How Digg migration to Cassandra from MYSQL - Tekslate - Wattpad

How Digg migration to Cassandra from MYSQL

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Parts 1
Time <5 mins

apache cassandra cassandratraining cassandratutorial

Today I'm gonna share my experience when I started with Apache Cassandra... If you consider the case study of Digg: How Digg migrated their friends+diggs data set to Cassandra from MYSQL, here is the explanation.

Digg implemented their new badges feature in Cassandra, a distributed, structured key-value store. Digg adopted a traditional vertically distributed master-slave configuration with MySQL, and investigated sharding (type of database partitionin) MySQL. In the case of the traditional architecture, Cassandra has a masterless "ring" which is easy to set up and to maintain.

Since it was necessary to strand data normalization and consistency to make these methodologies work. Digg adopted to comfortable with non-relational data stores. With the consideration of HBase, Voldemort, Cassandra, Hypertable, Tokyo Cabinet/Tyrant, and Dynomite, finally migrated on to Cassandra.
Every system has its own pros and cons, but Cassandra has a good blend of all. It offers Data Partitioning, Consistent Hashing, Data Replication, Eventual & Tunable Consistency, Gossip Protocol to discover nodes, Keyspace, Column & Row -oriented data storage, so you have a bit more structure than plain key/value stores. It operates in a distributed, highly available, Cluster/Ring. 
When an item is dugg, Digg asynchronously populates Cassandra. This operation fetches the list of followers of the digging user, and every column is inserted at once, atomically in each of their buckets, under a second.
In my upcoming posts, I will try to explain Cassandra architecture and other topics.All Rights Reserved

apache cassandra cassandratraining cassandratutorial

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How Digg migrated to Cassandra from MYSQL
Wed, Nov 16, 2016

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How Digg migrated to Cassandra from MYSQL
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Slide 1 of 10

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SCP's SCP

This is a story about love and friendship. Friendship can grow so fast, it doesn't matter how long you know that person. If it's right, it's right. Kiara has always been quite lonely. She didn't know what real friendship was like. Until she met Cassandra. Cassandra was that type of friend everyone needs and Kiara was really glad to have Cassandra. They did everything together. Kiara was really depressed before she met Cassandra. She had been bullied and picked on since as long as she can remember. There wasn't even a reason for it and that makes it much worse. After a few years of good friendship, Kiara realized her love for Cassandra took a different turn, she started to have feelings and soon after, she and Cassandra got into a relationship. Life was good. Too good. After graduation, something really really terrible happened. Cassandra got into a car accident. It was really bad. She got into a really bad coma. Now it's three years later and she's still fast asleep. Kiara's life has been on pause ever since. Until- Kiara also got into an accident. Not that kind of accident though.. Kiara accidentally saw things she wasn't supposed to see. Heard things she wasn't supposed to know. The only possible option was to take Kiara with them. And that's when Kiara's life get's off pause. That's when she finally learns how to live again and finally meets people who don't enjoy picking on her. At least.. most of them.. So yeah, this story IS about love and friendship. And about Kiara finding her way.