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Question by nimesh.jain · Jun 26, 2018 at 07:00 AM · dssdss rest apiendofday request

time for data extraction for instrument prices by dss api

i am trying to extract instrument prices for 50 instruments but it takes lot of time for output. almost 40-50 seconds.

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Answer by Christiaan Meihsl · Jun 27, 2018 at 03:17 AM

@nimesh.jain, yes, if you increase the number of items you can expect the extraction time to increase. Extraction time depends on several parameters:

  • Number of items
  • Number of data fields
  • Date range of the query
  • Amount of data
  • Server load

It is impossible to calculate the time for an extraction, it varies too much. I tried making the same query repeatedly and measuring the extraction time, the variance was high. Experience will give you a feeling for the type of time you can expect.

The obvious rule of thumb is: the more data you request, the longer it will take.

That said, it is more efficient to make one request for many RICs, rather than many requests for few RICs, because of the overhead. See this document for tips on optimizing your requests.

The maximum number of instruments depends on the type of data you request. See this document for a discussion on several limits, and this page for all the limits per data type.

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Answer by Christiaan Meihsl · Jun 26, 2018 at 08:20 AM

@nimesh.jain, you do not mention if you are using the SOAP or REST API, nor what kind of prices or how many fields you are extracting, but I a not surprised by what you observe, 40-50 seconds is the type of performance you can expect from DSS, which is not a real-time product.

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kevinmaximo

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Answer by nimesh.jain · Jun 26, 2018 at 08:46 AM

@Christiaan Meihsl. I am using REST API for extraction. i am extracting 12 fields from the end of day pricing template.

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Christiaan Meihsl ♦♦ · Jun 26, 2018 at 10:04 AM 0
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@nimesh.jain, 40-50 seconds is typical of the type of performance you can expect in this case.

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Answer by nimesh.jain · Jun 27, 2018 at 01:29 AM

@Christiaan Meihsl this is the case when i try to extract 60 instruments. will the time increase if i try to extract 350-400 instruments through REST API in one go. Also i wanted to know what is the maximum number of instruments i can use in on request.

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