taigrr/nats.docs
1
0
Fork 0
mirror of https://github.com/taigrr/nats.docs synced 2025-01-18 04:03:23 -08:00
Code Issues Projects Releases Wiki Activity
nats.docs/developer/reconnect/random.md
Stephen Asbury cc850776b8 Cleaned up developer doc 
Proof'd everything and improved flow
Renamed advanced to events
Reordered sending/receiving
Added text type to languages for prism plugin
2019-05-16 13:06:37 -07:00

740 B
Raw Blame History

Avoiding the Thundering Herd

When a server goes down, there is a possible anti-pattern called the Thundering Herd where all of the clients try to reconnect immediately creating a denial of service attack. In order to prevent this, most NATS client libraries randomize the servers they attempt to connect to. This setting has no effect if only a single server is used, but in the case of a cluster, randomization, or shuffling, will ensure that no one server bears the brunt of the client reconnect attempts.

However, if you want to disable the randomization process, so that servers are always checked in the same order, you can do that in most libraries with a connection options:

!INCLUDE "../../_examples/reconnect_no_random.html"