Emc IP Holding Company LLC

Gene W Lee

Douglas Kilpatrick

Jared O'Dell

Mark Ranger

Sophia Anderson

Accelerated behavior change for upgrades in a distributed system is described herein. A method as described herein can include facilitating a file system upgrade of a first computing node of a computing cluster from a first file system version to a second file system version that is newer than the first file system version, wherein the file system upgrade comprises pre-restart operations and a system restart performed subsequent to the pre-restart operations; activating a supervisor system of the first computing node in response to the first computing node completing the file system upgrade; and causing, in response to the activating, the supervisor system of the first computing node to initiate concurrent performance of the pre-restart operations of the file system upgrade at second computing nodes of the computing cluster, distinct from the first computing node.

Accelerated behavior change for upgrades in distributed systems

Delayed node upgrade in distributed systems is described herein. A method as described herein can include halting first client disconnections associated with a reboot operation of a file system update at a first computing node of a computing cluster in response to the first computing node being added to a delay list; causing, in further response to the first computing node being added to the delay list, second client disconnections associated with the reboot operation of the file system update at a second computing node of a group of second computing nodes of the computing cluster that are distinct from the first computing node; clearing, in response to the file system update being completed at respective ones of the group of second computing nodes, the delay list; and restarting, in response to clearing the delay list, the first client disconnections at the first computing node.

Delayed node upgrade in distributed systems

Techniques are provided for installing patches during upgrades. In an example, an administrator specifies an upgrade image and a patch for a computing cluster. The computing cluster verifies compatibility between the upgrade image and the patch, registers the patch, and stores the patch for later use at the cluster level. Then, at the node level, the upgrade image and the patch are applied to each node that is upgraded.

Installing patches during upgrades

Techniques are provided for installing patches using a jail. In an example, a computing node boots from a first partition and then mounts a second partition. The computing node can install an upgrade image for an operating system on the second partition. The computing node can then create a jail that sets the mount point of the second partition as the apparent root directory, and install one or more patches within the jail. The computing node can then reboot from the patched and upgraded operating system of the second partition. In this manner, the node can be upgraded with an operating system and one or more patches, while being rebooted once.

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Seattle, WA, United States of America

Gene W Lee