Raid 5 benchmarks, raid 5 performance data from and the phoronix test suite. How raid can give your hard drives ssdlike performance. Ben reported the adaptec controller to give around 310 mbs read performance for raid1, while a raid10,f2 would probably have given around 400 mbs via the adaptec controller, and around 600 mbs with the 6 disks on the motherboard sata controller and a reasonable extra controller. In general, software raid offers very good performance and is relatively easy to maintain. Included in these lists are cpus designed for servers and workstations such as intel xeon and amd epycopteron processors, desktop cpus intel core. Linux raid offerings were done with two ssds of raid0 and raid1 and. A lot of software raids performance depends on the cpu. Linux software raid mdadm testing is a continuation of the earlier standalone benchmarks. Benchmarking and stress testing is sometime necessary to optimize system performance and remove system bottlenecks caused by hardware or software. If you want to use sudo svk st etc for your benchmark, you probably wont find much difference between a single disk. The comparison of these two competing linux raid offerings were done with two ssds of raid0 and raid1 and then four ssds using raid0, raid1, and raid10 levels. There are many all in one dedicated benchmarking tool with a pretty gui available for linux. The drives used for testing were four ocztoshiba trion 150 120gb ssds.
Using mdadm linux soft raid were ext4, f2fs, and xfs while btrfs raid0raid1 was also tested using that filesystems integratednative raid capabilities. However, if disks with different speeds are used in a raid 1 array, overall write performance is equal to the speed of the slowest disk. In this article are some ext4 and xfs filesystem benchmark results on. All drives are attached to the highpoint controller. The results of running a 64kb chunk size on raid5 and raid6 using ext3 and two xfs setups are shown below. Raid 0 definately has performance benifits in software mode. Normal io includes home directory service, mostlyreadonly large file service e. Raid 10 combines mirrors raid 1 with stripes raid 0 for a fast yet redundant array. More robust faulttolerant features and increased performance versus softwarebased. Mdadm comparison, the dualhdd btrfs raid benchmarks, and fourssd raid 0 1 5610 btrfs benchmarks are raid linux benchmarks on these four intel sata 3. Towards availability and maintainability benchmarks. In 2009 a comparison of chunk size for software raid5 was.
I have gone as far as to do testing with the standard centos 6 kernel, kernellt and kernelml configurations. Here are our latest linux raid benchmarks using the very new linux 4. To check out speed and performance of your raid systems, do not use hdparm. They range from simple, quickanddirty tests you can do onthefly to elaborate tests that measure nearly everything about filesystem performance. The goal of this study is to determine the cheapest reasonably performant solution for a 5spindle software raid configuration using linux as an nfs file server for a home office. In this article are some ext4 and xfs filesystem benchmark results on the fourdrive ssd raid array by making use of the linux md raid infrastructure compared to the previous btrfs nativeraid benchmarks. Optane ssd raid performance with zfs on linux, ext4, xfs, btrfs, f2fs. The controller is not used for raid, only to supply sufficient sata ports. Benchmarking linux filesystems on software raid 1 lone. The end result is that raid 10 is speedy because data is written to multiple drives and redundant because. A single drive provides a read speed of 85 mbs and a write speed of 88 mbs. Raid10 requires a minimum of 4 disks in theory, on linux mdadm can create a custom raid 10 array using two disks only, but this setup is generally avoided. Raid10 is mirrored stripes, or, a raid1 array of two raid0 arrays. All raid functions are handled by the host cpu which can severely tax its ability to perform other computations.
I have also tried various mdadm, file system, disk subsystem, and os tunings suggested by a variety of online articles written about linux software raid. The purpose of these usersubmitted performance figures is to give current and potential users of lucene a sense of how well lucene scales. Since laptops dont have a dedicated hardware raid controller, this means that all the operations are done with the help of the cpu right. You can see from the absolute graph that software raid6 gives a huge drop in rewrite and input performance but does not affect block output as severely. Benchmark raid 5 vs raid 10 with and without hyperx. Software raid how to optimize software raid on linux. The xfs filesystem for xfsdefaultnb was created with lazycount1. The ext4 and xfs raid setups were configured using the mdadm utility. Last week i offered a look at the btrfs raid performance on 4 x samsung 970 evo nvme ssds housed within the interesting msi xpanderaero. The theory that he is speaking of is that the read performance of the array will be better than a single drive due to the fact that the controller is reading data from two sources instead of one, choosing the fastest route and increasing read speeds. When doing write speed benchmark, the files were read from the raid5 unit which can read at about 150 mibs, much faster than the 3ware mdadm raid 1 is able to write. We can use full disks, or we can use same sized partitions on different sized drives.
We just need to remember that the smallest of the hdds or partitions dictates the arrays capacity. Raid 1 is good because the failure of any one drive just means the array is offline for longer while it rebuilds, but can still be recovered and that the read performance is as good as raid 0. When it comes to raid systems, overall io performance is probably the best single measure of speed. How to create a software raid 5 in linux mint ubuntu.
Passmark software has delved into the thousands of benchmark results that performancetest users have posted to its web site and produced nineteen intel vs amd cpu charts to help compare the relative speeds of the different processors. The benchmark from there proves disk reads dont benefit from raid1. Durval menezes repeated the above benchmark in oct. A raid 1 will write in the same time the data to both disks taking twice as long as a raid 0, but can, in theory read twice as fast, because will read from one disk a part of the data and from another the other part, so raid 1 is not twice as bad as raid 0, both have their place. Regarding linux software raid, i have gentoo linux em64t latest version compiled with cflags of marchcorei7avx mtunecorei7avx and after a complete recompile tuned for this platform, including the gcc4. Software linux raid 0, 1 and no raid benchmark osnews. Software raid is often specific to the os being used, so it cant generally be used for drive arrays that are shared between operating systems.
Depending on the failed disk it can tolerate from a minimum of n 2 1 disks failure in the case that all failed disk have the same data to a maximum of n 2 disks failure in the. Raid 3 spindle disk rotation is synchronised and each sequential byte is written to a different drive. My own tests of the two alternatives yielded some interesting results. Raid level comparison table raid data recovery services.
If the requirements for an upcoming project is similar to an existing benchmark, you will also have something to work with when designing the. There are a number of benchmarks that can test the io performance of a raid system. In a linux system, this could be done easily with few basic command line tools. I was searching for a while for direct comparison for raid 5 vs raid 10 performance and will virtualisation have any impact on performance but i couldnt find any so i made my own and gonna share it with you guys. The software raid10 driver has a number of options for tweaking block layout that can bring further performance benefits depending on your io load pattern see here for some simple benchmarks though im not aware of any distributions that support this for of raid 10 from install yet only the more traditional nested arrangement. The file size was 900mb, because the four partitions involved where 500 mb each, which doesnt give room for a 1g file in this setup raid1 on two mb arrays. Raid 0, 1, 5, 6, and 10 levels were tested across the four samsung 970. There is some general information about benchmarking software too. In testing both software and hardware raid performance i employed six. You can benchmark the performance difference between running a raid using the linux kernel software raid and a hardware raid card. Synthetic benchmarks show varying levels of performance improvements when multiple hdds or ssds are used in a raid 1 setup, compared with singledrive performance.
Raid 1 data is mirrored on each drive, improving read performance and reliability. The performance of your disk subsystem depends very much on your benchmark. Linux software raid mdadm testing is a continuation of the earlier. A lot of software raids performance depends on the. In testing both software and hardware raid performance i employed six 750gb samsung sata drives in three raid configurations 5, 6, and 10. A case study of software raid systems by aaron brown research project submitted to the department of electrical engineering and computer sciences, university of california at berkeley, in partial satisfaction of. Mdadm is linux based software that allows you to use the operating system to create and handle raid arrays with ssds or normal hdds. Software vs hardware raid performance and cache usage. As of august 2002, this page is no longer actively maintained, and is archived here for historical purposes.