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Released SDP Memos

SDP Memo Disclaimer: The SDP memos are designed to allow the quick recording of investigations and research done by members of the SDP. They are also designed to raise questions about parts of the SDP design or SDP process. The contents of a memo may be the opinion of the author, not the whole of the SDP.

1. SDP Memo 001: SKA SDP Memo 001 PAF De-rotation options trade-off: initial SDP response  (Lead Author: Rosie Bolton):

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PDF icon ska-tel_sdp-sdpc-memo-001-a.pdf320.06 KB

2. SDP Memo 002:  SKA SDP Memo 002 Time and channel averaging (Lead Author: Chris Skipper):

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PDF icon ska-tel-sdp-sdpc-memo-002.pdf1.99 MB

3. SDP Memo 003: SDP Memo: Fast Fourier Transforms (Lead Author: Stef Salvini):

4. SDP Memo 004: SDP Memo: Feasibility analysis of baseline-dependent averaging (Lead Author: Stefan Wijinholds):

5. SDP Memo 005: SDP MEMO: DATA CHALLENGE SUPPLEMENT (Lead Author: Markus Dolensky):

6. SDP Memo 006: SDP Memo: Receive and Pre-process Visibility Data (Lead Author: Ger van Diepen):

7. SDP Memo 007: SDP Memo: The SDP Calibration Component (Lead Author: Stef Salvini):

8. SDP Memo 008: SDP Memo: The SDP Imaging Pipeline (Lead Author: Anna Scaife):

9. SDP Memo 009: SDP Memo: Science Data Analysis (Lead Author: Melanie Johnston-Hollitt):

10. SDP Memo 010: SDP Memo: Estimating the SDP Computational Efficiency (Lead Author: Bojan Nikolić):

11. SDP Memo 011

12. SDP Memo 012: SDP Memo: iPython Performance Model Handbook (Lead Author: Francois Malan):

13. SDP Memo 013: SDP Memo: Regional Centres (Lead Author: Rob Simmonds):

14. SDP Memo 014: SDP Memo: PROT.ISP: File-system Benchmark Report (Lead Author: Willi Homberg):

15. SDP Memo 015: SDP Memo: Can SDP use existing big- data systems?​ (Lead Author: Rob Simmonds):

16. SDP Memo 016: SDP Memo: SDP Non-Imaging Processing Compute Requirements (Lead Author: Ben Stappers):

17. SDP Memo 017: SDP Memo 017: Dataflow Choice (Lead Author: Markus Dolensky):

18. SDP Memo 018: SDP Memo: SDP Data Driven Architecture I: Justification​ (Lead Author: Bojan Nikolić):

19. SDP Memo 019: SDP Memo: SDP Load List (Lead Author: Ferdl Graser): 

20. SDP Memo 020: SDP Memo: Data-driven Architecture Prototyping Report (Lead Author: Markus Dolensky): 

21. SDP Memo 021: SDP Memo: Dataflow prototyping report (Lead Author: Peter Braam):

22. SDP Memo 022: SDP Memo: MeerKAT Report (Lead Author: Simon Ratcliffe):

23. SDP Memo 023: Horizontal Prototyping Interim Report (Lead Author: David Terrett):

24. SDP Memo 024: SDP Memo: Organisation of the SDP 2016 PDR Architecture Documentation (Lead Author: Peter Braam):

25. SDP Memo 025: SDP Memo 025: Updated SDP Cost Basis of Estimate June 2016 (Lead Author: Ferdl Graser):

26. SDP Memo 026: SDP Memo: 027 The Infeasibility of High Quality Ionospheric Calibration of SKA1-LOW (Lead Author: Tim Cornwell):

27. SDP Memo 027: SDP Memo: 027 The Infeasibility of High Quality Ionospheric Calibration of SKA1-LOW: response to comments (Lead Author: Tim Cornwell):

28. SDP Memo 028: SDP Memo 028: Gridding Computational Intensity (Lead Author: Peter Wortmann):

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PDF icon sdp-gridding-computational.pdf1.45 MB

29. SDP Memo 029: SDP Memo 29: Integration Prototype Build and Deployment Infrastructure Design (Lead Author: Iain Emsley):

30. SDP Memo 030

31. SDP Memo 031: Quantifying Power Efficiency of FFTs on NVidia GPUs (Lead Author: James Kent):

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PDF icon powerefficiencysdp.pdf332.17 KB

32. SDP Memo 032: On the Precision Required in SDP Pipelines (Lead Author: Stef Salvini):

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PDF icon precision.pdf285.59 KB

33. SDP Memo 033: SDP Memo 033: Sky Model Considerations (Lead Author: Ian Heywood):

34. SDP Memo 034: Practical Distributed Data Processing using SWIFT/T & CASA (Lead Author: Bojan Nikolić):

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PDF icon 2017-08-casaswift.pdf170.26 KB

35. SDP Memo 035: SDP Memo FP32 vs. FP64 (Lead Author: John Taylor):

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PDF icon sdp_memo_fp32_vs._fp64.pdf148.67 KB

36. SDP Memo 036: SDP Memo 36: Convolution Gridding on CPU, GPU and KNL (Lead Author: Jacques du Toit):

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PDF icon sdp_memo_36.pdf4.91 MB

37. SDP Memo 037: SDP Memo 037: IO and Storage Software (Lead Author: Peter Braam):

38. SDP Memo 038: SDP Memo 038: Pipeline Working Sets and Communication (Lead Author: Peter Wortmann):

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PDF icon pipeline-working-sets.pdf416.84 KB

39. SDP Memo 039: SDP Memo 039: Full-Scale DALiuGE Data Simulation and Reduction on Tianhe-2 (Lead Author: Baoqiang Lao):

40. SDP Memo 040: SDP Memo 40: PSRFITS Overview for NIP (Lead Author: Robert Lyon):

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PDF icon psrfits_sdp_memo.pdf334.08 KB

41. SDP Memo 041: SDP Memo 041: Calibration and imaging context (Lead Author: Tim Cornwell):

42. SDP Memo 042: SDP Memo 42: Data Model Summary for Pulsar/Transient Search & Timing (Lead Author: Robert Lyon):

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PDF icon datamodelssummary_memo_lyon_et_al.pdf374.91 KB

43. SDP Memo 043: SDP Memo 43: Pulsar Timing Failure Analysis (Lead Author: Robert Lyon):

44. SDP Memo 044

45. SDP Memo 045: SDP Memo 045: Overview of Buffer Prototyping and Modeling (Lead Author: John Taylor):

46. SDP Memo 046: SDP Memo 046: Experiences with the SPEAD protocol (Lead Author: Rodrigo Tobar):

47. SDP Memo 047: SDP Memo 047: Scheduling Schemes and Buffer Considerations​ (Lead Author: Yongxin Zhu):

Recent news

SIP ARL

Since the last eNews submission the SDP has successfully submitted and certified its last milestone, M19, and now is busy preparing for the next milestone, M20, Pre-CDR. The M20 Release Readiness Notice (RRN) was submitted in early March and contains 19 documents within the submission pack. This list includes Systems Engineering documents, Interface documentation (ICDs) and an updated snapshot of the latest SDP Architecture views since the M19 submission.

This pre-CDR milestone is a stepping stone to a successful CDR delivery in October.  An incremental submission allows valuable key stakeholder feedback to be gained in particular on the architectural design to ensure continuous improvement and alignment of architectural priorities.

In addition to the finalisation of deliverables for Pre-CDR submission, other areas of focus for the Consortium are - further iterations of the SDP software architecture, advances in the SEI views of the high-level SDP architecture, continued understanding of the SDP interfaces, progress on the SDP functional model using the Algorithmic Reference Library (ARL), progress on the SDP prototyping testbed (P3) in Cambridge, progress on the SDP Integration Prototype (SIP) including end-to-end testing, consolidation of data models work, monitoring of the hardware costs evolution and updates to the corresponding predicted cost to name a few!

The sections below expand in further detail the recent work efforts and progress in the areas of platform and systems integration prototyping (P3, SIP) as well as the ARL. This work reduces risk and provides the rationale for design choices ahead of System CDR.

SDP Architecture doc

The next significant milestone for the SDP Consortium is M19 on the 30th November. M19 is a lightweight review of the current state of the SDP software architecture and forms a checkpoint with the SKAO to present the current state of the architecture and progress towards Critical Design Review (CDR).

All relevant SDP SEI style views and other supporting documentation for functionally close blocks of architecture will be reviewed. The goal is to present the information in sufficient detail to facilitate immediate use by a knowledgeable audience member.

In preparation for this review, a Stakeholders Overview will take place. The required participants will include key members of the SDP architectural design team and knowledgeable stakeholders from SKAO. This review is to ensure that the high-level architecture documentation, for the purposes of providing an introductory, high-level explanation of the design, is sufficiently complete. In preparation for this overview, key members of the SDP Architecture design team recently selected a collection of views for review and this information has been distributed to the SKAO.

Comments and or suggestions made during the Stakeholder Overview and the official M19 review will guide further architectural priorities ahead of M20 (Element pre-CDR).