Postgres Slony-я вопрос

Question

Пример команды Slonik на 1-ом узле:

slonik <<_EOF_ 
#-- 
# define the namespace the replication system uses in our example it is 
# slony_example 
#-- 
cluster name = $CLUSTERNAME; 

#-- 
# admin conninfo's are used by slonik to connect to the nodes one for each 
# node on each side of the cluster, the syntax is that of PQconnectdb in 
# the C-API 
# -- 
node 1 admin conninfo = 'dbname=$MASTERDBNAME host=$MASTERHOST user=$REPLICATIONUSER'; 
node 2 admin conninfo = 'dbname=$SLAVEDBNAME host=$SLAVEHOST user=$REPLICATIONUSER'; 

#-- 
# init the first node. Its id MUST be 1. This creates the schema 
# _$CLUSTERNAME containing all replication system specific database 
# objects. 

#-- 
init cluster (id=1, comment = 'Master Node'); 

#-- 
# Slony-I organizes tables into sets. The smallest unit a node can 
# subscribe is a set. The following commands create one set containing 
# all 4 pgbench tables. The master or origin of the set is node 1. 
#-- 
create set (id=1, origin=1, comment='All pgbench tables'); 
set add table (set id=1, origin=1, id=1, fully qualified name = 'public.accounts', comment='accounts table'); 
set add table (set id=1, origin=1, id=2, fully qualified name = 'public.branches', comment='branches table'); 
set add table (set id=1, origin=1, id=3, fully qualified name = 'public.tellers', comment='tellers table'); 
set add table (set id=1, origin=1, id=4, fully qualified name = 'public.history', comment='history table'); 

#-- 
# Create the second node (the slave) tell the 2 nodes how to connect to 
# each other and how they should listen for events. 
#-- 

store node (id=2, comment = 'Slave node', event node=1); 
store path (server = 1, client = 2, conninfo='dbname=$MASTERDBNAME host=$MASTERHOST user=$REPLICATIONUSER'); 
store path (server = 2, client = 1, conninfo='dbname=$SLAVEDBNAME host=$SLAVEHOST user=$REPLICATIONUSER'); 
_EOF_ 

Sample Slonik команды на 2-м узле:

slonik <<_EOF_ 
# ---- 
# This defines which namespace the replication system uses 
# ---- 
cluster name = $CLUSTERNAME; 

# ---- 
# Admin conninfo's are used by the slonik program to connect 
# to the node databases. So these are the PQconnectdb arguments 
# that connect from the administrators workstation (where 
# slonik is executed). 
# ---- 
node 1 admin conninfo = 'dbname=$MASTERDBNAME host=$MASTERHOST user=$REPLICATIONUSER'; 
node 2 admin conninfo = 'dbname=$SLAVEDBNAME host=$SLAVEHOST user=$REPLICATIONUSER'; 

# ---- 
# Node 2 subscribes set 1 
# ---- 
subscribe set (id = 1, provider = 1, receiver = 2, forward = no); 
_EOF_ 

Какая из Slonik команд выше (при чем Slonik команда) , создает схему $ CLUSTERNAME в каждой базе данных?

Меня больше интересует второй узел; это команда store node(), которая создает схему $ CLUSTERNAME в базе данных второго узла?

Answer 1

«кластер init» на первом узле, «узел хранения» на втором.