DNS Server benchmarking

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Artyom Gavrichenkov

Translated slides from Highload 2013

Internet

DNS Server benchmarking
Andrey Leskin
Qrator Labs

What is DNS?
• In short:
highloadlab.com à 178.248.233.7
• Really:
(incomplete)

DNS servers
• minidns dns server
https://code.google.com/p/minidns/source/browse/minidns
“wc -l minidns”
107 (!!!)
• Authoritative.
There can be only one!
• Caching.
The cache is out there...

What do we want?
• Performance
• Reliability
• Speed
QUERIES
SUPER
Authoritative
Server
QUERIES
SUPER
Caching
Server
SLOW
Authoritative
Server
• Domains: A FEW
• Queries: A LOT

DNS test
• dnsperf & resperf? NO
• tcpreplay? NO
• Ideal/real world data? NOOO!!!

DNS test. Measurements
• QPS, RPS = PPS
• Traffic: Mbit/s
• CPU load avg
• Transparent degradation!
• …

DNS test. Setup
• Knot (1.2.0 & 1.3.0-RC5)
• Yadifa (1.0.2)
• NSD3 (3.2.15)
• NSD4 (4.0.0b4)
• PowerDNS (3.3)
• TinyDNS (1.05)
• Unbound (1.4.16)
• Pdnsd (1.2.8)
• Server:
Dual Xeon E5-2670
32Gb RAM DDR3 1333Mhz
Intel X520-DA2 10Gbit
• Generator:
Single Xeon E5-2670
32Gb RAM DDR3 1333Mhz
Intel X520-DA2 10Gbit
• Gentoo Linux 3.7.9

DNS test. Setup
• Vanilla setup
• Authoritative:
300 crafted zones
• Caching:
Roughly the same amount of data

Results. Queries in flow: 01
Knot
NSD
Unbound
Yadifa
PowerDNS
Pdnsd
TinyDNS

Results. Queries in flow: 02
Knot
NSD
Unbound
PowerDNS
Pdnsd
Yadifa
TinyDNS

Results. Queries in flow: 20
Knot
NSD
Unbound
PowerDNS
Pdnsd
Yadifa
TinyDNS

Thanks!
Andrey Leskin
serenheit@qrator.net

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DNS Server benchmarking

1. DNS Server benchmarking Andrey Leskin Qrator Labs

2. What is DNS? • In short: highloadlab.com à 178.248.233.7 • Really: (incomplete)

3. DNS servers • minidns dns server https://code.google.com/p/minidns/source/browse/minidns “wc -l minidns” 107 (!!!) • Authoritative. There can be only one! • Caching. The cache is out there...

4. What do we want? • Performance • Reliability • Speed QUERIES SUPER Authoritative Server QUERIES SUPER Caching Server SLOW Authoritative Server • Domains: A FEW • Queries: A LOT

5. DNS test • dnsperf & resperf? NO • tcpreplay? NO • Ideal/real world data? NOOO!!!

6. DNS test. Measurements • QPS, RPS = PPS • Traffic: Mbit/s • CPU load avg • Transparent degradation! • …

7. DNS test. Setup • Knot (1.2.0 & 1.3.0-RC5) • Yadifa (1.0.2) • NSD3 (3.2.15) • NSD4 (4.0.0b4) • PowerDNS (3.3) • TinyDNS (1.05) • Unbound (1.4.16) • Pdnsd (1.2.8) • Server: Dual Xeon E5-2670 32Gb RAM DDR3 1333Mhz Intel X520-DA2 10Gbit • Generator: Single Xeon E5-2670 32Gb RAM DDR3 1333Mhz Intel X520-DA2 10Gbit • Gentoo Linux 3.7.9

8. DNS test. Setup • Vanilla setup • Authoritative: 300 crafted zones • Caching: Roughly the same amount of data

9. Results. Knot-1.2.0, queries=1

10. Results. Knot-1.2.0, queries=1 Вот он!

11. Results. Queries in flow: 01 Knot NSD Unbound Yadifa PowerDNS Pdnsd TinyDNS

12. Results. Queries in flow: 01 Knot NSD Unbound Yadifa PowerDNS Pdnsd TinyDNS

13. Results. Queries in flow: 02 Knot NSD Unbound PowerDNS Pdnsd Yadifa TinyDNS

14. Results. Queries in flow: 02 Knot NSD Unbound PowerDNS Pdnsd Yadifa TinyDNS

15. Results. Queries in flow: 02 Knot NSD Unbound PowerDNS Pdnsd Yadifa TinyDNS

16. Results. Queries in flow: 20 Knot NSD Unbound PowerDNS Pdnsd Yadifa TinyDNS

17. Thanks! Andrey Leskin serenheit@qrator.net

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