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# Federated SystemDS tutorial
This tutorial is dedicated to a distributed example of systemds federated.
## Step 1: Setup Parameters
Before you begin look trough the parameters.sh file, and change the variables to fit your needs.
The default parameters are set to execute a four worker setup on localhost.
If you have access to other machines simply change the address list to the remote locations, either using IP addresses, or aliases.
Also note the memory settings, and set these appropriately such that you do not run out of memory for local execution of 5 parallel java processes.
Before going further it is expected that you have setup the default install of SystemDS described in: <http://apache.github.io/systemds/site/install>
## Step 2: Install
This install script setup a local python environment installing systemds and
for all the addresses listed in the address list download and build systemds for both java execution but also for python systemds.
```sh
./install.sh
```
at the time of writing it results in:
```txt
Me:~/github/federatedTutorial$ ./install.sh
Creating Python Virtual Enviroment on XPS-15-7590
Successfully installed certifi-2020.12.5 chardet-4.0.0 idna-2.10 numpy-1.20.3 pandas-1.2.4 py4j-0.10.9.2 python-dateutil-2.8.1 pytz-2021.1 requests-2.25.1 six-1.16.0 systemds-2.1.0 urllib3-1.26.4
Installed Python Systemds
```
Also required is to install NodeJS <https://nodejs.org/en/>, simply download and add the bin folder to path add it on path to enable:
```sh
node --version
```
```txt
Me:~/.../scripts/tutorials/federated$ node --version
v16.17.1
```
## Step 3: Setup and Download Data
Next we download and split the dataset into partitions that the different federated workers can use.
```sh
./setup.sh
```
The expected output is:
```txt
Me:~/.../scripts/tutorials/federated$ ./setup.sh
Generating data/mnist_features_4_1.data
Generating data/mnist_labels_4_1.data
Generating data/mnist_labels_hot_4_1.data
Generating data/mnist_test_features_4_1.data
Generating data/mnist_test_labels_4_1.data
Generating data/mnist_test_labels_hot_4_1.data
SystemDS Statistics:
Total execution time: 0.892 sec.
SystemDS Statistics:
Total execution time: 0.943 sec.
SystemDS Statistics:
Total execution time: 0.732 sec.
SystemDS Statistics:
Total execution time: 0.992 sec.
SystemDS Statistics:
Total execution time: 1.227 sec.
SystemDS Statistics:
Total execution time: 1.274 sec.
```
and the data folder should contain the following:
```txt
Me:~/.../scripts/tutorials/federated$ ls data
fed_mnist_features_4.json mnist_features_4_1.data mnist_labels_4_2.data mnist_labels_hot_4_3.data mnist_test_features_4_4.data mnist_test_labels.data
fed_mnist_features_4.json.mtd mnist_features_4_1.data.mtd mnist_labels_4_2.data.mtd mnist_labels_hot_4_3.data.mtd mnist_test_features_4_4.data.mtd mnist_test_labels.data.mtd
fed_mnist_labels_4.json mnist_features_4_2.data mnist_labels_4_3.data mnist_labels_hot_4_4.data mnist_test_features.data mnist_test_labels_hot_4_1.data
fed_mnist_labels_4.json.mtd mnist_features_4_2.data.mtd mnist_labels_4_3.data.mtd mnist_labels_hot_4_4.data.mtd mnist_test_features.data.mtd mnist_test_labels_hot_4_1.data.mtd
fed_mnist_labels_hot_4.json mnist_features_4_3.data mnist_labels_4_4.data mnist_labels_hot.data mnist_test_labels_4_1.data mnist_test_labels_hot_4_2.data
fed_mnist_labels_hot_4.json.mtd mnist_features_4_3.data.mtd mnist_labels_4_4.data.mtd mnist_labels_hot.data.mtd mnist_test_labels_4_1.data.mtd mnist_test_labels_hot_4_2.data.mtd
fed_mnist_test_features_4.json mnist_features_4_4.data mnist_labels.data mnist_test_features_4_1.data mnist_test_labels_4_2.data mnist_test_labels_hot_4_3.data
fed_mnist_test_features_4.json.mtd mnist_features_4_4.data.mtd mnist_labels.data.mtd mnist_test_features_4_1.data.mtd mnist_test_labels_4_2.data.mtd mnist_test_labels_hot_4_3.data.mtd
fed_mnist_test_labels_4.json mnist_features.data mnist_labels_hot_4_1.data mnist_test_features_4_2.data mnist_test_labels_4_3.data mnist_test_labels_hot_4_4.data
fed_mnist_test_labels_4.json.mtd mnist_features.data.mtd mnist_labels_hot_4_1.data.mtd mnist_test_features_4_2.data.mtd mnist_test_labels_4_3.data.mtd mnist_test_labels_hot_4_4.data.mtd
fed_mnist_test_labels_hot_4.json mnist_labels_4_1.data mnist_labels_hot_4_2.data mnist_test_features_4_3.data mnist_test_labels_4_4.data mnist_test_labels_hot.data
fed_mnist_test_labels_hot_4.json.mtd mnist_labels_4_1.data.mtd mnist_labels_hot_4_2.data.mtd mnist_test_features_4_3.data.mtd mnist_test_labels_4_4.data.mtd mnist_test_labels_hot.data.mtd
```
## Step 4: Start Workers
Now everything is setup, simply start the workers using the startAllWorkers script.
```sh
./startAllWorkers.sh
```
output:
```txt
Me:~/.../scripts/tutorials/federated$ ./startAllWorkers.sh
Starting Workers.
Starting monitoring
/home/baunsgaard/github/systemds
Starting worker XPS-15-7590 8003 def
Starting UI
Starting worker XPS-15-7590 8002 def
Starting worker XPS-15-7590 8001 def
Starting worker XPS-15-7590 8004 def
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 130 100 79 100 51 87 56 --:--:-- --:--:-- --:--:-- 144
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 130 100 79 100 51 7380 4764 --:--:-- --:--:-- --:--:-- 13000
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 130 100 79 100 51 8005 5168 --:--:-- --:--:-- --:--:-- 14444
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 130 100 79 100 51 6462 4171 --:--:-- --:--:-- --:--:-- 10833
A Monitoring tool is started at http://localhost:4200
```
The workers will start and some temporary files will be created containing the PID for the worker, to enable specific termination of the worker after experimentation is done.
Note that you can run the algorithm multiple times with the same workers.
```txt
Me:~/.../scripts/tutorials/federated$ ls tmp/worker
XPS-15-7590-8001 XPS-15-7590-8002 XPS-15-7590-8003 XPS-15-7590-8004
Me:~/.../scripts/tutorials/federated$ cat tmp/worker/XPS-15-7590-8001
32528
```
Also worth noting is that all the output from the federated worker is concatenated to: results/fed/workerlog/
At startup a federated monitoring tool is launched at <http://localhost:4200>.
## Step 5: Port Forward
if you don't have access to the ports on the federated workers (note local execution can skip this.)
If the ports are not accessible directly from your machine because of a firewall, i suggest using the port forwarding script.
that port forward the list of ports from your local machine to the remote machines.
Note this only works if all the federated machines are remote machines, aka the address list contain no localhost.
```sh
./portforward.sh
```
Note these process will just continue running in the background so have to be manually terminated.
## Step 6: run algorithms
This tutorial is using different scripts depending on what is out commented in the run.sh.
Please go into this file and enable which specific script you want to run.
To execute it simply use:
```sh
./run.sh
```
This have execute three different execution versions.
first with one federated worker, then two and finally a local baseline.
all outputs are put into the results folder and could look like:
```txt
Me:~/github/federatedTutorial$ cat results/fed1/lm_mnist_XPS-15-7590_def.log
SystemDS Statistics:
Total elapsed time: 1.489 sec.
Total compilation time: 0.533 sec.
Total execution time: 0.956 sec.
Cache hits (Mem/Li/WB/FS/HDFS): 6/0/0/0/0.
Cache writes (Li/WB/FS/HDFS): 0/2/0/1.
Cache times (ACQr/m, RLS, EXP): 0.000/0.000/0.001/0.036 sec.
HOP DAGs recompiled (PRED, SB): 0/0.
HOP DAGs recompile time: 0.000 sec.
Federated I/O (Read, Put, Get): 2/0/2.
Federated Execute (Inst, UDF): 6/0.
Total JIT compile time: 1.406 sec.
Total JVM GC count: 2.
Total JVM GC time: 0.023 sec.
Heavy hitter instructions:
# Instruction Time(s) Count
1 fed_tsmm 0.637 1
2 solve 0.231 1
3 write 0.036 1
4 + 0.019 1
5 fed_r' 0.017 1
6 fed_ba+* 0.010 1
7 <= 0.007 1
8 rdiag 0.003 1
9 rand 0.001 1
10 rmvar 0.001 6
11 createvar 0.000 10
12 mvvar 0.000 26
13 - 0.000 12
14 r' 0.000 1
15 == 0.000 8
16 ^ 0.000 1
17 > 0.000 2
18 || 0.000 2
real 4,44
user 6,77
sys 0,28
```
Similarly one can see what the federated sites executed in the federated output logs results/fed/workerlog:
```txt
Me:~/github/federatedTutorial$ cat results/fed/workerlog/XPS-15-7590-8002.out
Federated Worker SystemDS Statistics:
Total elapsed time: 0.000 sec.
Total compilation time: 0.000 sec.
Total execution time: 0.000 sec.
Number of compiled Spark inst: 0.
Number of executed Spark inst: 0.
Cache hits (Mem/Li/WB/FS/HDFS): 4/0/0/0/2.
Cache writes (Li/WB/FS/HDFS): 0/0/0/0.
Cache times (ACQr/m, RLS, EXP): 0.287/0.000/0.000/0.000 sec.
HOP DAGs recompiled (PRED, SB): 0/0.
HOP DAGs recompile time: 0.000 sec.
Spark ctx create time (lazy): 0.000 sec.
Spark trans counts (par,bc,col):0/0/0.
Spark trans times (par,bc,col): 0.000/0.000/0.000 secs.
Total JIT compile time: 1.943 sec.
Total JVM GC count: 2.
Total JVM GC time: 0.023 sec.
Heavy hitter instructions:
# Instruction Time(s) Count
1 tsmm 0.387 1
2 r' 0.022 1
3 ba+* 0.004 1
4 rmvar 0.000 3
```
## Step 6: Stop Workers
To stop the workers running simply use the stop all workers script.
```sh
./stopAllWorkers.sh
```
```txt
Me:~/.../scripts/tutorials/federated$ ./stopAllWorkers.sh
Stopping workers XPS-15-7590
Stopping Monitoring
STOP NPM manually!! Process ID:
62870
```
As specified by the output npm is still running and have to be manually stopped.
Simply search for 'ng serve' process in the terminal and stop it.