Comments (4)
Any information on this would be helpful.
from rabbitmq-consistent-hash-exchange.
My 2 cents of feedback, related to the (multiple) requests of @richbria.
In regards to improving the documentation of the routing keys usage, I would suggest adding some link to a consistent-hashing-for-dummies blog post, there are some of them quite comprehensive (example or example). Also, referring to the concept of points as replicas instead/as well, might help understand the usage of the routing keys quicker.
+1 that it would be nice to have a recommendation on the magnitude of points/replicas to use based on the performance implications of the current implementation.
+1 that if would be nice being able to shard based on a segment of the routing key.
from rabbitmq-consistent-hash-exchange.
@arnauorriols I will add your blog post links but consider starting a rabbitmq-users discussion instead of posting +1s here. The problem with +1s is that they rarely lack the important technical details that engineers need, e.g. how do you define "shard" and "segment of the routing key". Thank you.
from rabbitmq-consistent-hash-exchange.
With a single consumer it doesn't matter because the entire hashing ring is allocated to a single "node" (queue in this case). Consistent hashing is based on a range of integer values, not percentage of the ring, historically, and changing that in this plugin would be a breaking change that affects every existing user.
Some understanding of what consistent hashing is is necessary when using this plugin. For those looking to partition a stream of messages across N consumers in a roughly even manner while also trading off total ordering, rabbitmq-sharding would probably be an easier to understand option.
from rabbitmq-consistent-hash-exchange.
Related Issues (20)
- Choosing the seed for generated points in the hash space HOT 6
- Binaries HOT 2
- Move test suite to Common Test
- Handling orphan queues HOT 2
- same message with same routing key goes to different consumer HOT 1
- Routing keys greater than 10 million when the system will lead to memory overflow HOT 3
- Use retries when waiting for Mnesia tables to load HOT 2
- Consistent hash exchange should keep same distribution after server restart HOT 15
- Exchange perfomance HOT 5
- routing to another exchanges HOT 1
- Message routing distribution among queues is not uniformly random HOT 23
- Is header hashing supported? HOT 3
- Queue deletion and binding removal can affect hash ring state consistency HOT 13
- Highly non-uniform distribution of messages over queue when using UUID as routing key HOT 6
- Message Distribution is not uniform (at all) with weights less than 4 HOT 1
- Durable consistent hashing exchange cannot recover their previous state after node restart (3.8.4-specific) HOT 1
- Provide examples in more programming languages HOT 2
- Negative routing key should result in a channel error HOT 3
- Hash on AMQP Message Properties HOT 4
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