…you really need to understand how DRBD works as well as how IO system is utilized to understand how much overhead you should expect. First lets…by commit transaction in Innodb storage engine. Moreover these operation could cause (depending on file system and configuration) more synchronous IO …
Comment: How much overhead DRDB could cause ?
May 19, 2009 By 4 Comments
… yours “How much overhead DRDB could cause?”. You have mentioned in the blog and I quote… ………. “If you’re looking for less overhead for DRBD with fast… are getting low cost these days and which could offer significant performance improvements for DRBD. Though you should be already be able…
Post: MySQL Replication vs DRBD Battles
April 28, 2008 By 12 Comments
… is likely to take much longer than that. This is very bad property of DRBD – besides the well understood overhead of committing on… caused by software and hardware bugs rather than known limitations. You could argue depending on cases you spend most time working with how much…
Post: Faster MySQL failover with SELECT mirroring
February 1, 2009 By 9 Comments
… this with shared storage or DRBD, although those provide stronger …cause tons of I/O, etc. In reality, it can be completely unusable for a long time. To measure how much…aggregation options to avoid any overhead of storing and analyzing queries. (I…the tools I used — it could be MySQL Proxy or a…
Post: When would you use SAN with MySQL ?
March 9, 2009 By 18 Comments
…on the goals the advice could be a lot different…. magically means nobody knows how exactly. I would …is not “scaling” as much as you expected. …may have a glitch causing failure and data corruption…I would highly consider DRBD which can do storage… offer snapshots with low overhead allowing to take a …
