databus | Source-agnostic distributed change data capture system
kandi X-RAY | databus Summary
kandi X-RAY | databus Summary
[Join the chat at In Internet architectures, data systems are typically categorized into source-of-truth systems that serve as primary stores for the user-generated writes, and derived data stores or indexes which serve reads and other complex queries. The data in these secondary stores is often derived from the primary data through custom transformations, sometimes involving complex processing driven by business logic. Similarly, data in caching tiers is derived from reads against the primary data store, but needs to get invalidated or refreshed when the primary data gets mutated. A fundamental requirement emerging from these kinds of data architectures is the need to reliably capture, flow and process primary data changes. We have built Databus, a source-agnostic distributed change data capture system, which is an integral part of LinkedIn’s data processing pipeline. The Databus transport layer provides latencies in the low milliseconds and handles throughput of thousands of events per second per server while supporting infinite look back capabilities and rich subscription functionality.
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Top functions reviewed by kandi - BETA
- Process a databus request
- Constructs a filter based on a set of databus subscriptions
- Converts JSON string to DBusKeyFilter config map
- Converts a generic JSONObject to DbusKeyFilter object
- The main entry point
- Helper method to parse comma - separated list of arguments
- Splits a partition into a set of partitions
- Prints usage information
- Process a Databus request
- Process the request
- Called when a message is received
- Returns a string representation of this event
- Finds the file that contains the scn file
- Entry point for the command line tool
- Command line parser
- Gets the latest timestamp
- Synchronized
- This method is used to repair the bootstrap checkpoints
- Decodes a single command
- Runs the producer
- Reads events from all sources
- Main loop
- Performs the actual processing of a DatabusRequest
- Adds an event to the buffer
- Runs the binlog events
- Handles a databus message
databus Key Features
databus Examples and Code Snippets
Community Discussions
Trending Discussions on databus
QUESTION
I have a simple program. I am trying to input the counter output into a memory address register and output the data that is in the memory address register.
Memory Address Register Code:
...ANSWER
Answered 2022-Apr-15 at 15:21This is the logic for writing to your memory address output register inside your 'MAR' component:
QUESTION
I have created a basic module that is meant to represent a unit of memory in Chisel3:
...ANSWER
Answered 2021-Dec-02 at 04:17Drakinite's comment is correct. You need to make sure to step the clock in order to see the register latch the value. I tweaked your test to include a couple of steps and it works as expected:
QUESTION
I have a program where I need to read and write data to a common (central?) object from most other obejcts. In a way it acts like a database or perhaps databus if you like. I cannot write it to a file. Currently I do it like this:
...ANSWER
Answered 2021-Feb-18 at 15:09The real answer is "don't".
You can use the Singleton pattern; but, by doing so you are avoiding "object oriented programming" which is the method that Java uses to make the programs maintainable and repairable.
Once you have a single, central object, you can't modify your code easily in many ways without investigating how the central object is impacted, and then investigating how all the other objects that also use the central object are impacted through the central object.
Instead create an object for each scenario. This allows you to process two scenarios at a time, which will make life easier when you start to make your programs multi-threaded, something you'll want to do sooner or later, because otherwise you'll only use 1 core in that 8 core processor.
Your language assumes a central object, so I can't provide an example in your scenario. I'll modify Commmon to Context where Context means "the scenario I'm dealing with now".
Note that with such a change, you probably shouldn't own the context, you should pass it along.
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