Let's look at some basic kubectl output options.
Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).
We can start with:
kubectl get no
PNConfiguration pnc = new PNConfiguration() | |
.setSubscribeKey("subscribeKey") | |
.setPublishKey("publishKey") | |
.setSecretKey("secretKey"); | |
PubNub pubnub = new PubNub(pnc); | |
pubnub.grant() | |
.channels(Arrays.asList("coolChannel", "coolchannel2")) | |
.authKeys(Arrays.asList("authKey1", "authKey2")) | |
.read(true) |
#!/bin/sh | |
# Make sure to: | |
# 1) Name this file `backup.sh` and place it in /home/ubuntu | |
# 2) Run sudo apt-get install awscli to install the AWSCLI | |
# 3) Run aws configure (enter s3-authorized IAM user and specify region) | |
# 4) Fill in DB host + name | |
# 5) Create S3 bucket for the backups and fill it in below (set a lifecycle rule to expire files older than X days in the bucket) | |
# 6) Run chmod +x backup.sh | |
# 7) Test it out via ./backup.sh |
Below are many examples of function hoisting behavior in JavaScript. Ones marked as works
successfuly print 'hi!' without errors.
To play around with these examples (recommended) clone them with git and execute them with e.g. node a.js
(I may be using incorrect terms below, please forgive me)
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)Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta http-equiv="Content-type" content="text/html; charset=utf-8" /> | |
<title>Stripe Sample Form</title> | |
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script> | |
<script type="text/javascript" src="https://ajax.aspnetcdn.com/ajax/jquery.validate/1.8.1/jquery.validate.min.js"></script> | |
<script type="text/javascript" src="https://js.stripe.com/v1/"></script> | |
<script type="text/javascript"> |