Table 1: Comparison of Ray instances with MPI ranks and mini-ranks.

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Table 1: Comparison of Ray instances with MPI ranks and mini-ranks.
Metric
 Ray with MPI ranks
 Ray with mini-ranks
Accession
 SRA010766
 SRA010766
Description
 Jay T. Flatley genome
 Jay T. Flatley genome
Input files
 164
 164
Input sequences
 1593032322
 1593032322
Compression
 Bzip2
 Bzip2
K-mer length
 21
 21
MPI implementation
 Open-MPI 1.6.2
 Open-MPI 1.6.2
Compiler
 GNU g++ 4.7.0
 GNU g++ 4.7.0
Ray version
 2.1.0-pre-release
 2.1.1-devel (9cbf2a8277)
RayPlatform version
 1.1.0-pre-release
 7.0.0-devel (7e38d17e0f)
Interconnect
 Mellanox MT26428
 Mellanox MT26428
Processor
 AMD Opteron 6172
 AMD Opteron 6172
Machines
 43
 100
MPI ranks per machine
 23 or 24
 1
MPI ranks
 1024
 100
Mini-ranks per MPI rank
 None
 23
Mini-ranks
 None
 2300
Messaging strategy
 Virtual routing with polytope
 None
Routing graph
 Polytope
 None
Routing graph degree
 62
 None
Network testing
 00:00:20
 00:00:03
Counting sequences to assemble
 00:13:45
 00:10:34
Sequence loading
 00:45:01
 00:30:09
K-mer counting
 02:55:18
 00:11:44
Coverage distribution analysis
 00:00:22
 00:00:08
Graph construction
 00:22:33
 00:17:04
Null edge purging
 00:20:25
 00:19:49


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