Presentation at DBDM/CCGrid

I’ve just presented the paper “Adapting The Secretary Hiring Problem for Optimal Hot-Cold Tier Placement under Top-K Workloads” at DBDM, CCGrid here in Larnaca, Cyprus.


The paper examines analytic solutions to optimization problems related to tiered/hierarchical storage under Top-K queries with HASTE, and its relation to the classic discrete optimization ‘Secretary Hiring Problem’.


Successful HASTE ‘all hands’ at Uppsala (Nov 7-9)

Johan makes a start on the fika…
Everyone presented their latest work, and discussed the latest image datasets from AstraZeneca and Vironova. During the software workshop session, we discussed linking the HASTE cloud pipeline to the Vironova MiniTEM.

Thanks to: Carolina Wählby, Ola Spjuth, Andreas Hellander, Ida-Maria Sintorn, Alan Sabirsh, Ernst Ahlberg Helgee, Johan Karlsson, Håkan Wieslander, Philip Harrison, Salman Toor, Ben Blamey, Håkan Öhrn, Markus M. Hilscher, Niharika Gauraha, Magnus Larsson, Oliver Stein, Andy Ishak

HASTE project featured in ‘Framtidens Forskning’

HASTE has been featured in ‘Framtidens Forskning’: “As more and more instruments are generating more and more data, we need new methods to not completely drown in data volumes. Our tools make it possible to know in advance where to focus the analysis, which greatly reduces time-consuming and streamlines resource usage” said Prof. Carolina Wählby, Principle Investigator for the HASTE project. Read the full article.

Publication announcement: Apache Spark Streaming and HarmonicIO: A Performance and Architecture Comparison

The HASTE team are pleased to announce the availability of a new publication of the arXiv pre-print service: ‘Apache Spark Streaming and HarmonicIO: A Performance and Architecture Comparison‘. We performed a benchmark analysis to compare two stream processing frameworks – the popular, Apache Spark framework, widely used in industry, and our own framework HarmonicIO (presented this summer at IEEE Cloud 2018 in San Francisco ).

Previous studies have demonstrated that Apache Spark, Flink and related frameworks can perform stream processing at very high frequencies, but they tend to focus on small messages with a computationally light ‘map’ stage for each message; a common enterprise use case (for example, processing JSON documents). In academic HPC contexts, we often want to analyze larger messages, with more CPU-intensive computations. Our study adds to these benchmarks by broadening the domain to include such processing loads – larger messages (leading to network-bound throughput), and that are computationally intensive (leading to CPU-bound throughput) in the map phase; in order to evaluate applicability of these frameworks to scientific computing applications.

We find that relative performance varies considerably across this domain, with the chosen means of stream source integration having a big impact. Most interestingly, we find that Spark performs very well for large (~10Mb) and small message sizes (~1Kb), but for medium-sized messages, it can be out-performed by HarmonicIO in some configurations. These message sizes are relevant to HASTE, because such file sizes are typical of microscopy applications.

We offer recommendations for choosing and configuring the frameworks, and present a benchmarking toolset developed for this study.

Pre-print is available at:

HASTE Meeting in Uppsala & Stockholm

We had a successful project meeting in Uppsala/Stockholm last month – Håkan Wieslander presented his latest research on image feature analysis,  Phil Harrison his latest conformal prediction models, Ben Blamey demonstrated the prototype HASTE pipeline, Niharika Gauraha her work on SVM+. Alan Sabirsh and Johan Karlsson explained a little more about their work at Astrazeneca.

On day 2, we visited Vironova in Stockholm, and were treated to a hands-on demo of their MiniTEM electron microscope – and discussed plans for the next project phase.

Johan preparing a sample.
Demonstrating the MiniTEM
Enjoying Dinner in Uppsala!