メインコンテンツまでスキップ

シングルディスクIOメディアエラーが原因でNFSレイテンシが高くなります

Views:
2
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
perf<a>2009565498</a>
Last Updated:

環境

  • ONTAP 9
  • NFS

問題

  • 複数のボリュームで高レイテンシが報告されています。 

2009565498 -ホスト側latency.png

  • レイテンシが高い期間にEMSに次のメッセージが表示されます

Sun May 07 12:00:34 +0000 [node01: disk_server_1: disk.ioMediumError:notice]: Medium error on disk 2a.15.23: op 0x2a:02352e00:0200 sector 37039683 SCSI:medium error -  - If the disk is in a RAID group, the subsystem will attempt to reconstruct unreadable data (3 3 0 3a) (3446) Disk 2a.15.23 Shelf 15 Bay 23 [NETAPP   X316_HARIH06TA07 NA00] S/N [1EH8NDAF] UID [5000CCA2:32481C2C:00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000]


Sun May 07 12:00:34 +0000 [node01: disk_server_0: disk.ioReassignSuccess:notice]: disk 2a.15.23: sector 37039683 was reassigned (785). Disk 2a.15.23 Shelf 15 Bay 23 [NETAPP   X316_HARIH06TA07 NA00] S/N [1EH8NDAF] UID [5000CCA2:32481C2C:00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000]


Sun May 07 12:02:52 +0000 [node01: disk_latency_monitor: shm.threshold.ioLatency:debug]: Disk 2a.15.23 has exceeded the expected IO latency in the current window with average latency of 52 msecs and average utilization of 53 percent. Highest average IO latency: 2a.15.23: 52 msecs; next highest IO latency: 9d.67.0: 35 msecs. Disk 2a.15.23 Shelf 15 Bay 23 [NETAPP   X316_HARIH06TA07 NA00] S/N [1EH8NDAF] UID [5000CCA2:32481C2C:00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000]


Sun May 07 12:03:22 +0000 [node01: disk_latency_monitor: shm.threshold.ioLatency:debug]: Disk 2a.15.23 has exceeded the expected IO latency in the current window with average latency of 65 msecs and average utilization of 62 percent. Highest average IO latency: 2a.15.23: 65 msecs; next highest IO latency: 9d.67.0: 37 msecs. Disk 2a.15.23 Shelf 15 Bay 23 [NETAPP   X316_HARIH06TA07 NA00] S/N [1EH8NDAF] UID [5000CCA2:32481C2C:00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000]
 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.