在RAC环境上使用expdp进行逻辑备份时，报如下错误。

ORA-31693: Table data object ""."" failed to load/unload and is being skipped due to error:
ORA-31617: unable to open dump file "" for write
ORA-19505: failed to identify file ""
ORA-27037: unable to obtain file status
Solaris-AMD64 Error: 2: No such file or directory
Additional information: 3

使用的备份脚本是：

expdp  '"/ as sysdba"'  directory=DATA_PUMP_DIR  dumpfile=$FILENAME"1".dump,$FILENAME"2".dump,$FILENAME"3".dump logfile=$FILENAME.log  schemas=test,test2,test3   parallel=3 COMPRESSION=all

解决的方式：

1. Share/mount the dumpfile destination with all RAC nodes performing the expdp

- OR -

2. Use CLUSTER=N during Datapump so it will only run on the node which has the mount point and permissions to write to it.

我的方法是修改了expdp脚本，加如了  CLUSTER=N 参数。

expdp  '"/ as sysdba"'  directory=DATA_PUMP_DIR  dumpfile=$FILENAME"1".dump,$FILENAME"2".dump,$FILENAME"3".dump logfile=$FILENAME.log  schemas=test,test2,test3    CLUSTER=N  parallel=3 COMPRESSION=all

最后，备份成功。不在报错了。