Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: In-Depth Exploration of Single-Snapshot Lossy Compression Techniques for
  N-Body Simulations   In situ lossy compression allowing user-controlled data loss can
significantly reduce the I/O burden. For large-scale N-body simulations where
only one snapshot can be compressed at a time, the lossy compression ratio is
very limited because of the fairly low spatial coherence of the particle data.
In this work, we assess the state-of-the-art single-snapshot lossy compression
techniques of two common N-body simulation models: cosmology and molecular
dynamics. We design a series of novel optimization techniques based on the two
representative real-world N-body simulation codes. For molecular dynamics
simulation, we propose three compression modes (i.e., best speed, best
tradeoff, best compression mode) that can refine the tradeoff between the
compression rate (a.k.a., speed/throughput) and ratio. For cosmology
simulation, we identify that our improved SZ is the best lossy compressor with
respect to both compression ratio and rate. Its compression ratio is higher
than the second-best compressor by 11% with comparable compression rate.
Experiments with up to 1024 cores on the Blues supercomputer at Argonne show
that our proposed lossy compression method can reduce I/O time by 80% compared
with writing data directly to a parallel file system and outperforms the
second-best solution by 60%. Moreover, our proposed lossy compression methods
have the best rate-distortion with reasonable compression errors on the tested
N-body simulation data compared with state-of-the-art compressors.

14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
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The categories of this paper are: solv-int
30
The categories of this paper are: q-alg