--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/host/doc/backup.txt	Tue Dec 14 07:41:01 2021 +0000
@@ -0,0 +1,17 @@
+s1.luan.software - master db
+test.luan.software - slave db
+
+install:
+
+brew tap caskroom/versions
+brew install postgresql@9.5
+
+./addStartupScriptsPostgres.sh
+
+create replica
+
+1) mkdir /Users/administrator/replica/s1 (must be empty)
+
+2) pg_basebackup -h s1.luan.software -D /Users/administrator/replica/s1 -R -P -U administrator --xlog-method=stream
+
+replace configs with files *.slave from startup/postgres