Gwater has contributed to 4 posts out of 19002 total posts
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Thanks for the info.
Edited by Gwater on Jun 21, 2007 at 10:46 AM
Quote: We don't have any plans to upgrade the satellite bandwidth. The majority of interest in our services for equities data is on the Internet, so that is where we are putting our resources for expansion.Thanks for the info. I had used Dtn Satellite for trading stocks for almost 8 years until switching recently, and it explains a lot of the issues that I had seen worsen over the last couple years, and particularly during fast markets. Switching was tough because dtn satellite had been so good to me for years, but obviously things change in the technology area all the time, and atleast now I don't need southern exposure wherever I live. ;)
--- Original message by DTN_Jay_Froscheiser on Jun 19, 2007 01:37 PM
Quote: Data is sent with various priority levels. Because the available bandwidth is fixed on the satellite, we know if the pipe is full based on how much we are sending. If the data is greater than the pipe, the higher priority data goes out, while the lower priority data is queued or possibly dropped (in extreme situations). Commodity exchange data has a higher priority than stocks on the satellite feed. Thus, there is very little chance that commodity data will ever be queued. Under most regular to heavy market conditions, there is plenty of bandwidth to send every tick for all the data.Do you have plans to upgrade your satellite bandwidth capability (switch satellites or other option) in the near future? It seems you aren't marketing the satellite service for stock customers as well, since its not easy to find info about it on your websites. Is it that you're focusing your resources on your internet datafeed for stock customers, and pretty much just trying to maintain the current stock satellite service for your current customers?
--- Original message by DTN_Jay_Froscheiser on Jun 19, 2007 12:53 PM
Quote: "It is highly likely that you won't get every tick, because satellite is a limited bandwidth delivery method. During peak markets, it is likely that some data will be filtered.
Quote: I've asked this question several times over the phone but could never get a solid answer. Basically I want to be able to stream all 3000+ symbols off nasdaq in real-time tick by tick. Is this possible using the satellite feed? Please outline any drawbacks or issues. I've seen some people saying they are streaming 50,000+ symbols at once from various exchanges but does this include every single tick for each of the symbols? Also how does the historical data stream work? Does it broadcast the data once per night/week/month? And does the historical feed include tick data for all exchanges and symbols and include trades. bids, asks and volume?
--- Original message by anomaly on May 8, 2007 12:26 AM
It is possible to stream all of the data via satellite. It is highly likely that you won't get every tick, because satellite is a limited bandwidth delivery method. During peak markets, it is likely that some data will be filtered. Satellite is also a one-way broadcast feed, with no feedback to the servers. Thus, if you have signal problems (you are guaranteed to have a signal problems at least periodically with Sun Spots or Rain Fade), you won't get data and there is no way to re-request data you missed.
There is zero historical equities information on Satellite. It is a broadcast feed of real time data only. We don't transmit historical chart data over satellite.--- Original message by DTN_Jay_Froscheiser on May 8, 2007 07:51 AM
Could you explain this more...does this mean there isn't enough bandwidth available in the satellite to deliver all of the data during peak markets, and/or the box can not process the bandwidth?
And how does it decide to do that...is data filtered randomly or across markets equally?