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I wouldn't recommend QuantQuote for your purposes. They only provide the historical/live consolidated feed and IQFeed is better priced for those features.
It's not a seasoned group. I happen to know one of the main persons (a 25 year old physics major out of Caltech) behind QuantQuote through the CERN network and he is currently focused on crowdfunding a secure email product rather than QQ. From what I know of their credentials, they don't have a strong development team. Also, If I'm not wrong, QuantQuote is associated with Sam Barnett's ( Sam Barnett SBB Research Group - Business Insider) group - I don't know for sure but I'm guessing that they are just selling a capture of SBB Research's live data.
Not to stray off-topic, but also look at implementing performance/failover from a software standpoint and not just hardware. Hardware RAID active/active is great and you can build cheap SAN's that do that, but you can also significantly increase performance by using a MySQL cluster.
MariaDB is from the author of MySQL, and they have their Galera cluster product with multi-master active/active support. Combine that with TokuDB engine and you can dramatically improve INSERTs over a typical InnoDB config.
I am considering converting from InnoDB to TokuDB.
OK well that's a shame. I really liked the native Linux client. It seems NxCore is Windows based, like the IQconnect handler.
Any other suggestions where I can get 5000 tickers or so in real-time, and pick-up historical data for any missed ticks or maintenance at the end of the day?
Also really want splits and dividend adjusted data, right now I am handling it all myself using multiple data sources (ie Yahoo) and back adjusting the data, and I would like to eliminate this step.