NFS在FlexGroup 上执行其他操作时出现偶发性高延迟
适用场景
- ONTAP 9
- FlexGroup
- NFSv3
- RAL (远程访问层)
问题描述
- 遍历大型目录的延迟较长—NFSv3查找请求和READDIR/READDIRPLUS请求的延迟较长。
- 高延迟可能高达几秒、具体取决于监控工具以及报告延迟的频率。
wafl.readdir.expired在EMS日志中观察到：
Tue Jun 21 05:02:10 CST [<node_name>: wafl_exempt00: wafl.readdir.expired:error]: A READDIR file operation has expired for the directory associated with volume fg1__0084/@vserver:5edc27ba-4d55-11ea-b14d-d039ea425425 Snapshot copy ID 0 and inode 4348458.
Nblade.nfsLongRunningOp在EMS日志中观察到：
Tue Jun 21 03:39:50 CST [<node_name: kernel: Nblade.nfsLongRunningOp:debug]: Detected a long running network process operation. The client IP address:port is 10.239.42.xx:912. The local IP address:port is 10.239.0.x:2049. The protocol requesting the operation is NFS3. The RPC Program Number for the operation is 100003. The RPC Procedure Number for the operation is 8. The disk process UUID is 127db8734c7211eaadfbd039ea4251d9. The Vserver identifier is 9.