Skip to main content
NetApp Knowledge Base

FAQ: Unicode conversions

  1. Last updated
  2. Save as PDF
Views:
820
Visibility:
Public
Votes:
1
Category:
ontap-9
Specialty:
CORE
Last Updated:

Applies to

  • Data ONTAP 7-mode
  • clustered Data ONTAP 8
  • ONTAP 9

Description

When a CIFS/NFSv4 client first accesses a directory, it may trigger the Unicode conversion. If your storage environment already contains existing NFSv3 directories with large numbers of subdirectories and files, the automatic on-first-access conversion can have a performance impact on the storage system.

  • This conversion is resource-intensive and might result in the system becoming temporarily unresponsive, including a loss of service.
  • Possible Symptoms encountered due to conversions:
    • Loss of Heartbeat
    • Unsynchronized logs
    • No ssh access
    • No data access
  • EMS message indicating a conversion is causing performance degradation:

Tue Jan 17 14:16:33 CST [netapp_fake: wafl_hipri: wafl.dir.convert:warning]: WAFL converting directory conversion in progress.

  • Anticipating the use of large directories by CIFS/NFSv4 clients is the key to avoiding processing delays, which this issue can trigger.

 

 

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.