Avamar: DNS caching

Summary: This article provides some general information ir order to provide answers to common questions about DNS caching on an Avamar Server.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Instructions

Information:
  • Avamar Grids run the SUSE Enterprise Linux as the operating system. 

 

  • DNS caching is not enabled in SUSE by default.

 

  • Services such as nscd, bind, unbind, dnsmasque, and other DNS caching mechanisms must be manually enabled for DNS caching.

 

  • The /etc/hosts file on Avamar contains the entries for the storage nodes (internal and external IP addresses) and can serve as a caching option. Also a DNS server that is configured as caching-only would also serve this purpose.

 

  • The /etc/nsswitch.conf is configured to check the /etc/hosts file before reaching out to the DNS servers defined in the /etc/resolv.conf files.

    On Avamar grids, the nsswitch.conf file should be configured as below: 
hosts: files dns

 

  • The Avamar kickstart images do not contain the nscd rpm and hence an option to manually configure one of such DNS caching daemons/services is not supported. 

Affected Products

Avamar

Products

Avamar, Avamar Server, Avamar Virtual Edition
Article Properties
Article Number: 000010541
Article Type: How To
Last Modified: 05 Dec 2024
Version:  5
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