zioproto.ninux.org
ZioPRoTo | Il blog di un Nerd ;)
https://zioproto.ninux.org/wordpress
Il blog di un Nerd ;). Nouruz 2016 al Bürgenstock (Luzern). March 28, 2016. Il 20 marzo per festeggiare Nowruz. Abbiamo fatto una gita nel Kanton Luzern, passeggiata al Bu rgenstock. Rastrelliere per biciclette in Svizzera. March 20, 2016. Ho iniziato a lasciare la bicicletta in stazione a Zug ogni giorno. Nella zona della stazione ci sono diversi spazi dotati di rastrelliere per parcheggiare le biciclette. Rastrelliere alla stazione di Zug. Grosser Mythen (1899 mt). October 2, 2015. Sunday September the...
blog.simon.leinen.ch
From the Fiber Trenches to the Clouds: Ceph Deep-Scrubbing Impact Study
http://blog.simon.leinen.ch/2015/02/ceph-deep-scrubbing-impact.html
From the Fiber Trenches to the Clouds. Friday, February 06, 2015. Ceph Deep-Scrubbing Impact Study. I help operate two geographically separate OpenStack/ Ceph. Clusters consisting of 32 servers each, of which 16 (per cluster) are dedicated OSD. Servers. Each OSD server currently has six OSDs. Each OSD runs on a dedicated 4TB SAS disk. Each server also has SSDs, which are mostly used for OSD write journals. Service: L check logfiles. The "Output" line tells us that a write operation to osd.1 was stuck...
blog.simon.leinen.ch
From the Fiber Trenches to the Clouds: Chrome Beta for Android, first impressions
http://blog.simon.leinen.ch/2012/02/chrome-beta-for-android-first.html
From the Fiber Trenches to the Clouds. Tuesday, February 07, 2012. Chrome Beta for Android, first impressions. So Google published a beta of Chrome for Android. Contain hints on how this can be circumvented - thanks, AJ Stang. Subscribe to: Post Comments (Atom). Windows 10 Update Breaks Most Webcams. IPv6 Performance - Revisited. According to the Best Available Data. CAIDA as Independent Measurement Expert for AT&T. SWITCHengines Under the Hood: Basic IPv6 Configuration. PERT knowledge base changes.
blog.simon.leinen.ch
From the Fiber Trenches to the Clouds: May 2012
http://blog.simon.leinen.ch/2012_05_01_archive.html
From the Fiber Trenches to the Clouds. Sunday, May 13, 2012. Hello World with ØMQ (ZeroMQ), Part I. Why I am interested in ØMQ. Several months ago, I stumbled across an interview. With Pieter Hintjens about ØMQ (ZeroMQ). I have finally found time to start reading the ØMQ Guide. During a train ride from Geneva to Zurich. The introduction ("Fixing the world"). Walking through the "Hello World" example. So now I'm reading through the first, "Hello World", example. Void *context = zmq init (1);. And wouldn't...
blog.simon.leinen.ch
From the Fiber Trenches to the Clouds: September 2010
http://blog.simon.leinen.ch/2010_09_01_archive.html
From the Fiber Trenches to the Clouds. Thursday, September 02, 2010. Which ISPs appear in the following traceroute, and where do they interconnect? 1 swiCE3-10GE-1-4.switch.ch (130.59.36.210) 0 msec # local AS: 559 2 bb1.tor.primus.ca (195.69.145.154) [AS 3549] 108 msec 3 216.254.129.3 (216.254.129.3) [AS 6407] 108 msec 4 www.primus.ca (216.254.141.10) [AS 6407] 104 msec. Links to this post. Subscribe to: Posts (Atom). Windows 10 Update Breaks Most Webcams. IPv6 Performance - Revisited.
blog.simon.leinen.ch
From the Fiber Trenches to the Clouds: January 2007
http://blog.simon.leinen.ch/2007_01_01_archive.html
From the Fiber Trenches to the Clouds. Saturday, January 27, 2007. Dealing with Cisco Router Vulnerabilities. Another about IPv6 routing headers. And another about IP options. This seems to be exactly the kind of problems that Mike Lynn tried to point. Out in 2005. Since we have many IOS-based devices (more than 100), we have to upgrade them to non-vulnerable versions as soon as possible. The scripts work OK, but aren't documented and have to be adapted for other RANCID installations. If you want the...
blog.simon.leinen.ch
From the Fiber Trenches to the Clouds: May 2010
http://blog.simon.leinen.ch/2010_05_01_archive.html
From the Fiber Trenches to the Clouds. Monday, May 24, 2010. GCJ 2010: Load Testing in Common Lisp (wrong). I thought a little about this problem, and then had the idea that the optimal strategy would be to do a binary search between L and P in log-C space. So the required number of tries would be. Defun min-tests (l p c) (max 0 (ceiling (log (- (log p c) (log l c) 2) ). Which was more fun anyway. Later I noticed that someone else. Defun min-tests (l p c) (max 0 (ceiling (log (log )/ p l) c) 2) ). We kee...
blog.simon.leinen.ch
From the Fiber Trenches to the Clouds: September 2009
http://blog.simon.leinen.ch/2009_09_01_archive.html
From the Fiber Trenches to the Clouds. Sunday, September 13, 2009. Google Code Jam 2009 - solutions in Common Lisp. Last year I had a lot of fun with the small puzzles of Google Treasure Hunt. This year, there was no treasure hunt, so I decided to participate in Google Code Jam. Someone wrote a kind of mashup that walks the Google Code Jam submission/score database, and which allows queries e.g. per programming language. Here's the statistics for Lisp:. Http:/ www.go-hero.net/jam/09/lang/Lisp. PERT knowl...
blog.simon.leinen.ch
From the Fiber Trenches to the Clouds: March 2008
http://blog.simon.leinen.ch/2008_03_01_archive.html
From the Fiber Trenches to the Clouds. Thursday, March 27, 2008. Rant on DNS and TCP (SwiNOG post reprint). Since the "routine" thing didn't work, I'm trying something different. so here's a "reprint" of a missive I just sent to the SwiNOG. Mailing list - the original article is archived here. If you want to look at the context.]. Until recently only AXFR was using tcp,. I'm not saying this was a good idea :-). Configurations became more important. So IT people and their consultants and ISPs started ...
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