From: Tom Clegg Date: Thu, 2 Nov 2023 21:10:59 +0000 (-0400) Subject: 20978: Add upgrade note about MaximumPriceFactor. X-Git-Url: https://git.arvados.org/arvados.git/commitdiff_plain/0e9f41a15027a66c69ef351846b213b2e2075642 20978: Add upgrade note about MaximumPriceFactor. Arvados-DCO-1.1-Signed-off-by: Tom Clegg --- diff --git a/doc/admin/upgrading.html.textile.liquid b/doc/admin/upgrading.html.textile.liquid index 32b3bf701c..e8441dd5f0 100644 --- a/doc/admin/upgrading.html.textile.liquid +++ b/doc/admin/upgrading.html.textile.liquid @@ -32,6 +32,12 @@ h2(#main). development main "previous: Upgrading to 2.7.0":#v2_7_0 +h3. Check implications of Containers.MaximumPriceFactor 1.5 + +When scheduling a container, Arvados now considers using instance types other than the lowest-cost type consistent with the container's resource constraints. If a larger instance is already running and idle, or the cloud provider reports that the optimal instance type is not currently available, Arvados will select a larger instance type, provided the cost does not exceed 1.5x the optimal instance type cost. + +This will typically reduce overall latency for containers and reduce instance booting/shutdown overhead, but may increase costs depending on workload and instance availability. To avoid this behavior, configure @Containers.MaximumPriceFactor: 1.0@. + h3. Synchronize keepstore and keep-balance upgrades The internal communication between keepstore and keep-balance about read-only volumes has changed. After keep-balance is upgraded, old versions of keepstore will be treated as read-only. We recommend upgrading and restarting all keepstore services first, then upgrading and restarting keep-balance.