amazon web services - Equivalent for Kafka / AWS Kinesis Stream on Google Cloud Platform -


i'm building app appending buffer while many readers consume buffer independently (write-once-read-many / worm). @ first thought of using apache kafka, prefer as-a-service option started investigating aws kinesis streams + kcl , seems can accomplish task them.

basically need 2 features: ordering (the events must read in same order readers) , ability choose offset in buffer reader starts consuming onwards.

now i'm evaluating google cloud platform. reading documentation seems google pub/sub suggested equivalent aws kinesis stream, @ more detailed level these products seem lot different:

  • kinesis guarantees ordering inside shard, while on pub/sub ordering on best-effort basis;
  • kinesis has buffer (limited max 7 days) available readers, can use offset select starting reading position, while on pubsub messages after subscription available consuption.

if got right, pubsub cannot considered kinesis equivalent. perhaps if used google dataflow? must confess still can't see how.

so, pubsub alternative kinesis? if not, there google cloud product fulfill requirements?

thanks!

a rather convoluted solution might help:

  • push events using pub/sub single topic. @ point unordered.
  • create cloud dataflow streaming pipeline reads pub/sub topic. have streaming writes cloud bigquery, add timestamp each table entry.
  • have readers queries on bq table, order timestamp have consistent order. can use row_number offset.

hope helps.


Comments

Post a Comment

Popular posts from this blog

angular - Ionic slides - dynamically add slides before and after -

hi i'm using ngfor create set of 3 slides while starting in middle i'm guaranteed able slide left or right on start. when slide right can simple listen reachedend , push slide array i'm looping. but have problem adding slide beginning. if same above , use e.g. array.unshift() or spread add item beginning, view think it's on position 0 , snaps view new slide. the code below work animates slide change index 1. slide = [0,1,2] //example loop slidechanged(event) { if(this.slides.isbeginning()){ this.slide = [this.slide[0]-1, ...this.slide]; this.slides.update(); this.slides.slideto(1) } } <ion-slides [initialslide]="1" (ionslidedidchange)="slidechanged($event)"> <ion-slide *ngfor="let item of slide"> <h1>slide {{item}}</h1> </ion-slide> </ion-slides> any appreciated! you can using ionslidenextend , ionslideprevend events slides . please
Read more

minify - Minimizing css files -

i want know how css files can minimized. currently, using external sites css minifier compress css files. however, after removing whitespaces, comments, etc, file sizes reduced 10-15%. how frameworks bootstrap manage make minimized versions kilobytes. as example, css is: body { background-color: #ff0; } the reduction goes 28 bytes 22 bytes other css files have lot more characters still smaller this. actually minifying code means it's remove thing code white space characters new line characters comments block delimiters it reduces amount of code has transferred on web , speed site load fastly.but unreadable format.
Read more

Add a dynamic header in angular 2 http provider -

i have http interceptor built via tutorial https://scotch.io/@kashyapmukkamala/using-http-interceptor-with-angular2 the problem need have dynamic header changes automatically once changes 'mode' in app. service able tell interceptor change header, or have interceptor pull header (which string)from service each request. able throwing away patch method, call http.patch('new header string') set header string. call in service controls 'mode' setting. wondering if there way interceptor pull recent value service each request or if can add method http provider via interceptor? i've tried call service in interceptor each request returns undefined. because creating new instance of service or copying value before service fired , loaded/changed data. i don't want pass header string every http provider call because defeats purpose of having interceptor, id able set once changes or have provider fetch service before makes request. tl;dr : need add autom
Read more