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In prior versions increasing the number of nodes implied: high availability, but also horizontally scaling crawl capacity , which in some cases high availability was desired, but without increasing the crawl throughput. So if you had 2 Aspire nodes, you had twice the capacity of a single server.

In Aspire 5.0 you can separate the high availability requirements from the craw crawl capacity requirements, by allocating only the number of worker nodes needed to match your required throughput.

For high availability it is recommended to have at least 2 manager nodes, as if one fails, the other one can assume the work from the failed one.

Resource requirements:

These recommendations are based on usual workloads, fine tuning is recommended specially especially if the workload consists of large files (over 100MB of average size)

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