01/13/2012. From a lecture by Professor John Ousterhout at Stanford, class CS140
Here's today's thought for the weekend. A little bit of slope makes up for a lot of Y-intercept.
[Laughter]
https://en.wikipedia.org/wiki/SOLID_(object-oriented_design)
# Last updated: 08/24/2916 | |
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# Total instructions available: 18 | |
# | |
# https://docs.docker.com/engine/reference/builder/ | |
# | |
# You can use a .dockerignore file in the same context directory as | |
# your Dockerfile to ignore files in the context before sending them | |
# to the Docker daemon for building to speed up building. |
A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."
{ | |
"1": "7642c4c2e24b176ed442153e3097e819bf5ca80e", | |
"2": "b3d784bbaf1286612ad44308231aa58350da17a6", | |
"3": "a05cb173c1ba1c6ae30bcf5edbd5d5e19566e764", | |
"4": "55d264f8671b50b5dbaffa56d1ee719fd429e8f4", | |
"5": "478ec952d186329f825db4ee7978e31dd42de622", | |
"6": "e82bd73e8c188d151ed790b5ad5a24fa01533fa0", | |
"7": "28a9dfb84ef81592f21ed285d7cf09be0b605988", | |
"8": "e98c13fc9df6a893efa0c57bcfa548be664ab8c8", | |
"9": "af316e6df5bded14f9b268fcbffe7892eb5f244c", |
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
Magic words:
psql -U postgres
Some interesting flags (to see all, use -h
or --help
depending on your psql version):
-E
: will describe the underlaying queries of the \
commands (cool for learning!)-l
: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)M[16],X=16,W,k;main(){T(system("stty cbreak") | |
);puts(W&1?"WIN":"LOSE");}K[]={2,3,1};s(f,d,i | |
,j,l,P){for(i=4;i--;)for(j=k=l=0;k<4;)j<4?P=M | |
[w(d,i,j++)],W|=P>>11,l*P&&(f?M[w(d,i,k)]=l<< | |
(l==P):0,k++),l=l?P?l-P?P:0:l:P:(f?M[w(d,i,k) | |
]=l:0,++k,W|=2*!l,l=0);}w(d,i,j){return d?w(d | |
-1,j,3-i):4*i+j;}T(i){for(i=X+rand()%X;M[i%X] | |
*i;i--);i?M[i%X]=2<<rand()%2:0;for(W=i=0;i<4; | |
)s(0,i++);for(i=X,puts("\e[2J\e[H");i--;i%4|| | |
puts(""))printf(M[i]?"%4d|":" |",M[i]);W-2 |
There was a [great article][1] about how react implements it's virtual DOM. There are some really interesting ideas in there but they are deeply buried in the implementation of the React framework.
However, it's possible to implement just the virtual DOM and diff algorithm on it's own as a set of independent modules.
For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.
Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon
with HyperThreading enabled, but it can work without problem on slower machines.
You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.