https://bugzilla.wikimedia.org/show_bug.cgi?id=57613
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Bug ID: 57613
Summary: Distributed cron replacement
Product: Wikimedia Labs
Version: unspecified
Hardware: All
OS: Linux
Status: NEW
Keywords: need-volunteer, tracking
Severity: enhancement
Priority: Unprioritized
Component: General
Assignee: wikibugs-l@lists.wikimedia.org
Reporter: m...@uberbox.org
CC: abog...@wikimedia.org, benap...@gmail.com,
q...@wikimedia.org, rlan...@gmail.com
Classification: Unclassified
Mobile Platform: ---
A common requirement in infrastructure maintenance is the ability to execute
tasks at scheduled times and intervals. On Unix systems (and, by extension,
Linux) this is traditionally handled by a cron daemon. Traditional crons,
however, run on a single server and are therefore unscalable and create single
points of failure. While there are a few open source alternatives to cron that
provide for distributed scheduling, they either depend on a specific "cloud"
management system or on other complex external dependencies; or are not
generally compatible with cron.
The Wikimedia Labs has a need for a scheduler that:
* Is configurable by traditional crontabs;
* Can run on more than one server, distributing execution between them; and
* Guarantees that scheduled events execute as long as at least one server is
operational.
The ideal distributed cron replacement would have as few external dependencies
as possible and be general enough that it can be usable by other
infrastructures (that is, does not rely on any specificity of the Wikimedia
Labs).
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