Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Model-Parallel Inference for Big Topic Models   In real world industrial applications of topic modeling, the ability to
capture gigantic conceptual space by learning an ultra-high dimensional topical
representation, i.e., the so-called "big model", is becoming the next
desideratum after enthusiasms on "big data", especially for fine-grained
downstream tasks such as online advertising, where good performances are
usually achieved by regression-based predictors built on millions if not
billions of input features. The conventional data-parallel approach for
training gigantic topic models turns out to be rather inefficient in utilizing
the power of parallelism, due to the heavy dependency on a centralized image of
"model". Big model size also poses another challenge on the storage, where
available model size is bounded by the smallest RAM of nodes. To address these
issues, we explore another type of parallelism, namely model-parallelism, which
enables training of disjoint blocks of a big topic model in parallel. By
integrating data-parallelism with model-parallelism, we show that dependencies
between distributed elements can be handled seamlessly, achieving not only
faster convergence but also an ability to tackle significantly bigger model
size. We describe an architecture for model-parallel inference of LDA, and
present a variant of collapsed Gibbs sampling algorithm tailored for it.
Experimental results demonstrate the ability of this system to handle topic
modeling with unprecedented amount of 200 billion model variables only on a
low-end cluster with very limited computational resources and bandwidth.

28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys