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On the ‘web: A new way to deal with DDoS

Most large scale providers manage Distributed Denial of Service (DDoS) attacks by spreading the attack over as many servers as possible, and simply “eating” the traffic. This traffic spreading routine is normally accomplished using Border Gateway Protocol (BGP) communities and selective advertisement of reachable destinations, combined with the use of anycast to regionalize and manage load sharing on inbound network paths. But what about the smaller operator, who may only have two or three entry points, and does not have a large number of servers, or a large aggregate edge bandwidth, to react to DDoS attacks?

I write for ECI about once a month; this month I explain DOTS over there. What to know what DOTS is? Then you need to click on the link above and read the story. ?

The post On the ‘web: A new way to deal with DDoS appeared first on rule 11 reader.

PCIe versus Ethernet in a Composable System

I posted a link to a worth reading story last week about Liqid’s composable hyperconverged system. A reader (Vova Moki) commented on the LinkedIn post with this question—

Although I don’t understand how much faster is the PCIe than regular NICs?

Excellent question! It certainly seems that 100g Ethernet should be much faster than PCIe; this article lists the highest speed of PCIe as 15.8G/s across 16 lanes, with faster speeds expected into the future. Further, PCIe runs on parallel lanes, which means it must be very difficult to build a switch for the technology. The simplest way to build such a switch would be to pull the signals off the 16 different lanes, serialize them into a single packet of some sort, and then push them back out into 16 lanes again (potentially in different order/etc.).

So why should composable systems use something like PCIe, rather than using 100g Ethernet. After all, the Ethernet NIC is essentially doing precisely what a PCIe switch would need to do by pulling the data off a PCIe bus, serializing the data, and sending it over a network to a switch, which can, with the right design, already switch these packets Continue reading

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