Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

default policy: Rack awareness without token awareness #777

Merged
merged 3 commits into from Aug 3, 2023
Merged

default policy: Rack awareness without token awareness #777

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
81f3afb
default,locator: predicate takes ref to NodeRef
wprzytula Jul 30, 2023
d86d311
default_policy: Prefer local rack nodes
wprzytula Jul 30, 2023
0fca0db
default: ReplicaLocation[Preference|Criteria] -> Node...
wprzytula Aug 2, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
5 changes: 3 additions & 2 deletions docs/source/load-balancing/default-policy.md
View file
Open in desktop
Expand Up @@ -44,15 +44,16 @@ policy to prioritize nodes based on their location. It has three modes:

When a datacenter `"my_dc"` is preferred, the policy will treat nodes in `"my_dc"`
as "local" nodes, and nodes in other datacenters as "remote" nodes. This affects
the order in which nodes are returned by the policy when selecting replicas for
the order in which nodes are returned by the policy when selecting nodes for
read or write operations. If no datacenter is preferred, the policy will treat
all nodes as local nodes.

`preferences` allow the load balancing policy to prioritize nodes based on their
availability zones (racks) in the preferred datacenter, too. When a datacenter
and a rack are preferred, the policy will first return replicas in the local rack
in the preferred datacenter, and then the other replicas in the datacenter
(followed by remote replicas).
(followed by remote replicas). After replicas, the other node will be ordered
similarly, too (local rack nodes, local datacenter nodes, remote nodes).

When datacenter failover is disabled (`permit_dc_failover` is set to
false), the default policy will only include local nodes in load balancing
Expand Down