Frank McQuillan created MADLIB-1445:
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Summary: DL: Hyperband phase 1 - print run schedule
Key: MADLIB-1445
URL: https://issues.apache.org/jira/browse/MADLIB-1445
Project: Apache MADlib
Issue Type: New Feature
Components: Deep Learning
Reporter: Frank McQuillan
Fix For: v1.18.0
Python code to do some version of this is in
https://github.com/apache/madlib-site/blob/asf-site/community-artifacts/Deep-learning/automl/hyperband-diag-cifar10-v1.ipynb
in `Section 6. Print run schedule` so you can use that as a starting point
**Story***
Helper function to print hyperband schedule.
```
SELECT hyperband_schedule (schedule_table,
R,
eta,
skip_last)
schedule_table
VARCHAR. Name of output table for all hyperband rounds.
R
INTEGER. Maximum number of resources (iterations) that can be allocated to a
single configuration.
* error check >= eta
eta (optional)
INTEGER, default 3. Controls the proportion of configurations discarded in each
round of successive halving.
For example, for eta=3 will keep the best 1/3 the configurations for the next
round.
* error check > 1
skip_last (optional)
INTEGER, default 0. The number of last rounds to skip. For example, for
skip_last=1 will skip the
last round (i.e., last entry in each bracket), which is standard randomized
search and can
be expensive when run for the total R iterations.
* error check >= 0 and < s_max+1
```
Output
The Hyperband schedule output has the following columns:
```
s INTEGER. Bracket number
i INTEGER. Round (depth) in bracket
n_i INTEGER. Number of configurations in this round
r_i INTEGER. Resources (iterations) in this round
```
**Acceptance**
1) For `R=81, eta=3` check that it prints out the same schedule as in the paper
https://arxiv.org/pdf/1603.06560.pdf on page 9.
2) Set `skip_last =1` and check last row (rounds) in each bracket is dropped
3) Set `skip_last =2` and check last rows (rounds) in each bracket is dropped
4) Try multiple other values to see if produces the correct schedule
5) Try out of range values for R and eta and show it gives an error message
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