… about death of the RAID. I think this is far from the case especially if you consider Software RAID here. For many workloads you would like to get RAID just for the sake of BBU. As Jeremy mentioned RAID is… write buffering and write merging. Performance is another story. RAID is usually easiest way to get extra performance from your IO subsystem. Spreading…
Post: Intel SSD 910 vs HDD RAID in tpcc-mysql benchmark
September 11, 2012 By 6 Comments
….5″, 7200RPM, 16MB, SATA. Intel SSD 910 (software RAID over 2x200GB devices) Filesystem: ext4 Software OS: Ubuntu 12.04.1 MySQL Version: Percona…, so we can estimate a performance gain. Or in text form: BP sizeHDD RAIDIntel SSD 910Ratio (i910/raid) 25 GB22816207.1 50… MySQL / Percona Server, especially if you are looking for quick performance boost in IO heavy workload.
Comment: Death match! EBS versus SSD price, performance, and QoS
February 22, 2011 By 55 Comments
… in all the testing I’ve done – even for RAID 0. Hardware RAID makes assumptions about the minimum amount of time that… not necessary. I’ve tested Adaptec, LSI, 3ware, Highpoint and software RAID. Software RAID performs best for all SSD that I’ve tested, even the…
Post: EC2/EBS single and RAID volumes IO benchmark
August 6, 2009 By 14 Comments
… template to run in RightScale environment, I noticed that IO performance on EBS volume in EC2 cloud is not quite perfect… as device in your OS, so you can easily make software RAID from several volumes. So I created 4 volumes ( I used… you are looking for IO performance in EC2/EBS environment it’s definitely worth to consider some RAID setup. RAID5 does not…
Post: RAID throughput on FusionIO
March 24, 2010 By 7 Comments
… with maximal possible fsync/sec it is interesting how different software RAID modes affects throughput on FusionIO cards. In short conclusion, RAID10… mode with n2 layout Latest mode you can get creating RAID as: mdadm –create –verbose /dev/md0 –level=10 –layout=n2… really usable, and how it performs on regular hard drives or SSD disks. The performance drop in RAID settings is unexpected. I am…
Post: Benchmarking single-row insert performance on Amazon EC2
May 16, 2012 By 17 Comments
…/O Performance: High API name: m2.4xlarge As for the IO configuration I chose 8 x 200G EBS volumes in software RAID 10… traditional InnoDB log flushing, which can cause downward spikes in performance. Other then that, I have also disabled query cache to… read performance to improve, but they have an impact on the write performance. Well most of the apps rely on read performance and…
Post: Fast storage: 8 SSD Intel X-25M 80GB benchmarks
January 18, 2010 By 15 Comments
…some serialization in Linux software raid or Linux scheduler or on Adaptec hardware level. 2. Cards connected in hardware raids show worse results…connected in hardware raid is doing much better – DEADLINE outperforms CFQ here (which is different from random writes) – Software raid0 performed pretty …
Comment: FlashCache: tpcc workload with FusionIO card as cache
June 8, 2010 By 20 Comments
… drives, they tried hardware RAID, software RAID, RAID 1+0 and RAID 0), but in all cases the RAID controller or software couldn’t predict when the… usable NAND flash on the FusionIO cards to improve write performance during emergency groomer maintenance when the card is out of… down format the cards by 25-35% to get that performance during LEB exhaustion. As for redundancy and stripping FIO cards…
Post: How reliable RAID really is
June 30, 2006 By 13 Comments
This post is not exactly about MySQL Performance or about Performance at all, but I guess it should be interested to … to perform “Verify Media” which can be used to scan hard drive and remap bad blocks. After remapping is done RAID mode… about your data. This is of course not to mention software bugs and user errors which are other reasons why you…
Post: Testing Fusion-io ioDrive2 Duo
May 10, 2012 By 21 Comments
…), which can be connected together via software RAID. So I tested in two modes: single drive, and software RAID-0 over two drives. I… for both single card and raid (Duo). Random writes, async: We see stable and predictable write performance, with throughput: 660 MiB/s…. In general ioDrive2 seems to provide better and more stable performance results comparing to previous generation ioDrive. Follow @VadimTk !function(d…
