…’m using a mdadm-software-raid (because the onboard-raids are software too) but if you need a real hardware-raid you can get one from…
Comment: LVM Configuration mistake to Avoid
July 10, 2008 By 10 Comments
… of the hardware RAID controller and the other four drives (72GB@15k) on the second channel. Next we created 3 hardware RAID1 volumes… data volumes into one using software RAID0, because some benchmarking showed that software RAID0 performed better than hardware RAID0 in our case. Now…
Post: Heikki Tuuri answers to Innodb questions, Part II
November 4, 2007 By 13 Comments
… and sequential which can be very well taken care of RAID Battery Backed Up cache and when sequentially written to the… no more have to go with SCSI interface both in hardware and software. I’m still surprised with databases being so much…? HT: Contention and thread thrashing depends very much on the hardware, and also on the OS version. In our tests, removing…
Post: How much overhead DRDB could cause ?
June 2, 2008 By 4 Comments
… your hardware RAID card or something which has same effect, especially as it become pretty cheap these days. With good RAID as I… is nothing wrong with DRBD, it is great piece of software and it is not what it is running slow but…
Post: Innodb Double Write
August 4, 2006 By 24 Comments
…. Also if software RAID is used page may come on the stripe border requiring multiple IO requests. Same happens with Hardware RAID on power…
Comment: Clustrix benchmarks under tpcc-mysql workload
October 27, 2011 By 9 Comments
… really comes into play is internal locking, and under-laying hardware has less effect. I did not look what is bottleneck… systems. However it is worth to mention that it was software RAID0, not hardware RAID.
Post: Reasons for MySQL Replication Lag
July 29, 2011 By 9 Comments
… of replication lag Hardware Faults Hardware faults may cause reduced performance causing replication to lag. Failed hard drive getting RAID in degraded mode… lag. Same may happen with operating system and other system software involved. In could be even system which queries mysql. I…
Post: Rendundant Array of Inexpensive Servers
August 21, 2008 By 15 Comments
…magnitude more availability issues caused by their own software bugs, DOS attacks and other issues. However …the system so it can tolerate hardware failures should we bother about hardware quality at all ? The …or cost savings are worth it. Another good RAID question is if Hot Spare should be used…
Comment: RAID and Scale Out Discussions
June 12, 2007 By 3 Comments
… that I think software RAID is an symptom of RAIDs death…. It’s a nail in the coffin. We use software RAID but there are… think to many considerations are being made thinking about commodity hardware and really smart people, while in most cases tasks have… think the death will be 3-5 years out. The software infrastructure needs to become stable enough so that commodity people…
Post: The Math of Automated Failover
September 18, 2012 By 9 Comments
… right decision. Second is the configuration issue – which can be hardware configuration such as redundant network paths, STONITH, as well as… online). If you follow some of these principles and if software implements them properly there might be less issue with taking… many hardware failure and misconfiguration scenarios which can result in performance problem on single node only such as disk failing in RAID…
