3 starting points: - DO NOT migrate your tables as they are in Oracle to Cassandra. In most cases, you need a different model for Cassandra
- DO take the (free) DataStax Academy courses to learn much more about Cassandra as you dive in. It is a systematic and bite-size approach to learning all things Cassandra (and eventually, DataStax Enterprise, should you go that way). However, open source Cassandra is fine as a data platform. DSE gives you more options for data models, better administration and monitoring tools, support, etc. It all depends on what you need/want to build/can afford - Cluster sizing depends on your goals for the data platform. Do you need lots of storage, lots of throughput, high availability, low latency, workload separation, etc.? A couple guidelines – use at least 3 nodes per data center (DC) and at least 2 DCs for availability. Use SSDs for storage and keep node size 3 TB or less for reasonable administration. If six nodes are too many – you probably don’t need Cassandra. If you can define what you need your data platform to deliver, then you can start a sizing discussion. The good thing is, you can always scale (as long as the data model is good). Sean Durity From: sha p <shatestt...@gmail.com> Sent: Wednesday, September 05, 2018 9:21 AM To: user@cassandra.apache.org Subject: [EXTERNAL] Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra. Hi all , Me new to Cassandra , i was asked to migrate data from Oracle to Cassandra. Please help me giving your valuable guidance. 1) Can it be done using open source Cassandra. 2) Where should I start data model from? 3) I should use java, what kind of jar/libs/tools I need use ? 4) How I decide the size of cluster , please provide some sample guidelines. 5) this should be in production , so what kind of things i should take care for better support or debugging tomorrow? 6) Please provide some good books /links which can help me in this task. Thanks in advance. Highly appreciated your every amal help. Regards, Shyam ________________________________ The information in this Internet Email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this Email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this Email are subject to the terms and conditions expressed in any applicable governing The Home Depot terms of business or client engagement letter. The Home Depot disclaims all responsibility and liability for the accuracy and content of this attachment and for any damages or losses arising from any inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other items of a destructive nature, which may be contained in this attachment and shall not be liable for direct, indirect, consequential or special damages in connection with this e-mail message or its attachment.
