is outside the range of RFC 1912, which is entitled "Common DNS Operational and Configuration Errors." [1] Section 2.2 of RFC 1912 recommends a maximum of 12 hours for the SOA refresh rate: "You can keep it short (20 mins to 2 hours) if you aren't worried about a small increase in bandwidth used, or longer (2-12 hours) if your Internet connection is slow or is started on demand." This commit sets the default refresh interval at the nearest value recommended by the standard, which is 12 hours. Due to the widespread adoption of NOTIFY messages between primary and secondary DNS servers, the SOA refresh interval has arguably lost some importance, but the Guix default should still be in line with the standards. Values outside the recommended range can provoke warning messages from services commonly used to find bugs in DNS configurations, such as the MX Toolbox Super Tool. [2] [1] https://datatracker.ietf.org/doc/rfc1912/ [2] https://mxtoolbox.com/SuperTool.aspx * gnu/services/dns.scm (<zone-file>)[refresh]: Default to (* 12 3600). Signed-off-by: 宋文武 <iyzsong@member.fsf.org>

Age	Commit message (Expand)	Author
2021-03-10	ci: Remove hydra support....This removes hydra support to use Cuirass as the only continuous integration system. * build-aux/hydra/gnu-system.scm: Remove it. * build-aux/hydra/guix-modular.scm: Ditto. * build-aux/hydra/guix.scm: Ditto. * build-aux/cuirass/hydra-to-cuirass.scm: Ditto. * Makefile.am (EXTRA_DIST): Update it. (hydra-jobs.scm): Remove it. (cuirass-jobs.scm): Update it. * build-aux/hydra/evaluate.scm: Move it to ... * build-aux/cuirass/evaluate.scm: ... here. * build-aux/cuirass/guix-modular.scm: Remove it. * build-aux/cuirass/gnu-system.scm: Ditto. * guix/packages.scm (%hydra-supported-systems): Rename it to ... (%cuirass-supported-systems): ... this variable. * build-aux/check-final-inputs-self-contained: Adapt it. * etc/release-manifest.scm: Ditto. * gnu/ci.scm (package->alist): Remove it. (derivation->job): New procedure. (package-job, package-cross-job, cross-jobs, image-jobs, system-test-jobs, tarball-jobs): Use it. (guix-jobs): New procedure. (hydra-jobs): Rename it to ... (cuirass-jobs): ... this procedure.	Mathieu Othacehe
2018-12-04	Remove most references to hydra.gnu.org....* Makefile.am (assert-binaries-available): Don't mention hydra.gnu.org in comment. * build-aux/check-available-binaries.scm: Likewise. * build-aux/check-final-inputs-self-contained.scm: Likewise. * doc/guix.texi (SUBSTITUTE-SERVER): New variable. Use it throughout instead of "mirror.hydra.gnu.org". * doc/contributing.texi (Submitting Patches): Likewise. * gnu/services/base.scm (hydra-key-authorization) (guix-activation): Remove mentions of "hydra.gnu.org" in comments and messages. * gnu/system/install.scm (%installation-services): Likewise. * guix/scripts/size.scm (guix-size): Likewise.	Ludovic Courtès
2018-03-25	maint: Adjust 'check-final-inputs-self-contained' for glibc:static....This change is necessary to cope with 6dff905e51202bbdebbad8811b6509584d12a796. * build-aux/check-final-inputs-self-contained.scm (final-inputs): Change 'match' pattern to match (LABEL PACKAGE OUTPUT).	Ludovic Courtès
Felix Lechner
2022-06-04	services: ddclient: No need to import (ice-9 rdelim) from the host....* gnu/services/dns.scm (ddclient-activation): Remove (ice-9 rdelim) from the with-imported-modules form. Signed-off-by: Ludovic Courtès <ludo@gnu.org>	Attila Lendvai