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This approach allows updating applications that until now could not be updated at runtime at all or could be updated but with a possibly indefinite delay between the time an update is initiated and the time the update is effected (during this p ..." We propose a new approach for dynamic software updates.
This approach allows updating applications that until now could not be updated at runtime at all or could be updated but with a possibly indefinite delay between the time an update is initiated and the time the update is effected (during this period no service is provided).
In comparison Up Stare guarantees dynamic updates can ... This paper presents POLUS, a software maintenance tool capable of iteratively evolving running software into newer versions.
POLUS’s primary goal is to increase the dependability of contemporary server software, which is frequently disrupted either by external attacks or by scheduled upgrades.
We discuss lessons learned, including how an operating system can be structured to better support dynamic update.
Some of the work is based on the assumption that small amount of downtime is acceptable, while others try to get the upgrade finished with no downtime at all. Now we have two threads that must share the data structure but they both use different kinds of structure! Unlike existing approaches, we allow arbitrary changes to functions active on the stack and without requiring the programmer to anticipate the future evolution of a program.We argue, using actual examples, that this capability is needed to dynamically update common real applications.We have taken the approach of building dynamic update functionality directly into an existing operating system, K42.
To determine the applicability of our update system, and to investigate the changes that are made to OS code, we analysed K42’s revision history.
Dynamic update allows an operating system to be patched without the need for a reboot or other service interruption ..." Patches to modern operating systems, including bug fixes and security updates, and the reboots and downtime they require, cause tremendous problems for system users and administrators.