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@tobilg
tobilg / transform-arrow.ts
Last active August 21, 2024 10:41
import { Table, Vector, Field, Utf8, Type, Schema } from 'apache-arrow';
/**
* Cast all columns with complex data types in an Apache Arrow Table to strings
* @param {Table} table - The Apache Arrow Table
* @returns {Table} - A new Table with all complex data type columns cast to strings
*/
function castComplexColumnsToString(table: Table): Table {
const schemaFields = table.schema.fields;
@tobilg
tobilg / find_lambda_at_edge_logs.sh
Last active January 26, 2024 18:26
Use it like this: ./find_lambda_at_edge_logs.sh YOUR_FUNCTION_NAME
#!/bin/bash
FUNCTION_NAME=$1
for region in $(aws --output text ec2 describe-regions | cut -f 4)
do
echo "Checking $region"
for loggroup in $(aws --output text logs describe-log-groups --log-group-prefix "/aws/lambda/us-east-1.$FUNCTION_NAME" --region $region --query 'logGroups[].logGroupName')
do
echo "Found '$loggroup' in region $region"
for logstream in $(aws --output text logs describe-log-streams --log-group-name $loggroup --region $region --query 'logStreams[].logStreamName')
@tobilg
tobilg / Serverless Lambda@Edge execution role
Last active January 9, 2022 10:53
{
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2012-10-17",
"Statement": [{
"Effect": "Allow",
"Principal": {
"Service": [
"lambda.amazonaws.com",
@tobilg
tobilg / awsRegions.json
Last active January 25, 2024 23:41
Data is sourced from https://github.com/tobilg/aws-edge-locations and https://aws.amazon.com/about-aws/global-infrastructure/regions_az/#Region_Maps_and_Edge_Networks
{
"us-east-1": {
"city": "Ashburn",
"state": "Virginia",
"country": "United States",
"countryCode": "US",
"latitude": 38.9445,
"longitude": -77.4558029,
"region": "North America",
"iataCode": "IAD"
@tobilg
tobilg / docker_hub_stats.sh
Last active January 12, 2018 16:41
Get the Docker Hub statistics for a specific user's images as CSV. Needs curl and jq installed. Usage: ./docker_hub_stats.sh yourUserName
#!/bin/bash
curl -s https://hub.docker.com/v2/repositories/$1/\?page_size\=1000 | jq -r '["user", "name", "description", "star_count", "pull_count"] as $fields | $fields, (.results[] | [.[$fields[]]]) | @csv'
@tobilg
tobilg / custom_s3_endpoint_in_spark.md
Last active July 31, 2024 10:22
Description on how to use a custom S3 endpoint (like Rados Gateway for Ceph)

Custom S3 endpoints with Spark

To be able to use custom endpoints with the latest Spark distribution, one needs to add an external package (hadoop-aws). Then, custum endpoints can be configured according to docs.

Use the hadoop-aws package

bin/spark-shell --packages org.apache.hadoop:hadoop-aws:2.7.2

SparkContext configuration

@tobilg
tobilg / run_multiple_phantomjs_instances.js
Last active December 22, 2015 15:39
Async usage of multiple PhantomJS instances with NodeJS
var phantom = require('phantom');
var async = require('async');
var pagesToCall = [
['http://www.google.com', 8000],
['http://www.allthingsd.com', 8001],
['http://www.wired.com', 8002],
['http://www.mashable.com', 8003],
['http://www.stackoverflow.com', 8004]
];