Skip to main content
NetApp Response to Russia-Ukraine Cyber Threat
In response to the recent rise in cyber threat due to the Russian-Ukraine crisis, NetApp is actively monitoring the global security intelligence and updating our cybersecurity measures. We follow U.S. Federal Government guidance and remain on high alert. Customers are encouraged to monitor the Cybersecurity and Infrastructure Security (CISA) website for new information as it develops and remain on high alert.
NetApp Knowledge Base

FAQ: Unicode conversions

Views:
343
Visibility:
Public
Votes:
0
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.

 

 

Scan to view the article on your device
CUSTOMER EXCLUSIVE CONTENT

Registered NetApp customers get unlimited access to our dynamic Knowledge Base.

New authoritative content is published and updated each day by our team of experts.

Current Customer or Partner?

Sign In for unlimited access

New to NetApp?

Learn more about our award-winning Support

 

  • Was this article helpful?