Pranav Sethi iampranavsethi

Last updated: 2017-03-18

Searching for Files

Find images in a directory that don't have a DateTimeOriginal

exiftool -filename -filemodifydate -createdate -r -if '(not $datetimeoriginal) and $filetype eq "JPEG"' .

###Output photos that don't have datetimeoriginal to a CSV### Note this can take a long time if you have a lot of jpgs

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

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.

	/*
	This has been tested in Chrome v55.0.2883.95 (64-bit)

	1. Log into ADP website using the URL: https://my.adp.com/static/redbox/login.html (Make sure you are NOT in Incognito mode)
	2. Open Developer Tools console
	3. Run the following code in the console:
	*/

	var xhr = new XMLHttpRequest();
	xhr.open('GET', 'https://my.adp.com/v1_0/O/A/payStatements?adjustments=yes&numberoflastpaydates=300');

	// this code assumes a credit card is valid in the current month
	var validateDate = function () {
	var creditCardDate = moment($scope.data.expirationYear+$scope.data.expirationMonth, "YYMM");
	var today = moment();

	return creditCardDate.isValid() && (today < creditCardDate.add(1, 'months'));
	}

	## Place this file in "/etc/sysctl.d/network-tuning.conf" and
	## run "sysctl -p" to have the kernel pick the new settings up

	# Avoid a smurf attack
	net.ipv4.icmp_echo_ignore_broadcasts = 1

	# Turn on protection for bad icmp error messages
	net.ipv4.icmp_ignore_bogus_error_responses = 1

	# Turn on syncookies for SYN flood attack protection

	## From a post on the ML, apropos this:
	## http://lowlatencyweb.wordpress.com/2012/03/20/500000-requestssec-modern-http-servers-are-fast.
	## For sysctl.conf

	net.ipv4.tcp_slow_start_after_idle = 0


	echo "2048 64512" > /proc/sys/net/ipv4/ip_local_port_range
	echo "1" > /proc/sys/net/ipv4/tcp_tw_recycle
	echo "1" > /proc/sys/net/ipv4/tcp_tw_reuse

	# Add a scheduled sync task at 4:00 am
	# Some privileges should be granted to `cron` manually, so you may test `* * * * *` (run every second) first to grant the needed privileges in advance
	0 4 * * * osascript /path/to/your/sync-from-chrome-to-safari.scpt