… node is before querying it? If its 100% synchronous like DRBD then it will have the same write performance issues I guess as we normally see with DRBD. I am pretty sure there are some real life problems…
Comment: Too many connections? No problem!
March 15, 2012 By 28 Comments
…_buffer_size=12M server-id = 1 log-bin=/data/mysql/drbd expire_logs_days = 5 max_binlog_size = 100M [client] socket…
Post: MySQL Replication vs DRBD Battles
April 28, 2008 By 12 Comments
… could destroy the original master tooâ€, however, is plain false. DRBD won’t “destroy the original master†any more than… replication is however something quite helpful for some environments. Though DRBD also could be extended to support one if needed. Now… of paying extra performance costs. It is worth to note DRBD also allows building very nice mixed environments with MySQL – for…
Post: Data Corruption, DRBD and story of bug
November 29, 2010 By 6 Comments
… is in the case I worked with), you screwed, as DRBD mirroring physical data, and MySQL keeping crashing on both instances – active and passive. So DRBD can’t be considered fully reliable HA solution if there… Availability. And just to be clear, it is not DRBD problem, DRBD basically can’t help if there is possibility that application…
Post: Is DRBD the right choice for me?
July 7, 2009 By 17 Comments
… some data surrounding a failure. So if you are installing DRBD with the aim of purely “availability”, and are not worried… technology. While the prized “1 minute failover” is possible in DRBD, it doesn’t really explain the full picture. The typical crash recovery process in DRBD is a lot longer: After resource transfer, a filesystem check…
Post: How much overhead DRDB could cause ?
June 2, 2008 By 4 Comments
… is often going to define your MySQL on DRBD Performance. Lets now see how DRBD works so we can analyze how much… network communications. It would be actually rather interesting to see DRBD to have direct support for Infiniband or Dolphin interconnect sockets… case we investigated the system and the “surprising” overhead of DRBD perfectly matched system components performance capacity. As a lesson – do…
Post: Finding your MySQL High-Availability solution – The questions
October 16, 2009 By 36 Comments
… manual failover – Master-Master with MMM manager – Heartbeat/SAN – Heartbeat/DRBD – NDB Cluster These technologies are by far, not a one… MMM manager Fair Heartbeat/SAN (depends on SAN) Excellent Heartbeat/DRBD Good NDB Cluster Excellent 5. For what level of growth… on SAN) High, Good MySQL DBA + strong Sysadmin skills Heartbeat/DRBD High, Good MySQL DBA + strong Sysadmin skills NDB Cluster Very…
Comment: How much overhead DRDB could cause ?
May 19, 2009 By 4 Comments
… network communications. It would be actually rather interesting to see DRBD to have direct support for Infiniband or Dolphin interconnect sockets… these days and which could offer significant performance improvements for DRBD. Though you should be already be able to use these… with StorExpress based storage provides the best replication performance for DRBD. For more details, please see http://www.dolphinics.com/products…
Comment: How much overhead DRDB could cause ?
December 10, 2008 By 4 Comments
…-CM with a 32Kb MTU (Useful for other use, not DRBD). I get total synch rate of around 300Mbytes/sec with… random write performance which seems to be affected somewhat by DRBD. RDMA (Used by Infiniband and IWarp NICs) would likey greatly help reduce additional DRBD write latency (More important to most people) and increase usable…
Comment: How much overhead DRDB could cause ?
June 3, 2008 By 4 Comments
… notice much of this. However, for extremely high write loads, DRBD currently does add comparatively large performance penalties percentage-wise. Which… case other readers here are interested in learning more about DRBD performance tuning considerations, I encourage you to watch my blog (http://blogs.linbit.com/florian) for a free DRBD performance tuning webinar we will be announcing shortly. Cheers, Florian
