… Cluster Feature 2: Multi-Master replication Create 3 nodes XtraDB Cluster in 3 minutes Benchmarking Galera replication overhead Percona Server 5.5.15 + Galera 21.1-beta2 State of the art: Galera – synchronous replication for InnoDB…
Post: Benchmarking Galera replication overhead
October 13, 2011 By 12 Comments
… performance. Of course you may expect performance overhead, as in case with Galera replication we add some network roundtrip and certification process… as storage to minimize IO overhead Software: Percona-Server-5.5.15 regular and with Galera replication. During tests I measure throughput…
Post: How expensive is MySQL Replication for the Master
January 16, 2010 By 13 Comments
I generally thought about MySQL replication as being quite low overhead on Master, depending on number of Slaves. What kind of …. In most cases having some 10 slaves are relatively low overhead not impacting master performance a lot. I however ran into… tunable as more rare wakeups are less overhead but they are also can impact replication latency a bit. It is also possible…
Comment: State of the art: Galera - synchronous replication for InnoDB
October 29, 2009 By 13 Comments
… on the number of nodes even less. That said, Galera replication overhead may be significant regardless of the number of nodes. You… gives the best performance on a standalone server. Much bigger overhead comes from certification conflicts and resulting transaction rollbacks. The conflict…
Post: How much overhead DRDB could cause ?
June 2, 2008 By 4 Comments
… why bother with DRBD at all and not use MySQL replication instead. So assuming you have innodb_flush_log_at_trx… system components is what is causing such overhead. If you’re looking for less overhead for DRBD with fast storage (ie BBU… a lesson – do not take the overhead as a number but learn where this overhead comes from so you can find how…
Post: Estimating Replication Capacity
July 20, 2010 By 4 Comments
…. So what is replication capacity I call replication capacity the ability to replicate the master load. If replication is able to replicate 3 times the… will call “replication load” the inverse of replication capacity – this is basically what percentage of time the replication thread was busy replicating events vs… idle. Of course running processlist very aggressively can be an overhead especially if it is busy system with a lot of…
Post: MySQL Replication vs DRBD Battles
April 28, 2008 By 12 Comments
… is very bad property of DRBD – besides the well understood overhead of committing on both nodes instead of one you also… MySQL Replication, such as filtered replication or cross storage engine replication, though which are not typically used for HA purposes. Time Delayed replication is… may happen with async replication. Another similar case is when you’re looking to ensured consistency – MySQL Replication can out of sync…
Post: Thoughts on MySQL Replication
July 7, 2006 By 18 Comments
… will start use 90% of their resources for replication (forget for the second replication being single thread, which just makes things worse… if write load growth by only 50%. – Delays in replication MySQL replication is fast which means in average delay is small. Typically… sure update made it to them – this one has large overhead so should be used only for absolutely critical updates. Third…
Post: Announcement of Percona XtraDB Cluster (alpha release)
January 9, 2012 By 30 Comments
… Percona XtraDB Cluster provides: Synchronous replication. Transaction either commited on all nodes or none. Multi-master replication. You can write to any…: Benchmarking Galera replication overhead Percona Server 5.5.15 + Galera 21.1-beta2 State of the art: Galera – synchronous replication for InnoDB mbgc…
Post: No more MySQL Crash Safe Replication in 5.0 ?
January 29, 2008 By 7 Comments
… know even if you’re only using Innodb tables your replication is not completely crash safe – if Slave MySQL Server crashes… in master log files up to which replication was done: InnoDB: In a MySQL replication slave the last master binlog file InnoDB… getting Crash Safe replication with MySQL is not impossible but surely more complicated and has much higher performance overhead – you can run…
