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https://issues.apache.org/jira/browse/SAMOA-40?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14956488#comment-14956488
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ASF GitHub Bot commented on SAMOA-40:
-------------------------------------
Github user abifet commented on the pull request:
https://github.com/apache/incubator-samoa/pull/32#issuecomment-147974180
@gdfm, @karande I think that the code has improved a lot and it's already
there. My main concern right now is how to read sparse instances in the sparse
instance format ( like "{1 0.24, 434 0.34, 500:1}") and not only in the dense
instance format (like "0.223, .2323, 1").
The code to convert strings to dense and sparse instances is in
org.apache.samoa.instances.ArffLoader, and it uses java.io.Reader to get the
raw data. One way to do this could be that KafkaReader extends Reader, and then
use ArffLoader to get the instances using the KafkaReader.
> Add Kafka stream reader modules to consume data from Kafka framework
> --------------------------------------------------------------------
>
> Key: SAMOA-40
> URL: https://issues.apache.org/jira/browse/SAMOA-40
> Project: SAMOA
> Issue Type: Task
> Components: Infrastructure, SAMOA-API
> Environment: OS X Version 10.10.3
> Reporter: Vishal Karande
> Priority: Minor
> Labels: features
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> Apache SAMOA is designed to process streaming data and develop streaming
> machine learning
> algorithm. Currently, SAMOA framework supports stream data read from Arff
> files only.
> Thus, while using SAMOA as a streaming machine learning component in real
> time use-cases,
> writing and reading data from files is slow and inefficient.
> A single Kafka broker can handle hundreds of megabytes of reads and writes
> per second
> from thousands of clients. The ability to read data directly from Apache
> Kafka into SAMOA will
> not only improve performance but also make SAMOA pluggable to many real time
> machine
> learning use cases such as Internet of Things(IoT).
> GOAL:
> Add code that enables SAMOA to read data from Apache Kafka as a stream data.
> Kafka stream reader supports following different options for streaming:
> a) Topic selection - Kafka topic to read data
> b) Partition selection - Kafka partition to read data
> c) Batching - Number of data instances read from Kafka in one read request to
> Kafka
> d) Configuration options - Kafka port number, seed information, time delay
> between two read requests
> Components:
> KafkaReader - Consists for APIs to read data from Kafka
> KafkaStream - Stream source for SAMOA providing data read from Kafka
> Dependencies for Kafka are added in pom.xml for in samoa-api component.
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