Hi, Could someone please help me understand the benefits of having a single large cluster vs. having two smaller clusters separated by the pattern of use? One, MOSTLY WRITE cluster could incrementally accumulate large amounts of data throughout the day. The daily increment would be processed, summarized and stored into the second READ cluster at night. Users would only need to interact with the READ portion of the overall system mostly during the day. Writes would be spread throughout the day and will be a function of user activity with some bulk load activity from time to time. WRITE portion of the database would be an order of magnitude larger than the READ portion. READ portion would have an an order of magnitude higher traffic except during periodic bulk loads.
On one hand, If I were to have a single cluster I would have more resources for the users and potentially better scalability. A single cluster may need fewer servers overall, provided write activity does not affect reads... On the other hand, write activity and associated memory consumption, GC, as well as maintenance riutines may affect READ system. The system will be hosted on EC2. I would appreciate any thoughts. Regards, Oleg
