slave zone files unreadable

[Reindl Harald]

Am 09.07.2014 14:13, schrieb Reindl Harald:
> Am 09.07.2014 14:07, schrieb Anand Buddhdev:
>> On 09/07/2014 13:21, Reindl Harald wrote:
>>
>>> dunno, but i perfer text-format anyways
>>>
>>> * masterfile-format text; * delete the zone file on the slave *
>>> restart the slave
>>
>> Plain text zone files are fine if you have a small number of zones, or
>> small zones. But for servers with large numbers of zones, or large
>> zones, reading back from text files when starting the server can take
>> a long time. The "raw" format helps by speeding up load time. The
>> newer "map" format in BIND 9.10 is even better, and can improve zone
>> load time over the "raw" format by a factor of 3.
>>
>> As an example, on one of my BIND slaves with over 5000 zones, reading
>> from plain text zone files takes about 90 seconds, from raw files, it
>> takes 45 seconds, and from map files, just 15 seconds
> 
> agreed, but in case of debugging temporary switch to text
> makes thins easier to watch including sniff the traffic
> of zone-transfers - made it as example possible for me
> to *really* find out that the master was sending expected
> zone content and the cisco router between mangeled it

however, i wonder what takes 90 seconds to load 5000 zones

our master has 533 zones, zone files generated with self written
scripts as plaintext and loads them due a hard restart within
0.3 seconds and all notifies to the slave happen in the same second

the records-sql table has 3000 entries for all zones (backend
generates the zone-files in another table as text-field and
that content is fetched in case of changes from cronobs on the
nameservers and written down to zonefiles in case of changes)

[root at ns2:~]$ cat named.log | grep "loaded serial" | wc -l
533

09-Jul-2014 15:06:30.734 general: exiting
09-Jul-2014 15:06:30.827 general: managed-keys-zone: loaded serial 0
09-Jul-2014 15:06:30.948 general: all zones loaded
09-Jul-2014 15:06:30.968 notify: zone ***/IN: sending notifies (serial 2014070201)

last message on the slave - all happens at 15:06
09-Jul-2014 15:06:57.961 general: zone ***/IN: notify from 10.0.0.16#15394: zone is up to date

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