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10 parameters for Big Data networks

Big Data and Hadoop clusters involve heavy volume of data and in many instances high velocity in bursty traffic patterns. With these clusters finding in-roads in enterprise data centers, the network designers have a few more requirements to take care. Listed below are 10 parameters to evaluate while designing a network for Big Data and Hadoop cluster.

10) Available and resilient

- Allows network designs with multiple redundant paths between the data nodes than having one or two points of failure.
- Supports upgrades without any disruption to the data nodes

9) Predictable

- Right sizing the network configuration (1GbE/10GbE/100GbE switch capacity) to achieve predictable latency in network
- real time latency may not be required for batch processing

8) Holistic network

- one network can support all workloads : Hadoop, NoSQL, Warehouse, ETL, Web
- support Hadoop and existing storage systems like DAS, SAN, or NAS

7) Multitenant

- be able to consolidate and centralize Big Data projects
- have capability to leverage the fabric across multiple use cases

6) Network partitioning

- support separate Big Data infrastructure from other IT resources on the network
- support privacy and regulatory norms

5) Scale Out

- provide seamless transition as projects increase in size and number
- accommodate new traffic patterns and larger, more complex workloads

4) Converged/ unified fabric network

-  target a flatter and converged network with Big Data as an additional configurable workload
- provide virtual chassis architecture with provision to logically manage access to multiple switches as a single device

3) Network intelligence

- carry any-to-any traffic flows of a Big Data as well as traditional cluster over an Ethernet connection
-  manage single network fabric irrespective of data requirements or storage design

2) Enough bandwidth for data node network

- provision data nodes with enough bandwidth for efficient job completion
- do cost/benefit trade-off on increasing data node uplinks

1) Support bursty traffic

- support loading files into HDFS which triggers replication of data blocks or writing mapper output files and lead to higher network use in a short period of time causing bursts of traffic in the network.
- provide optimal buffering in network devices to absorb bursts


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