The next phase of composable infrastructure involves 5G networks as a fabric type.
Verizon says 13 NFL stadiums will have 5G service when teams square off for week-one action.
$ docker run -p 6343:6343/udp sflow/sflowtoolThe -g option flattens the output so that it is more easily filtered using grep:
startDatagram =================================
datagramSourceIP 10.0.0.111
datagramSize 144
unixSecondsUTC 1321922602
datagramVersion 5
agentSubId 0
agent 10.0.0.20
packetSequenceNo 3535127
sysUpTime 270660704
samplesInPacket 1
startSample ----------------------
sampleType_tag 0:2
sampleType COUNTERSSAMPLE
sampleSequenceNo 228282
sourceId 0:14
counterBlock_tag 0:1
ifIndex 14
networkType 6
ifSpeed 100000000
ifDirection 0
ifStatus 3
ifInOctets 4839078
ifInUcastPkts 15205
ifInMulticastPkts 0
ifInBroadcastPkts 4294967295
ifInDiscards 0
ifInErrors 0
ifInUnknownProtos 4294967295
ifOutOctets 149581962744
ifOutUcastPkts 158884229
ifOutMulticastPkts 4294967295
ifOutBroadcastPkts 4294967295
ifOutDiscards 101
ifOutErrors 0
ifPromiscuousMode 0
endSample ----------------------
endDatagram =================================
$ docker run -p 6343:6343/udp sflow/sflowtool -g | grep ifInOctets
2019-09-03T22:37:21+0000 10.0.0.231 Continue reading
Wake up! It's HighScalability time:
Coolest or most coolest thing ever?
Do you like this sort of Stuff? I'd love your support on Patreon. I wrote Explain the Cloud Like I'm 10 for people who need to understand the cloud. And who doesn't these days? On Amazon it has 54 mostly 5 star reviews (125 on Goodreads). They'll learn a lot and likely add you to their will.
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Weekly Wrap for Sept. 6, 2019: Broadcom releases new PCIe switches; VMware the butt of Nutanix CEO...
I’ve written before about rock stars and IT super heroes. We all know or have worked with someone like this in the past. Perhaps we still do have someone in the organization that fits the description. But have you ever stopped to consider how it could be our culture that breeds the very people we don’t want around?
When’s the last time you got recognition for the network operating smoothly? Unless it was in response to a huge traffic spike or an attack that tried to knock you offline, the answer is probably never or rarely. Despite the fact that networks are hard to build and even harder to operate, we rarely get recognized for keeping the lights on day after day.
It’s not all that uncommon. The accounting department doesn’t get recognized when the books are balanced. The janitorial staff doesn’t get an exceptional call out when the floors are mopped. And the electric company doesn’t get a gold star because they really did keep the lights on. All of these things are examples of expected operation. When we plug something into a power socket, we expect it to work. When we plug a router Continue reading
Today’s Network Collective Community Spotlight is highlighting Kevin Myers. Kevin is an accomplished engineer working in some of the more complicated and advanced corners of the Internet. Join us as we take a look into how Kevin got his start in networking and how he ended up working on some pretty interesting technology.
The post Community Spotlight – Kevin Myers appeared first on Network Collective.
The $1 billion agreement calls for Tech Mahindra to deliver a more advanced SDN for AT&T and...
After years of the same-old webpage template, we have updated and refined our look. I may be biased...
Once again, the world is witnessing the destructive power of a natural disaster. This time, the name is Dorian. What worries us is the fact that wind speeds reached the maximum intensity of five on the Saffir-Simpson scale, causing unprecedented damage to islands of the Bahamas. Of further concern is the fact that some Caribbean countries still have not fully recovered from 2017 storms, Irma and Maria. According to forecasts more storms can be expected as we are in the middle of the hurricane season.
The Caribbean remains vulnerable to natural disasters and this has a huge impact on the social and economic development of the region. According to Professor Jamal Saghir, former World Bank executive, and other experts, 20 percent of the Caribbean GDP is spent on natural disaster recovery. You must realize that we are talking about Small Islands Developing States (SIDS) that are already prone to all kinds of challenges due to their small economies.
Natural disasters are not going away and we can even expect them to have greater destructive power in the future. Although we cannot fight against nature, doing nothing is not an option.
At the Internet Society we work for an Continue reading
Imagine you would have a system that would read network device configurations, figure out how those devices might be connected, reverse-engineer the network topology, and be able to answer questions like “what would happen if this link fails” or “do I have fully-redundant network” or even “how will this configuration change impact my network”. Welcome to Batfish.
Interested? You’ll find more in Episode 104 of Software Gone Wild.
DDSketch: a fast and fully-mergeable quantile sketch with relative-error guarantees Masson et al., VLDB’19
Datadog handles a ton of metrics – some customers have endpoints generating over 10M points per second! For response times (latencies) reporting a simple metric such as ‘average’ is next to useless. Instead we want to understand what’s happening at different latency percentiles (e.g p99).
The ability to compute quantiles over aggregated metrics has been recognized to be an essential feature of any monitoring system… Given how expensive calculating exact quantiles can be for both storage and network bandwidth, most monitoring system will compress the data into sketches and compute approximate quantiles.
Fortunately there are plenty of quantile sketching algorithms available including the GK-sketch, the t-digest, the HDR histogram, and the Moments sketch that we looked at last year. For reasons we’ll see shortly though, none of those were good enough for Datadog, so they developed their own sketching data structure, DDSketch. Officially in the paper DDSketch stands for ‘Distributed Distribution Sketch’ but that seems a bit of a stretch… surely it’s the ‘Datadog Sketch’ ! A glance at the code repository for the Python implementation confirms my suspicion: there are several references to Continue reading