Expdp To NFS Server Share From AIX Hangs Due to Incompatible "-vers"
Last updated on FEBRUARY 06, 2017
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
IBM AIX on POWER Systems (64-bit)
• EXPDP din't not progress and nothing was reported in the export log file. The job status showed "DEFINING".
(please refer Doc ID 1448360.1 for more details about different STATUS states of the datapump job)
• At the same time, RMAN and the conventional export (EXP) to the same NFS mount point were working fine. Also EXPDP to the local disk worked fine.
• No invalidation in any of the registry components/ datapump related packages
• The mount options used are as per Doc ID 359515.1.
• Event 10298 (event 10298 disables the NFS checks) was set but that didn't help.
(Refer Doc ID 1518979.1, Doc ID 420582.1 for more details about event 10298).
• There was no NFS ODM line in alert log during the instance start up, which means Oracle ASM DNFS was not used.
• Oracle ASM Cluster File System (ACFS) was not being used.
• It was confirmed that the NFS server share was from AIX 7.1 and storage was IBM DS8700 SAN storage behind.
Oracle Direct NFS (dNFS) is an optimized NFS (Network File System) client that provides faster and more scalable access to NFS storage located on NAS
storage devices (accessible over TCP/IP). Direct NFS is built directly into the database kernel - just like ASM which is mainly used when using DAS or
ACFS is a general purpose cluster file system implemented as part of ASM. It can be used to store almost anything, including the database executables. The only things that should not be stored in ACFS are the Grid Infrastructure home and any Oracle files that can be directly stored in Oracle ASM.
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