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Hi team,

we have master-slave setup with axfr zone transfer. Have enabled notify option in master and slave . Master is sending the notification, slave is receiving it and showing in log as transferred but it is taking 12 minutes to update the zone file. I am not sure, why it is taking 12 min to update zone file when the log shows as transfer complete

Master Named.conf +++

options {

listen-on port 53 { any; };

listen-on-v6 { none; };

directory "/etc/named";

dump-file "/var/named/data/cache_dump.db";

statistics-file "/var/named/data/named_stats.txt";

memstatistics-file "/var/named/data/named_mem_stats.txt";

dnssec-enable no;

dnssec-validation no;

zone-statistics yes;

interface-interval 0;

empty-zones-enable yes;

check-names master warn;

transfers-in 48;

transfers-out 48;

transfers-per-ns 24;

max-transfer-time-in 5;

max-transfer-idle-in 2;

max-transfer-time-out 5;

max-transfer-idle-out 2;

#};

keys, acls, etc.

#include "common.conf";

internal view

#view "internal" in {

match-destinations { 10.x.x.x; };

recursion no;

zone "." in { type hint; file "named.root"; };

allow-query { any; };

allow-transfer { any; };

notify explicit;

also-notify {

x.x.x.x;

x.x.x.x;

};

include "internal.conf";

#};

+++

//Slave Named.conf

+++ #options {

listen-on port 53 { any; };

listen-on-v6 port 53 { any; };

directory "/etc/namedb";

# don't dump large cores...

coresize 0;

dump-file "/var/named/data/cache_dump.db";

statistics-file "/var/named/data/named_stats.txt";

memstatistics-file "/var/named/data/named_mem_stats.txt";

zone-statistics yes;

interface-interval 0;

empty-zones-enable yes;

ixfr-from-differences yes;

transfers-in 48;

transfers-out 48;

transfers-per-ns 24;

max-transfer-time-in 5;

max-transfer-idle-in 2;

max-transfer-time-out 5;

max-transfer-idle-out 2;

max-journal-size 2m;

# NOTE: 'unlimited' is a special value, according to BINDv9ARM:

# "unlimited means the maximum value of 32-bit unsigned integers (0xffffffff)"

# we are capping the cache at 4GB.

max-cache-size unlimited;

acache-enable yes;

max-acache-size 1073741824;

check-names master warn;

minimal-responses yes;

# default 10

clients-per-query 50;

# default 100

max-clients-per-query 500;

# setting this too high is counter-productive

# http://marc.info/?l=bind-users&m=143463374704452&w=2

recursive-clients 3000;

notify no;

masterfile-format text;

qname-minimization disabled;

# dnssec validation

dnssec-enable yes;

dnssec-validation auto;

#};

#disable client cookie validation #include "disable_client_cookie.conf";

keys, acls, etc.

#include "common.conf";

internal ces view

#view "internal" in {

match-destinations { 127.0.0.1; x.x.x.x; };

recursion yes;

zone "." in { type hint; file "named.root"; };

allow-query { any; };

allow-recursion { any; };

allow-transfer { any; };

allow-notify { any; };

include "internal.conf";

# Perf Zone

include "perf.conf";

};

+++

Logs in Master (messages)

+++ 07-Oct-2021 03:52:57.657 notify: zone perf.test.com/IN/internal: sending notifies (serial 1633521028) 07-Oct-2021 03:52:57.665 notify: zone perf.test.com/IN/external: sending notifies (serial 1633521002) 07-Oct-2021 03:52:58.157 xfer-out: client x.x.x.x.#51164 (perf.test.com): view internal: transfer of 'perf.test.com/IN': AXFR-style IXFR started 07-Oct-2021 03:52:58.160 xfer-out: client x.x.x.x#51164 (perf.test.com): view internal: transfer of 'perf.test.com/IN': AXFR-style IXFR ended +++

Logs in Slave ( Messages) ++ 07-Oct-2021 03:51:29.204 notify: client @0x7f7c5c1f17a0 x.x.x.x#61849: view internal: received notify for zone 'perf.test.com' 07-Oct-2021 03:51:29.205 xfer-in: transfer of 'perf.test.com/IN/internal' from x.x.x.x#53: connected using 10.10.133.16#35051 07-Oct-2021 03:51:29.208 notify: client @0x7f7c676ee840 x.x.x.x#5572: view ces-internal: received notify for zone 'perf.test.com' 07-Oct-2021 03:51:29.211 xfer-in: transfer of 'perf.test.com/IN/internal' from x.x.x.x#53: Transfer status: success 07-Oct-2021 03:51:29.211 xfer-in: transfer of 'perf.test.com/IN/internal' from x.x.x.x#53: Transfer completed: 1 messages, 661 records, 16213 bytes, 0.005 secs (3242600 bytes/sec) ++

but zone file got updated after 12 minutes root@stage-ces-rdns1 ~]# ls -ltr /etc/namedb/perf_test.zone -rw-r--r--. 1 named named 18812 Oct 7 04:04 /etc/namedb/perf_test.zone

Why there is a delay in updating zone file when the logs as transfer complete. PLease help us to narrow down the issue.

Regards K.Keerthiga