Questions tagged «100g»

2
40G / 10G和100G / 25G以太网中的序列化和序列化时间
最近,我参与了有关托管OpenStack平台的Leaf / Spine(或CLOS)网络的最低​​延迟要求的讨论。 系统架构师正在努力为他们的事务(块存储和未来的RDMA方案)提供尽可能低的RTT,并且声称100G / 25G与40G / 10G相比大大减少了序列化延迟。所有相关人员都知道,端到端游戏中还有很多因素(任何因素都可能损害或帮助RTT),而不仅仅是NIC和交换机端口序列化延迟。尽管如此,有关序列化延迟的话题仍在不断涌现,因为它们是一件事,如果不跳过可能非常昂贵的技术鸿沟,就很难对其进行优化。 稍微简化一下(省去了编码方案),可以将序列化时间计算为位数/比特率,这让我们从10G的〜1.2μs开始(另请参见wiki.geant.org)。 For a 1518 byte frame with 12'144bits, at 10G (assuming 10*10^9 bits/s), this will give us ~1.2μs at 25G (assuming 25*10^9 bits/s), this would be reduced to ~0.48μs at 40G (assuming 40*10^9 bits/s), one might expect to see ~0.3μs at 100G …
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