And not for long! The Call for Papers for Percona Live MySQL Conference and Expo, to be held at Santa Clara in April 2015, is open. The dead line for submissions is Nov. 16th; that's just around the corner. As with previous years, we will hold a 4 day conference, the first being a tutorials […]
Orchestrator 1.2.1-beta supports Pseudo GTID (read announcement): a means to refactor the replication topology and connect slaves even without direct relationship; even across failed servers. This post illustrates two such scenarios and shows the visual way of mathcing/re-synching slaves. Of course, orchestrator is not just a GUI tool; anything done with drag-and-drop is also done […]
orchestrator 1.2.1 BETA is released. This version supports Pseudo GTID, and provides one with powerful refactoring of one's replication topologies, even across failed instances. Depicted: moving a slave up the topology even though its local master is inaccessible Enabling Pseudo-GTID You will need to: Inject a periodic unique entry onto your binary logs Configure orchestrator […]
This post describes in detail the method of using Pseudo GTID to achieve unplanned replication topology changes, i.e. connecting two arbitrary slaves, or recovering from a master failure even as all its slaves are hanging in different positions. Please read Pseudo GTID and Pseudo GTID, RBR as introduction. Consider the following case: the master dies unexpectedly, […]
This post continues Pseudo GTID, in a series of posts describing an alternative to using MySQL GTIDs. The solution offered in the last post does not work too well for row based replication. The binary log entries for the INSERT statement look like this: # at 1020 # at 1074 #141020 12:36:21 server id 1 […]
Pseudo GTID is a method to implement a GTID-like solution where slaves are easily connected to one another. This blog post and the following ones will describe work in progress (some 80% completed), where simulation of GTID makes for a good enough basis for refactoring replication topologies. I'm coding this in orchestrator, which already provides […]
MySQL's UUID() and RAND() functions both provide with (pseudo) indeterministic result. UUID()'s result is moreover bound to the host on which it executes. For this reason, both are unsafe to replicate with STATEMENT binlog format. As an example, consider: master> create table test.uuid_test (id int, u varchar(64)); master> insert into test.uuid_test values (1, UUID()); Query […]
Outbrain's orchestrator 1.1.18 is released: Support for orchestrator-agent (see announcement): agent pages, support for agent actions, initiation of seeds (provisioning of new/corrupted servers), auditing of seeds. Clusters dashboard Support for long query auditing SSL Proxy authentication (e.g. apache2 serving as reverse-proxy with LDAP) User control Better slave moving rules. Quick links: Get orchestrator 1.1.18 Read […]
orchestrator-agent is a side-kick, complementary project of orchestrator, implementing a daemon service on one's MySQL hosts which communicates with and accepts commands from orchestrator, built with the original purpose of providing an automated solution for provisioning new or corrupted slaves. It was built by Outbrain, with Outbrain's specific use case in mind. While we release […]