From dff2c02af97fc3f08c9b69037195a7b1665d8c59 Mon Sep 17 00:00:00 2001
From: Tiago Loureiro <tiago.loureiro@gmail.com>
Date: Thu, 9 Apr 2020 15:11:45 +0200
Subject: [PATCH 1/2] More repair slots

---
 defaults/main.yml | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/defaults/main.yml b/defaults/main.yml
index e5f068e..1feb596 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -86,6 +86,14 @@ cassandra_backup_hour: 16
 # If there are more instances than repair slots, the slots are repeated,
 # i.e. a slot is assigned to more than one instance.
 cassandra_repair_slots:
+  - { weekday: '0', hour: '23' }
+  - { weekday: '1', hour: '23' }
+  - { weekday: '2', hour: '23' }
+  - { weekday: '3', hour: '23' }
+  - { weekday: '4', hour: '23' }
+  - { weekday: '5', hour: '23' }
+  - { weekday: '6', hour: '23' }
+
   - { weekday: '0', hour: '0' }
   - { weekday: '1', hour: '0' }
   - { weekday: '2', hour: '0' }
@@ -94,6 +102,14 @@ cassandra_repair_slots:
   - { weekday: '5', hour: '0' }
   - { weekday: '6', hour: '0' }
 
+  - { weekday: '0', hour: '1' }
+  - { weekday: '1', hour: '1' }
+  - { weekday: '2', hour: '1' }
+  - { weekday: '3', hour: '1' }
+  - { weekday: '4', hour: '1' }
+  - { weekday: '5', hour: '1' }
+  - { weekday: '6', hour: '1' }
+
   - { weekday: '0', hour: '2' }
   - { weekday: '1', hour: '2' }
   - { weekday: '2', hour: '2' }
@@ -102,6 +118,14 @@ cassandra_repair_slots:
   - { weekday: '5', hour: '2' }
   - { weekday: '6', hour: '2' }
 
+  - { weekday: '0', hour: '3' }
+  - { weekday: '1', hour: '3' }
+  - { weekday: '2', hour: '3' }
+  - { weekday: '3', hour: '3' }
+  - { weekday: '4', hour: '3' }
+  - { weekday: '5', hour: '3' }
+  - { weekday: '6', hour: '3' }
+
   - { weekday: '0', hour: '4' }
   - { weekday: '1', hour: '4' }
   - { weekday: '2', hour: '4' }
@@ -110,6 +134,14 @@ cassandra_repair_slots:
   - { weekday: '5', hour: '4' }
   - { weekday: '6', hour: '4' }
 
+  - { weekday: '0', hour: '5' }
+  - { weekday: '1', hour: '5' }
+  - { weekday: '2', hour: '5' }
+  - { weekday: '3', hour: '5' }
+  - { weekday: '4', hour: '5' }
+  - { weekday: '5', hour: '5' }
+  - { weekday: '6', hour: '5' }
+
   - { weekday: '0', hour: '6' }
   - { weekday: '1', hour: '6' }
   - { weekday: '2', hour: '6' }
@@ -117,3 +149,11 @@ cassandra_repair_slots:
   - { weekday: '4', hour: '6' }
   - { weekday: '5', hour: '6' }
   - { weekday: '6', hour: '6' }
+
+  - { weekday: '0', hour: '7' }
+  - { weekday: '1', hour: '7' }
+  - { weekday: '2', hour: '7' }
+  - { weekday: '3', hour: '7' }
+  - { weekday: '4', hour: '7' }
+  - { weekday: '5', hour: '7' }
+  - { weekday: '6', hour: '7' }

From 94aa0df68e889dca628103306331c291b67b7f51 Mon Sep 17 00:00:00 2001
From: Tiago Loureiro <tiago.loureiro@gmail.com>
Date: Thu, 9 Apr 2020 15:14:31 +0200
Subject: [PATCH 2/2] Comment

---
 defaults/main.yml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/defaults/main.yml b/defaults/main.yml
index 1feb596..cdb9024 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -85,6 +85,14 @@ cassandra_backup_hour: 16
 # instances that are newer than the removed instance.
 # If there are more instances than repair slots, the slots are repeated,
 # i.e. a slot is assigned to more than one instance.
+#
+# The current allocation strategy is good assuming that:
+#  - You have max. 63 nodes
+#  - Your repairs take less than 1h
+#
+# If the above assumptions do not hold, review this strategy
+# and space them out so that 2 repairs do not run at the same time 
+#
 cassandra_repair_slots:
   - { weekday: '0', hour: '23' }
   - { weekday: '1', hour: '23' }