zsedem

trait DynamoWriteItem {
  def id: String
}

trait DynamoService {
  def writeBatch(dynamoWriteItems: List[DynamoWriteItem]): Future[Either[List[DynamoWriteItem], Done]]
}

object DynamoWriteStream {
  def batchedFlow[PassThrough](

zsedem

import java.util.concurrent.atomic.AtomicInteger
import java.util.concurrent.{ArrayBlockingQueue, ThreadPoolExecutor, TimeUnit}

import akka.actor.ActorSystem
import akka.http.scaladsl.Http
import akka.http.scaladsl.model.{HttpRequest, HttpResponse}
import akka.http.scaladsl.server.Directives._
import akka.stream.ActorMaterializer
import akka.stream.scaladsl.{Keep, Sink}

zsedem

Prototype version 15
Found device 138a:0097

step 1
usb write:
0000 01
usb read:
0000 00 00 f0 b0 5e 54 a4 00  00 00 06 07 01 30 00 01
0010 00 00 61 13 88 35 41 9d  00 23 00 00 00 00 01 00
0020 00 00 00 00 00 07

zsedem

# I have 3 btrfs subvolume /root, /home, /nix-store and these are used as the name suggest
# Now, when i create new nixos configuration i can make a snapshot of root and home, before i switch to a new config.

CURRENT_GENERATION=`readlink /nix/var/nix/profiles/system | cut -d'-' -f2`; echo Determined current generation: $CURRENT_GENERATION
sudo mkdir -p /btrfs
# the / is not mounted in my btrfs filesystem by default, because my filesystem root is the /root subvolume
sudo mount /dev/mapper/NixOS /btrfs
sudo btrfs subvolume snapshot /btrfs/root /btrfs/root-$CURRENT_GENERATION-snapshot
# I also make a snapshot of home, because i use gnome or KDE, which contains a lots of config and cache, which can broke by a rollback.
sudo btrfs subvolume snapshot /btrfs/home /btrfs/home-$CURRENT_GENERATION-snapshot