Cache Me If You Can: Effects of DNS Time-to-Live
Cache Me If You Can: Effects of DNS Time-to-Live
复制标题
如果可以的话缓存我:DNS 生存时间的影响
DOI:
10.1145/3355369.3355568
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Hardaker, Wes
中科院分区:
文献类型:
--
作者:
Moura, Giovane C.;Heidemann, John;Schmidt, Ricardo de;Hardaker, Wes
DNS depends on extensive caching for good performance, and every DNS zone owner must set Time-to-Live (TTL) values to control their DNS caching. Today there is relatively little guidance backed by research about how to set TTLs, and operators must balance conflicting demands of caching against agility of configuration. Exactly how TTL value choices affect operational networks is quite challenging to understand due to interactions across the distributed DNS service, where resolvers receive TTLs in different ways (answers and hints), TTLs are specified in multiple places (zones and their parent's glue), and while DNS resolution must be security-aware. This paper provides the first careful evaluation of how these multiple, interacting factors affect the effective cache lifetimes of DNS records, and provides recommendations for how to configure DNS TTLs based on our findings. We provide recommendations in TTL choice for different situations, and for where they must be configured. We show that longer TTLs have significant promise in reducing latency, reducing it from 183 ms to 28.7 ms for one country-code TLD.
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DOI:
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发表时间:
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期刊:
影响因子:
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DOI:
10.1145/3143361.3143375
发表时间:
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期刊:
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发表时间:
2004-03
期刊:
RFC
影响因子:
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作者:
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发表时间:
1997
期刊:
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2017
期刊:
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