From f44bcc33068ba71968f8a49cbf1da69ec20c2ec1 Mon Sep 17 00:00:00 2001
From: ale <ale@incal.net>
Date: Sat, 8 Oct 2011 20:43:09 +0000
Subject: [PATCH] support split master/slave backends for the primary database
---
db-config.php | 9 ++++++++-
r2db/db-backends.php | 16 +++++++++++++++-
2 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/db-config.php b/db-config.php
index 88f67a322..b82eaaa8f 100644
--- a/db-config.php
+++ b/db-config.php
@@ -5,19 +5,26 @@ $wpdb->persistent = true;
$wpdb->max_connections = 30;
define("NOBLOGS_BACKEND_CONFIG", "/etc/noblogs/backends");
+define("NOBLOGS_MASTER_CONFIG", "/etc/noblogs/master");
include_once('r2db/db-hash.php');
include_once('r2db/db-backends.php');
// Add the global database (configured in wp-config.php), stores the global
// blogs and users tables.
+
+// This is the read-only slave.
$wpdb->add_database(array(
"host" => DB_HOST,
"user" => DB_USER,
"password" => DB_PASSWORD,
"name" => DB_NAME,
"dataset" => "global",
- "write" => 1, "read" => 1, "timeout" => 2
+ "write" => 0, "read" => 1, "timeout" => 2
));
+// This is the write-only master.
+$wpdb->add_database(noblogs_load_master(NOBLOGS_MASTER_CONFIG));
+
+// Add all the sharded blog databases.
$wpdb_reverse_backend_map = noblogs_load_backends(NOBLOGS_BACKEND_CONFIG, $wpdb->hash_map);
diff --git a/r2db/db-backends.php b/r2db/db-backends.php
index 3988f164c..7cd26af0f 100644
--- a/r2db/db-backends.php
+++ b/r2db/db-backends.php
@@ -25,7 +25,7 @@ function noblogs_load_backends($db_config_file, $hashptr) {
"password" => $backend_url_data["pass"],
"name" => substr($backend_url_data["path"], 1),
"dataset" => $dataset,
- "read" => 1, "write" => 1, "timeout" => 2
+ "read" => 1, "write" => 1, "timeout" => 10
);
$wpdb->add_database($backend);
$hashptr->addTarget($dataset);
@@ -34,3 +34,17 @@ function noblogs_load_backends($db_config_file, $hashptr) {
fclose($fp);
return $backend_map;
}
+
+function noblogs_load_master($master_file) {
+ $master_url = trim(file_get_contents($master_file));
+ $mdata = parse_url($master_url);
+ return array(
+ "host" => $mdata["host"] . ":" . $mdata["port"],
+ "user" => $mdata["user"],
+ "password" => $mdata["pass"],
+ "name" => substr($mdata["path"], 1),
+ "dataset" => "global",
+ "read" => 0, "write" => 1, "timeout" => 10
+ );
+}
+
--
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