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If the 2nd server once again reaches 80% capacity and testing indicates that there is still performance headroom on parallel writes and with the SQL Server, then continue to repeat the process of adding additional servers until:
1)Rate limiting becomes unavoidable
2)The SQL Server begins to show strain, particularly in the I/O subsystem
3)Throughput is sufficient for the project and additional servers would add unacceptable administrative overhead
4)The cost to operate additional processing servers is unacceptable
Once one of the above conditions has been reached, then there is no need to continue adding processing servers.
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To increase parallel writes, follow this procedure:
1) In the SkySync management application click the settings icon in the upper right corner:
2)Click on the performance tab in the SkySync configuration window:
3)Increase or decrease parallel writes as necessary by (1) or (2) at a time.
Parallel writes can be increased as long as rate limiting is not observed and as long as performance continues to increase. If performance does not continue to increase or if rate limiting begins to happen then parallel writes should be decreased.
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