Monday, October 21, 2019

Open source RDBMS: When To Use PostgreSQL

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Given a choice to look for open-source RDBMS which provides most of the persistent capabilities, PostgreSQL comes as the one of the preferr...
Wednesday, September 25, 2019

Performance Testing using Jmeter

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Jmeter offers testing of resources which are both static or dynamic in nature. For e.g. -Static pages, javascript , html -Dynamic conte...
Sunday, September 15, 2019

Elastic Search Aggregation

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ES Provides aggregated data based on  a search query. Aggregation Structure: "aggregations" : {     "<aggregation_na...

Elastic Search Analyzer

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During query processing, the content is analysed by the analysis module. It consists of  analyzer, tokenizer, tokenfilters and charfilters...
Sunday, September 8, 2019

Elastic Search - Update Indexed Data

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POST twitter/_update_by_query {   "script": {     "source": "ctx._source.likes++",     "lang...

Elastic Search Re-indexing Data

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POST _reindex { "source" : { "index" : "twitter" }, "dest" : { "i...
Friday, August 16, 2019

Flow Control in RabbitMQ

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Flow Control is used to apply rate limiting when the publisher is sending messages with very high rate that RabbitMQ can not handle it. - ...
Thursday, August 1, 2019

Auto Scaling in AWS

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Why is the need of Auto Scaling? When there is huge traffic, network load balancer suits best for high performance. The running serv...

RabbitMQ : Best practices

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-Use separate connections for publishing/consuming/administrating messages. -Messages can be sent directly to exchange(direct/fanout) with r...
Sunday, April 14, 2019

RabbitMQ Retry mechanism using Dead Letter Exchanges

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Dead Letter Exchange takes care of Expired and Rejected Messages Creating a Dead Letter Exchange: Steps: -Create new FANOUT exchange ...

RabbitMQ : High Availability (HA) Queues

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In this blog, We will talk about a very important feature provided by RabbitMQ, High Availability suing data replication. ...