# ZMQ CONFLATE Option
**URL:** https://discourse.julialang.org/t/zmq-conflate-option/94800
**Category:** General Usage
**Tags:** zmq
**Created:** [February 17, 2023, 5:38pm UTC](https://discourse.julialang.org/t/zmq-conflate-option/94800 "2023-02-17T17:38:28Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@hanshinlee77](https://discourse.julialang.org/u/hanshinlee77)
#### Post date: [February 17, 2023, 5:38pm UTC](https://discourse.julialang.org/t/zmq-conflate-option/94800/1 "2023-02-17T17:38:28Z")
Hi,
I am using ZMQ.jl for a PUB-SUB socket operation. Occasionally, the operation gets into a situation where the subscriber becomes slow and as a result the messages from the publisher accumulates in the subscriber’s buffer. Ideally, I would like to discard old messages so that the subscriber only gets the last message sent.
After some googling, there is an option called CONFLATE, but I do not find it in ZMQ.jl. I do have the latest ZMQ.jl (v1.2.2).
Does anyone know whether this option is implemented and if so how I can use this option?
Thanks,
Hanshin
---
### Author:  [@stevengj](https://discourse.julialang.org/u/stevengj)
#### Post date: [February 17, 2023, 5:57pm UTC](https://discourse.julialang.org/t/zmq-conflate-option/94800/2 "2023-02-17T17:57:27Z")
There’s no high-level interface for it in ZMQ.jl, though in principle you could call `zmq_setsockopt` directly via `ccall`.
I just pushed a draft PR that adds a `conflate` property to the `ZMQ.Socket` type that you can get/set, however: [add ZMQ\_CONFLATE by stevengj · Pull Request #222 · JuliaInterop/ZMQ.jl · GitHub](https://github.com/JuliaInterop/ZMQ.jl/pull/222) … try it out and let us know if it works for you.
---
### Author:  [@hanshinlee77](https://discourse.julialang.org/u/hanshinlee77)
#### Post date: [February 21, 2023, 4:43pm UTC](https://discourse.julialang.org/t/zmq-conflate-option/94800/3 "2023-02-21T16:43:20Z")
Thanks very much. I appreciate adding this. I will try it out!