1,308 questions
Advice
0
votes
2
replies
63
views
How to make devices discover each other using WIFI
What's the best way to allow programs to discover each other on the network?
Let's say we are writing a system that tracks the usage of computers over the network.
We have an agent program that sends ...
- 13
1
vote
1
answer
52
views
How do I redesign a broken multi-service system where the entry point and child services are out of sync?
I recently joined a startup that has a pretty messy backend setup, and I’ve been assigned to sort it out.
Here’s the situation:
There’s one main entry point (a federation/onboarding service) that’s ...
0
votes
1
answer
89
views
Should I store Stripe Subscription details in local DB or query Stripes API to determine if a user is subscribed?
I have the following requirement.
A website (lets call it Website A) where I sell subscription plans for my SaaS
Payments are handled with Stripe
I am using an authentication service (Auth0) so users ...
- 21
0
votes
0
answers
70
views
ADKG-based threshold ECDSA signature recovers different address per transaction—how to compute aggregate `r` and signature parameters?
Background
I’m implementing Asynchronous Distributed Key Generation (ADKG) over secp256k1 so that N nodes collectively hold a threshold private key. After DKG each node has a secret share. To sign an ...
- 121
0
votes
0
answers
37
views
gRPC: HTTP-level resilience handler (retries)?
Should gRPC clients implement an HTTP-level resilience handler? Or only rely on the gRPC-level RetryPolicy? Why/why not?
For example, if the server responds with a 5xx status code (unexpected but ...
- 121
0
votes
0
answers
48
views
Is there a problem having min.insync.replicas < half the RF?
Many examples of Kafka topic configuration have RF = 3, min.insync.replicas = 2.
In the case of a cluster of 5 brokers, if we use RF = 5, should min.insync.replicas = 3? That seems "natural" ...
- 130
0
votes
1
answer
82
views
How do I limit the count of rows in a result set in Postgres without unnecessary locking?
This question is inspired by a 'general admission' variant of the common 'event ticketing' System Design interview question. Critically in this version, the user does not select a seat - they only say ...
- 33
0
votes
0
answers
31
views
How can I ensure this UDF works reliably across nodes if OceanBase scales horizontally?
OceanBase Version:
V4.2
I’m using OceanBase in MySQL mode, and I noticed that functions like NOW() and CURRENT_TIMESTAMP only provide microsecond (6-digit) precision. So I’m trying to create a custom ...
user30195804
0
votes
0
answers
38
views
Proving the Log Matching property in Raft consensus protocol
I have been trying to understand the Raft protocol for quite some time now. One thing that has always stumped me is the proof of the Log Matching property. One of my concerns is that the proof in the ...
- 118
0
votes
0
answers
42
views
How to use socketio and ipc together in python
I am trying to building an server that communicates with the client using socketio protocol, Now the server starts multiple application as a sub processes, the server communicates with this ...
- 70
0
votes
1
answer
66
views
is last write wins redundant for immutable keys?
In the book Designing Data-Intensive Applications > chapter-5 > Leaderless replication > Detecting Concurrent Writes, below is what Author says while talking about Last write wins (LWW)
The ...
- 1,394
0
votes
1
answer
79
views
Apache JMeter Master Slave Setup on Azure VM
I am new to JMeter Distributed Environment setup. I dont have any knowledge on how to setup the master slave configuration. I just have the information that we have a Master VM and we can spin up ...
0
votes
0
answers
33
views
Handling Database Failures in a Distributed System with RabbitMQ Workers
I have a worker that processes tasks from RabbitMQ and inserts data into a database. The system operates at high scale, handling thousands of messages per second, which makes proper failure handling ...
- 19
0
votes
0
answers
46
views
Why does Lamport's Distributed Mutual Exclusion Algorithm require the reply's timestamp to be greater than the request's timestamp?
In Lamport's Distributed Mutual Exclusion algorithm, a process can enter the critical section if two conditions are met:
Its request is at the head of its own queue.
It has received a reply from all ...
- 51
1
vote
0
answers
28
views
In which cases Multi-Paxos couldn't support Primary Order required in Primary-Backup replication system?
In paper Zab: High-performance broadcast for primary-backup systems, the figure 1 shows that Paxos could violate primary order of requests.
I understand the result will be like that if each proposer ...
- 313