And this?
http://www.waterstechnology.com/ins...2215166/cme-upgrade-targets-latency-variation
"CME Upgrade Targets Latency Variation
Author: Max Bowie
Source: Inside Market Data | 10 Oct 2012
Categories: Exchange Data | Latency
Topics: dataIMD2012Oct8CME GROUPLatency
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CME Group is rolling out a new infrastructure and order gateways, dubbed CME Globex Performance Release, to increase tradersâ confidence in trade execution by reducing the variability and unpredictability of latency figures between order handling and publication of trade data.
The exchange will migrate products from its legacy infrastructure to the new release over the course of seven weekendsâa process that started at the end of August with its core trading engines, which were completely switched over on the weekend of Oct. 6, ahead of an early adopter process for all interested partiesâbefore migrating all FIX sessions to the new infrastructure on Oct. 13.
âFor us, the problem was the tail. So we are working to eliminate that and make sure that we can deliver the same latency under all market conditionsâ âAri Studnitzer, managing director of enterprise architecture, CME
âOne of the big things we are targeting is around non-implied market data [such as CMEâs equities and currency futures markets], to ensure that order entry and market data delivery are within the same millisecond 99 percent of the time, so that if you are participating in a fill event, you will get the fill and the trade data about that fill within the same millisecond, as it is critical to be able to deliver both at the same time,â says Ari Studnitzer, managing director of enterprise architecture at CME. âFor us, the problem was the tail. So we are working to eliminate that and make sure that we can deliver the same latency under all market conditionsâ¦. If it takes a second to print trade data, there is no point in having order entry latency of 10 microseconds.â
Studnitzer says the effort is not primarily intended to reduce overall latencyâthough this can be a beneficial side effect of the initiativeâbut rather to reduce the variance of latency with which different types of transactions occur in the exchangeâs systems. âLatency is not the goal; itâs the outcome. We measure variability between the median and the 99th percentile of latency. So, for example, weâve been able to reduce the delta to around 100 microseconds for market data dissemination, whereas that was previously measured in multiple milliseconds,â he says. âThe goal of this is not to reduce the median [i.e. headline latency figures], but to reduce variabilityâthough it also means that by doing that, you are reducing those underlying [median] figures.â
The exchange is taking the same approach to order entry, where it previously used hundreds of FIX sessions, each with different loads and fill profiles that could result in different levels of latency performance, by optimizing and reducing the number of FIX sessions and supporting microsecond-level latency measurement to give less variance on the input and output of trade data, Studnitzer says. Next year, the exchange will continue to roll out the enhancements to its implied marketsâsuch as crude oil and eurodollar futuresâwhere Studnitzer says CME aims to achieve the same levels of predictability between the median latency and the 99th percentile.
âFor non-implied markets, the performance release has addressed both items with order entry and market data disseminated in the same millisecond 99 percent of the time. Implied data has improved and will continue to improve going into 2013, with our goal to ensure 99 percent for implied markets in 2013,â he says. âOur goal was to produce order entry and market data in the same millisecond 99 percent of the time, and reduce the delta between the median and 99 percentile latency to 100 microseconds. As an outcome, the median latency for market data is now 50 microseconds.â"
