACLE_HOME/network/admin 3 2、 监听配置 4 SID_LIST_oradb = 5 (SID_LIST = 6 (SID_DESC = 7 (GLOBAL_DBNAME = oradb) 8 (ORACLE_HOME = $ORACLE_HOME) 9 (SID_NAME = oradb) 10 ) 11 ) 12 13 oradb = 14 (DESCRIPTION = ...