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Marek Majkowski

Marek Majkowski

September 20, 2019 3:53PM

When TCP sockets refuse to die

SYN TCP Spectrum Tech Talks

We noticed something weird - the TCP sockets which we thought should have been closed - were lingering around. We realized we don't really understand when TCP sockets are supposed to time out! We naively thought enabling TCP keepalives would be enough... but it isn't!...

March 15, 2019 5:01PM

RFC8482 - Saying goodbye to ANY

DNS DNSSEC Security Reliability

Ladies and gentlemen, I would like you to welcome the new shiny RFC8482, which effectively deprecates DNS ANY query type. DNS ANY was a "meta-query" - think about it as a similar thing to the common A, AAAA, MX or SRV query types, but unlike these it wasn't a real query type - it was special....

November 23, 2018 3:49PM

你的计算机内存每7.8微秒会有一个小停顿

简体中文 Deep Dive International

最近,在访问山景城的计算机历史博物馆的时,我深深地被过去的一些磁芯内存所吸引。我发现我完全不知道这些东西曾经是如何运作的。我想知道环是否旋转(它们没有),以及为什么每个环都有三根电线穿过(我仍然不明白它们是如何工作的)。更重要的是,我意识到我对现代计算机内存——动态RAM的工作方式知之甚少!...