Monday, December 22, 2008
But what's this? Number 2 exchange DE-CIX claims a 650+ Gbps peak:
Does that mean the Deutscher Commercial Internet Exchange is now #1?
Comparison of the mean throughputs (AMS-IX: 375 Gbps, DE-CIX: 299 Gbps), daily peaks (AMS-IX: 560 Gbps, DE-CIX: 460 Gbps), and number of interconnected members (AMS-IX: 311, DE-CIX: 264) shows AMS-IX still firmly in the lead. But DE-CIX is forging ahead - AMS-IX's lead doesn't seem as clear as it once was.
Friday, October 10, 2008
The number 1 internet exchange in the world by traffic volume - AMS-IX in Amsterdam - has reached 500 Gbps!
Notice the well-known flat summer trend. It's interesting to project what the max will reach by December: 550-600 Gbps?
Friday, September 19, 2008
Using a global network of edge locations this new service can deliver popular data stored in Amazon S3 to customers around the globe through local access.Now, Amazon is only currently peering visibly with 4 other networks: Qwest, NTT, Tiscali, and Level3, which all seem to be transit providers.
Now I guess their edge routers don't absolutely need to sit in peered networks, but I'm sure it'll make the host networks happier [otherwise those host networks will be bearing the cost of reverse-proxying the traffic through their own transit connections].
The PeeringDB page for Amazon isn't that much more helpful - no public switching presence noted, but there is some promise shown in the following locations:
Tuesday, September 09, 2008
This is only in the UK for now, presumably they'll peer locally when Google gets their act together. Let's hope Google isn't waiting for the Seacom cable to land too.
Wednesday, July 16, 2008
Masie said that by the end of 2008 services such as Google Search, Google Maps and Youtube would work a lot faster, better and quicker in South Africa.Google SA have been quite coy in announcing anything about their local datacenter plans. Is this to avoid tipping their hand? Perhaps they'll extend their GGC 'CDN' to South Africa. This might be the best way to dip their toe in the waters and gauge local usage and interest, especially once mid-2009 rolls around and Seacom's better pricing comes online.
Friday, July 11, 2008
So UPenn researchers have discovered a good way of storing ternary digits.
Great news for Cisco, Juniper, et al. You may wonder why, and the answer is quite simple: TCAMs. Basically this could help speed up address mangling, e.g. for routing tables.
Thursday, July 10, 2008
Wednesday, July 09, 2008
Infraco - I'm talking about you!
It's not that surprising, really. What is interesting is the talk of SAT-3 (amusingly and unintentionally further abbreviated as at-3) being upgraded to 320 Gbps. This will at least help Telkom with some extra bandwidth - 120 Gbps was pretty paltry at introduction and now looks downright anemic. Does Telkom dominate the SAT-3 consortium so much that it can just force the upgrade?
Thursday, June 12, 2008
Wednesday, June 11, 2008
Tuesday, April 22, 2008
11 220.127.116.11 (18.104.22.168) 165.620 ms 160.809 ms
12 ge2-20-0-cr0.tch.uk.as6908.net (22.214.171.124) 236.578 ms 198.183 ms
13 te-4-2.r00.londen05.uk.bb.gin.ntt.net (126.96.36.199) 151.840 ms 153.098 ms
Wednesday, April 16, 2008
And also a candidate for "Least Paperless Office of the Year"
[and I'm tempted to say that it was so small I couldn't fit inside to take pictures, but I was actually too lazy to try]
[office extends from the pillar on the left of the frame to the right of the frame - i.e. 2 window frames]
[the third window frame visible on the right is someone else's office!]
This is in the Leslie Commerce building. At least this is a hard worker (all those papers!), so no comments about the tightwads there, please...
Tuesday, April 15, 2008
Is Facebook planning on using multiple CDNs?
Both static.ak.fbcdn.net and static.ak.facebook.com seem to be hosted by Akamai, so for us "lucky" .ac.za we get routed through IS. This is actually good news, as we have a very high-speed connection to IS from TENET. Unfortunately, most institutions connect slowly into TENET (~30 Mbps for UCT!) and implement some shaping on popular websites. So we don't get most of the benefit.
Friday, April 11, 2008
We know eVLBI would require a 1Gb all the way to Amsterdam, current projections for full SKA is 100GB international capacity, the MeerKAT project will probably require 10GB of bandwidth.So something like the 'bandwidth glut' of Infraco would definitely be required.
It seems like the only people talking about having too many cables are those with a vested interest in having only a few [competing] cables.
Thursday, April 10, 2008
Peak speeds are about 50 Mbps. Combined with the Telia peak of ~100 Mbps, this means TENET currently has ~150 Mbps peak transit.
Note the very small outbound. Mmmm, eyeballs.
Monday, April 07, 2008
All Neotel MPLS GEN3 sites experienced a number of service failureseven given
early yesterday morning. It appears that these were caused by Neotel
maintenance, of which TENET was not informed in advance.
The Service Level Agreement provides that: "...The Providers will give TENET four days' advance notice of planned maintenance."Let's hope Neotel doesn't become Neotelkom [the new Telkom?] :)
Monday, March 31, 2008
[snip lots]AFAIK this actually happened ages ago. So there's no real reason to trot this out now unless people are griping that GEN3 isn't doing much for them.
ICTS has implemented Packeteer Packetshaper
[snip lots more]
And there's no mention of what will happen once:
- UCT transitions to SANReN and has a 10 Gbps link to the local node, and
- TENET moves to the 10 Gbps overseas pipe due mid-2009
Consider this paper on web search clickstreams http://doi.acm.org/10.1145/1177080.1177110]:
The MWN [Munich Scientific Network] provides a 10Gbit/s singly-homed Internet connection to roughly 50,000 hosts at two major universities along with additional institutes; link utilization is typically only around 200–500 Mbit/s in each direction.Now this might have been back in 2006; it doesn't really matter if the traffic demand has doubled since then. Also, since major local and international peering will then be in effect, actual transit pressure should decrease.
C'mon ICTS - plan ahead now!
Tuesday, March 25, 2008
I did have a great day, and I got loads of really cool (and some really cool and unusual) presents.
Based on my experiences with this birthday, I can definitely recommend having a birthday to anyone. I myself plan to have many more.
* Whomever said that technology depersonalises our social interaction was a 'nana.
Wednesday, March 19, 2008
The correct advice now:
- Open (i.e. type)
about:configin the location bar
- Search for
network.negotiate-auth.allow-proxiesin the search bar
- Double-click the line to set the value to false
Thursday, March 13, 2008
CPUT's main Bellville campus is obviously in need of more, More, MORE! bandwidth. Roll on, SANREN.
Monday, March 10, 2008
My follow-up article will be unreliable sources, which I'm factchecking more carefully. For now, a few types to distrust:I guess for South Africa, he's specifically talking about high bandwidth costs, 'cos I don't know of any ISPs selling DSL for $20/R160 here.
- The FCC or anyone else who takes seriously a 200K definition of broadband.
- Anyone who defends a bandwidth cap below about 150 gigabytes per month, except where bandwidth costs are unusually high or the service selling for under about $20. (India, South Africa, possibly the U.K.). Ask mo [sic] for the numbers if you don't get it.
Thursday, March 06, 2008
Hmmm, what does the SLA say about this? 99% uptime implies 1% downtime.
365 days x 24 hours x 1% = 87.60 hours down per year.
So they have loads of downtime left - bah humbug.
A quick estimation from the ML Sultan campus of DUT:
The interruption starts around 19h30 on the 5th of March, and lasts until about 09h30 on the 6th of March. That's 14 hours total. Ouch.
So we can look forward to another 73.6 hours of downtime. That's another 3 days left!
Tuesday, March 04, 2008
Interesting to see specific figures. I'm intrigued to see that 260 ms RTT 'average'.
The Providers commit to the following levels of service element availability:Services provided by Neotel:99%
Services provided by Internet Solutions:International services: 99.8%National services: 99.95%
6. Response times (“RTT”)
The Providers commit to the following network RTT averages:
Services provided by Neotel: 150 ms
Services provided by Internet Solutions:International services: 260 ms
National services: 35 ms (services provided out of Rosebank)
50 ms (services provided out of Cape Town)
7. Packet loss
The providers commit to confining packet loss to the following levels:Services provided by Neotel: 1%
Services provided by Internet Solutions:International services: 1.5%National services: 2%
Sunday, March 02, 2008
Compare GEN2 stats vs GEN3 stats:
The big view seems to indicate traffic starting sometime in Week 07, about Tuesday:
The uncommissioned orders page shows UCT's link to become active on 1st March, 2008. So maybe it's all testing traffic.
It's interesting to see the TENET-JINX graphs too:
Note that we're not seeing massive usage through JINX. This basically boils down to two costs as limiting factors:
1) The equivalent-line-charge
2) The ISPA category charge (small, medium, large)
Now TENET is an honorary ISPA member, so presumably doesn't have to pay the small [by comparison] R6100 pm. But there's an incredible step function in the Equivalent Line Charge going from R0 per month to R22k per month as you transgress 2 Mbps. So can we assume private peering in/near the JINX facility?
Tuesday, February 05, 2008
Stafford Masie of Google SA at a MyADSL conference in November 2007 [thanks ITWeb]
“We are going to establish a point of presence in this country, which means the international bandwidth problem is solved. There will be a big announcement in a month,” Masie said at the time.Google do host a lot of bandwidth-intensive services, and having these served locally will help a lot with latency (for the cached stuff, of course) and cheaper bandwidth, especially for consumers.
Those local-only ADSL accounts are starting to look great. Telkom's partial-compliance with the ICASA rulings on local bandwidth will help too. Perhaps using Stefano's DSL split-routing setup will become more commonplace.
Of course, a month from November 2007 was December 2007 or, charitably, January 2008. Still no word though. Google - what news?
Let's see, the more bandwidth-intensive Google services are:
Monday, February 04, 2008
Power rationing could result in demand for electricity falling by between 10 percent and 20 percent if successful and could dent Eskom's revenue, presenting further difficulty in funding the company's capital expansion.You read it here first, folks! So I've been ahead of the game on that call :) I look forward to breaking many more stories for y'all.
Roll on Electric-gates!
Sunday, January 20, 2008
Now the daily graph does only show a 395 Gbps maximum, so this could be [partially] an aliasing issue, but I think it's safe to say that the milestone is passed.
It's not like Eskom can save all of that power for use during the day; Palmiet can only generate a modest amount of power: the 2 turbines are only 200 MW each.
And who else is using lots of power at night? Not household consumers. So there is more than enough to go around at that time.
And who else is using lots of power during the day? Not household consumers. Many of them are at work / school / out-of-the-house.
So the primary contention-period is during early-morning periods (with hot water cylinders, kettles, and microwave ovens going mad) or evening periods (with hot water cylinders, stoves/microwave ovens, televisions*, and heaters/airconditioning being the primary culprits). And many people are early into their offices (I used to get in before 6am myself sometimes) and leave late (oh those productive captains-of-industry). So I don't think many people would complain about power usage in offices during those periods.
So what's all the complaining really about?
"Those people have lights while we don't. They don't need the lights and we do. They suck."
Back in reality, we should encourage conspicuous consumption by large corporates. I would love them to be sucking down as much juice as possible during the quiet period, as this means more demand - AND MORE PROFIT - for Eskom. Would you rather have Eskom build all of those new power-plants purely from your tax money, or from the profit they have earned off other people's excess consumption? No one else needs that power in the middle of the night.
* - Have you noticed that the power-consumption-warnings on TV say to turn off all nonessential appliances except your TV? Hmmm...
Wednesday, January 09, 2008
300g dark chocolate
4 eggs, separated
250ml cream, whipped
Break chocolate and melt.
Sprinkle gelatine over 40ml water and allow to sponge (dissolve.)
Whisk egg yolks until fluffy and add melted chocolate and liqueur.
Add dissolved gelatine and mix well.
Whip egg whites until stiff and fold into chocolate mixture.
Fold in whipped cream.
Put in glass and chill until set.
~ ENJOY ~