Or controller which also called software RAID or hardware RAID. So, what are the pros and cons of software RAID vs.hardware RAID?Ī simple way to describe software RAID is that the RAID task runs on the CPU of the computer system. Processing is required to carry out those actions, and that can take place on the host server's OS or in the storage array The different modes (mirroring, striping and parity) are used to define the different RAID levels. RAID levels greater than RAID 0 provide protection against unrecoverable sector read errors, as well as against failures of whole physical drives. Each scheme, or RAID level, provides a different balance among the key goals: reliability, availability, performance, and capacity. The different schemes, or data distribution layouts,Īre named by the word "RAID" followed by a number, for example RAID 0 or RAID 1. RAID is a data storage virtualization technology that combines multiple physical disk drive components into one or more logical units for the purposes of data redundancy, performance improvement, or both.ĭata is distributed across the drives in one of several ways, referred to as RAID levels, depending on the required level of redundancy and performance. RAID is an acronym for Redundant Array of Independent Disks. RAID is now found everywhere–from operating system software features to stand-alone controllers providing advanced data integrity in high-end storage area networks. In the last couple of years, RAID technology has grown from a server option to a data protection requirement. Latency : target=0, window=0, percentile=100.Software RAID VS. That system has four spinning disks in a raidz2 for i in do fio -directory=/mnt/pve/proxhosts_tafi -name=async_write_iops -rw=randread -bs=4K -direct=1 -sync=0 -numjobs=1 -ioengine=libaio -iodepth=64 -refill_buffers -runtime=300 -time_based -size=1G doneĪsync_write_iops: (g=0): rw=randread, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=64Īsync_write_iops: Laying out IO file (1 file / 1024MiB) I should also note the storage tested here is an NFS mount of a TrueNAS 13.0-U1 box on the same subnet. Let me know if anyone wants to see the output of all five iterations of each test. I've also pasted the result from a pveperf test run after both sets of fio benchmarks. I'm pasting the full output below of iteration 1 from each test. I ran each test five times and saw very consistent results. Thanks in advance for your configuration clues! I'm unclear on which is preferable, and could use your guidance before rebuilding this server. A few say hardware RAID is OK but use it with caching disabled. Reading through other threads here, most seem to suggest going with ZFS software RAID. Pveperf reports relatively slow performance, especially with pveperf The controller is currently configured for a RAID 6 array with read and write caches enabled. In my lab I installed Proxmox VE 7.2 on this relatively old Supermicro server with an LSI MegaRAID 9260-4i controller with 4 x Seagate Ironwolf 1TB NAS drives. On a Supermicro server with a LSI 9260-i4 RAID controller and no battery backup with 4 HDDs attached, is it better to use software RAID with ZFS over hardware RAID? Why or why not? I'm new to Proxmox, and am looking for config recommendations to ensure the best balance of performance and data integrity.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |