Ravi Sir's Cards › AWS
Stop jobs overlapping?
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
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What this card says
What it is
Long run meets next start.
Why it matters
Use flock in cron.
How / example
Lock a job.
flock -n /tmp/b.lock /opt/backup.sh