How can I realize automatic database backups and cleanups of Polyspace Access from R2020b?

27 views (last 30 days)
Is there any more information on how to do this?

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 7 Sep 2021
Edited: MathWorks Support Team on 7 Sep 2021
This answer was flagged by Martin Becker
Following is an example how to do both backup and cleanup as once-a-week cronjobs: 
1) crontab should look like follows (run 'crontab -e' as root):
0 0 * * 0 /var/lib/polyspace/ > /var/backups/polyspace/cleanup_access.log 2>&1
0 1 * * 0 /var/lib/polyspace/ > /var/backups/polyspace/backup_access.log 2>&1
2) if /var/backups/polyspace does not exist, create this folder using the shell command:
mkdir /var/backups/polyspace
Warning: the folder /var/backups/polyspace should contain enough free disk space to store the copy of the database. Otherwise, you could experience problems during the backup.
To know the size of the database, enter the shell command:
docker exec -i polyspace-access-db-main psql -a -b -U postgres prs_data -t -c "SELECT pg_size_pretty(pg_database_size('prs_data'))"
To know the disk space available for /var/backups/polyspace, enter the shell command:
df -h /var
If there is not enough space on /var, instead of var/backups/polyspace you could choose another folder for the backup file and update the cronjob accordingly.
3) put the following 3 files in /var/lib/polyspace:
set -e
BASEDIR=$(dirname "$0")
echo ""
echo "Cleanup starts..."
echo ""
echo "To clean:"
cat $BASEDIR/cleanup.pscauto
echo ""
echo "Requesting clean in $ACCESS_STORAGE_DIR..."
cp $BASEDIR/cleanup.pscauto $ACCESS_STORAGE_DIR/.
set -e
echo "Pausing services..."
docker stop polyspace-access-etl-main polyspace-access-web-server-main
echo "Backing up database..."
time docker exec polyspace-access-db-main pg_dumpall -U postgres | gzip > /var/backups/polyspace/backup_access.gz
echo "Resuming services..."
docker start polyspace-access-etl-main polyspace-access-web-server-main
# 1. Please change the command to list projects according to your needs (e.g. path to binary, hostname, login, protocol, password)
my $ps_access_command = '"/usr/local/Polyspace_Server/R2020b/polyspace/bin/polyspace-access" -host -protocol http -list-project -login admin -encrypted-password ABABABABABABABABABA';
# 2. Please change the location of the output file
my $pscauto_filename = './cleanup.pscauto';
# 3. 
$value = qx($ps_access_command);
@lines = grep(/ProjectsWaitingForDeletion\/.*/, split('\n', $value));  # use this for recursive delete
#@lines = grep(/ProjectsWaitingForDeletion\/.* RUN_ID \d+$/, split('\n', $value));  # use this to only delete leaf nodes
@lines = map { s/(.+?)( RUN_ID .*)?$/delete_project \"\1\"/g; $_ } @lines; 
open(FH, '>', $pscauto_filename) or die $!;
print FH join("\n", @lines);
print "\n$pscauto_filename successfully written!\n\n";
Things that must be adjusted to the installation:
  1. in path, username, and password (note: encrypted password as in other server commands)
  2. in ACCESS_STORAGE_DIR according to the Polyspace Access installation path
  3. in case any paths are changed, and crontab must be adjusted, too
Please note:
  • There should be several GB of free disk space in /var/backups since the database (even compressed) can be quite large.
  • A backup can take quite a while and the database is unavailable during the operation, therefore this should be done overnight or at the weekends.
Note that this is very simplistic, but it works (tested with R2020b on Debian and Ubuntu). For advanced use, log rotation and rotating backups might be interesting (, as well as NFS/AFS/Samba/... backups instead of putting them locally into /var/backups. Users might also want to distribute these files via puppet/ansible/chef, in case they have multiple Access instances.(For more information about puppet, please see: )
Martin Becker
Martin Becker on 24 May 2022
Note that since R2022a the container names have changed. It is now: polyspace-access-etl-0-main, polyspace-access-web-server-0-main and polyspace-access-db-0-main (the zero is new)

Sign in to comment.

More Answers (0)


No tags entered yet.




Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!