dldinternet

btrfs fi show -d

  Label: '2019.02.19-20:17:48 v23824'  uuid: 7c19084c-9c53-4cea-b287-0e1a43e6860b
    Total devices 1 FS bytes used 13.95TiB
    devid    1 size 29.07TiB used 23.18TiB path /dev/md2


syno_poweroff_task -d
(Interrupt this after a while to prevent losing SSH completely)

dldinternet

# Copyright (c) 2018 Bao Nguyen <b@nqbao.com>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all

dldinternet

import smtplib
import socket

def send(server='smtp-mail.outlook.com', port='587', msg):
    # contain following in try-except in case of momentary network errors
    try:
        # initialise connection to email server, the default is Outlook
        smtp = smtplib.SMTP(server, port)
        # this is the 'Extended Hello' command, essentially greeting our SMTP or ESMTP server
        smtp.ehlo()

dldinternet

import os
from email.mime.text import MIMEText
from email.mime.image import MIMEImage
from email.mime.application import MIMEApplication
from email.mime.multipart import MIMEMultipart

def message(subject="Python Notification", text="", img=None, attachment=None):
    # build message contents
    msg = MIMEMultipart()
    msg['Subject'] = subject  # add in the subject

dldinternet

Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

dldinternet

require "google/cloud/monitoring/v3/metric_service_client"
client = Google::Cloud::Monitoring::V3::MetricServiceClient.new
project_path = Google::Cloud::Monitoring::V3::MetricServiceClient.project_path JSON.load(File.read ENV["GOOGLE_APPLICATION_CREDENTIALS"])["project_id"]

create_custom_gauge_metric = lambda do |type, display_name, value_type, labels = {}|
  metric_descriptor = Google::Api::MetricDescriptor.new(                                  # googleapis-common-protos-1.3.5/lib/google/api/metric_pb.rb
    type: "custom.googleapis.com/#{type}",
    metric_kind: :GAUGE,                                                                  # google-cloud-monitoring-0.24.0/lib/google/cloud/monitoring/v3/doc/google/api/metric.rb
    value_type: value_type,                                                               # google-cloud-monitoring-0.24.0/lib/google/cloud/monitoring/v3/doc/google/api/metric.rb
    display_name: display_name,

dldinternet

# vim: ft=sh:ts=4:sw=4:autoindent:expandtab:
# Author: Avishai Ish-Shalom <avishai@fewbytes.com>

# We need to specify GNU sed for OS X, BSDs, etc.
if [[ "$(uname -s)" == "Darwin" ]]; then
    SED=gsed
else
    SED=sed
fi

dldinternet

New Ruby software project procedure

First, ensure the following tools are available on the local system and reasonably up to date:

• Git
• Git-flow
• RVM
• Bash
• SSH