WAAS - NFS AO故障排除
章節：排除NFS AO故障
本文描述如何對NFS AO進行故障排除。
指南目錄
主要文章
瞭解WAAS架構和流量
WAAS初步故障排除
故障排除最佳化
應用加速故障排除
排除CIFS AO故障
排除HTTP AO故障
排除EPM AO故障
排除MAPI AO故障
排除NFS AO故障
排除SSL AO故障
影片AO故障排除
通用AO故障排除
過載故障排除
WCCP故障排除
AppNav故障排除
磁碟和硬體故障排除
串列內聯群集故障排除
vWAAS故障排除
WAAS Express故障排除
排除NAM整合故障
主要文章
瞭解WAAS架構和流量
WAAS初步故障排除
故障排除最佳化
應用加速故障排除
排除CIFS AO故障
排除HTTP AO故障
排除EPM AO故障
排除MAPI AO故障
排除NFS AO故障
排除SSL AO故障
影片AO故障排除
通用AO故障排除
過載故障排除
WCCP故障排除
AppNav故障排除
磁碟和硬體故障排除
串列內聯群集故障排除
vWAAS故障排除
WAAS Express故障排除
排除NAM整合故障
目錄
NFS加速器故障排除
NFS加速器可最佳化NFSv3流量。其他NFS版本沒有通過NFS AO進行最佳化。
您可以使用show accelerator和show license命令驗證常規AO配置和狀態，如應用程式加速故障排除一文中所述。NFS加速器操作需要企業許可證。
接下來，使用show accelerator nfs命令驗證NFS AO的特定狀態，如圖1所示。您想看到NFS AO已啟用、正在運行和已註冊，而且顯示了連線限制。如果Config State為Enabled，但Operational State為Shutdown，則表示存在許可問題。
- 圖1.檢驗NFS加速器狀態
使用show running-config命令驗證NFS流量策略是否正確配置。您想檢視加速nfs檔案系統應用程式分類器NFS操作，並且想檢視NFS分類器列出的適當匹配條件，如下所示：
WAE674# sh run | include NFS
name File-System classifier NFS action optimize full accelerate nfs <-------------
WAE674# sh run | begin NFS
...skipping
classifier NFS
match dst port eq 2049 <-------------
exit
使用show statistics connection optimized nfs命令檢查WAAS裝置是否正在建立最佳化的NFS連線。驗證NFS連線的「加速」列中是否顯示「N」，這表示已使用NFS AO。
WAE674# sh stat conn opt nfs D:DRE,L:LZ,T:TCP Optimization, C:CIFS,E:EPM,G:GENERIC,H:HTTP,M:MAPI,N:NFS,S:SSL,V:VIDEO, ConnID Local IP:Port Remote IP:Port PeerID Accelerator 582 10.56.94.101:33606 10.56.94.80:2049 0:1a:64:d3:2f:b8 NTDL <-----Look for "N"
使用show statistics accelerator nfs命令驗證以下內容：
- NFS流量是NFSv3。請檢視「每個NFS版本的RPC呼叫總數」欄位。該欄位的輸出是一個由5個值組成的陣列，並且您希望看到大多數的NFSv3流量，此流量在第4個計數器中報告。其他陣列位置中的數字高表示其他NFS版本。
- NFS流量未加密。檢視Total RPC Calls per Authentication Flavor欄位。該欄位的輸出是一個由4個值組成的陣列，您希望看到大部分未加密的流量，這些流量對應於前3個計數器。最後一個計數器中的大數字表示加密的NFS流量。另請選中Total RPC Calls with Unknown Authentication Flavor欄位，您想在其中看到0或較小的數字，因為這些連線未最佳化。
- NFS連線是非同步的。驗證「本地服務請求百分比」欄位為非零。
WAE# sh statistics accelerator nfs NFS: Global Statistics ----------------- Time Accelerator was started: Fri Oct 23 16:40:06 2009 Time Statistics were Last Reset/Cleared: Fri Oct 23 16:40:06 2009 Total Handled Connections: 170 Total Optimized Connections: 170 Total Connections Handed-off with Compression Policies Unchanged: 0 Total Dropped Connections: 0 Current Active Connections: 0 Current Pending Connections: 0 Maximum Active Connections: 13 Total RPC Calls per Authentication Flavor: 65 298544 0 0 <----Should see 0 or few in last field Total RPC Calls with Unknown Authentication Flavor: 0 <----Should see 0 or few Total RPC Calls per NFS Version: 0 0 0 298609 0 <----Should see 0 or few in first two and last fields Total RPC Calls with Unknown NFS Version: 0 <----Should see 0 or few Total Requests: 298609 Total Local Replies: 191713 Percentage of Requests Served Locally: 64 <----Should be nonzero Percentage of Requests Served Remotely: 36 Average Time to Generate Local READ Reply (ms): 15 Average Time to Generate Local WRITE Reply (ms): 0 Average Time to Generate Local GETATTR Reply (ms): 0 Average Time to Generate Local Reply (ms): 0 Average Time to Receive Remote Reply (ms): 10 Meta-Data Cache Access Count: 206017 Meta-Data Cache Hit Count: 191673 Remaining Number Of Entries in Meta-Data Cache: 128926 Meta-Data Cache Hit Ratio: 93
可以使用show statistics connection optimized nfs detail命令檢視NFS連線統計資訊，如下所示：
WAE674# show stat conn opt nfs detail
Connection Id: 1916
Peer Id: 00:14:5e:84:24:5f
Connection Type: EXTERNAL CLIENT
Start Time: Thu Jun 25 07:09:09 2009
Source IP Address: 10.10.10.20
Source Port Number: 928
Destination IP Address: 10.10.100.102
Destination Port Number: 2049
Application Name: File-System <-----Should see File-System
Classifier Name: NFS <-----Should see NFS
Map Name: basic
Directed Mode: FALSE
Preposition Flow: FALSE
Policy Details:
Configured: TCP_OPTIMIZE + DRE + LZ
Derived: TCP_OPTIMIZE + DRE + LZ
Peer: TCP_OPTIMIZE + DRE + LZ
Negotiated: TCP_OPTIMIZE + DRE + LZ
Applied: TCP_OPTIMIZE + DRE + LZ
Accelerator Details:
Configured: NFS <-----Should see NFS configured
Derived: NFS
Applied: NFS <-----Should see NFS applied
Hist: None
Original Optimized
-------------------- --------------------
Bytes Read: 5120 4639
Bytes Written: 28136 1407
. . .
NFS : 1916
Time Statistics were Last Reset/Cleared: Thu Jun 25
07:09:09 2009
Total Bytes Read: 5120
28136
Total Bytes Written: 28136
5120
Bit Flags for I/O state: 19
Histogram of Buffers Read From Local Endpoint: 31
1 0 0 0
Total NFS Requests: 32
Total Replies Served Locally: 4
Percentage of Requests Served Locally: 12
Percentage of Requests Served Remotely: 88
Average Time to Generate Local READ Reply (ms): 0
Average Time to Generate Local WRITE Reply (ms): 0
Average Time to Generate Local GETATTR Reply (ms): 0
Average Time to Generate Local Reply (ms): 0
Average Time to Receive Remote Reply (ms): 103
Total RPC Procedure Calls: 0
9 0 10 7 0 4 1 0
0 0 0 0 0 0 0 0
1 0 0 0 0
. . .
Total Unknown RPC Procedure Calls: 0
Total Write RPCs Using Stable-how Enumerated Values: 0
0 1
Total WRITE RPCs with Invalid Stable-how Value: 0
Bytes Buffered for READ Purpose: 0
Start Time of Session: Thu Jun 25
07:09:09 2009
Meta-Data Cache Access Count: 9
Meta-Data Cache Hit Count: 4
Remaining Number Of Entries in Meta-Data Cache: 1000
Meta-Data Cache Hit Ratio: 44
Current number of entries in Meta-Data Cache: 0
. . .
NFS AO日誌記錄
以下日誌檔案可用於排除NFS AO問題：
- 事務日誌檔案：/local1/logs/tfo/working.log(和/local1/logs/tfo/tfo_log_*.txt)
- 調試日誌檔案：/local1/errorlog/nfsao-errorlog.current（和nfsao-errorlog.*）
為了更輕鬆地進行調試，您應該首先設定ACL以限制資料包只訪問一台主機。
WAE674(config)# ip access-list extended 150 permit tcp host 10.10.10.10 any WAE674(config)# ip access-list extended 150 permit tcp any host 10.10.10.10
要啟用事務日誌記錄，請使用transaction-logs configuration命令，如下所示：
wae(config)# transaction-logs flow enable wae(config)# transaction-logs flow access-list 150
您可以使用type-tail命令檢視事務日誌檔案的結尾。
要設定和啟用NFS AO的調試日誌記錄，請使用以下命令。
附註：調試日誌記錄是CPU密集型，可以生成大量輸出。在生產環境中慎重而謹慎地使用它。
您可以按如下方式啟用磁碟的詳細日誌記錄：
WAE674(config)# logging disk enable WAE674(config)# logging disk priority detail
您可以在ACL中啟用連線的調試日誌記錄，如下所示：
WAE674# debug connection access-list 150
NFS AO調試選項如下：
WAE674# debug accelerator nfs ? all enable all accelerator debugs async-write enable async write optimization debugs attributes-cache enable attributes-cache optimization debugs nfs-v3 enable NFSv3 layer debugs read-ahead enable read ahead optimization debugs rpc enable RPC layer debugs shell enable shell (infra) debugs utils enable utils debugs
您可以為NFS連線啟用調試日誌記錄，然後按如下方式顯示調試錯誤日誌的結束：
WAE674# debug accelerator nfs all WAE674# type-tail errorlog/nfsao-errorlog.current follow
意見