From 123d953d204b817f076472705db0217db19904b4 Mon Sep 17 00:00:00 2001 From: Anastasia Alexadrova Date: Thu, 14 Dec 2023 09:50:51 +0100 Subject: [PATCH] Added primary criteria --- docs/installation.md | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/docs/installation.md b/docs/installation.md index 202d5c04..fc553556 100644 --- a/docs/installation.md +++ b/docs/installation.md @@ -7,7 +7,13 @@ Find the list of supported platforms for Percona Backup for MongoDB on the [Perc ## System requirements * At least 1GB RAM is required on every node for `pbm-agents` to operate successfully. -* All `pbm-agents` in the cluster must be able to connect to all config server replica set nodes that could become a new primary. In non-sharded replica set deployments, this means to connect to all the nodes that could become a new primary node. +* All `pbm-agents` in the cluster must be able to connect to all config server replica set nodes that could become a new primary. In non-sharded replica set deployments, this means to connect to all the nodes that could become a new primary node. To become a primary, a node must meet the following criteria: + + * have `priority` greater than `0` and must be able to vote (`votes`: 1) + * is not an arbiter (`arbiterOnly: false`) + * is not hidden (`hidden: false`) + * is not delayed + * All `pbm-agents` in your deployment must be able to connect to the same [remote backup storage](details/storage-configuration.md) using the same credentials. Note that networking issues like connection to the remote backup storage can also affect PBM performance.