Resolver routines may require additional overhead for short host name queries when performing top level domain queries in Red Hat Enterprise Linux 7

Solution Verified - Updated -

Issue

  • Resolver routines may require additional overhead for short host name queries when performing top level domain queries in Red Hat Enterprise Linux 7.
  • Starting with Red Hat Enterprise Linux 7 resolver routines perform top level domain query by default which can result in more time and overhead for short host name queries.
  • Resolver performance (ie. gethostbyname) in Red Hat Enterprise Linux 7 is slower than Red Hat Enterprise Linux 6, especially when host name is not present in DNS.
  • Does RHEL 7 support no-tld-query option in /etc/resolv.conf?

Environment

Red Hat Enterprise Linux (RHEL) 7

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