MD RAID-10 results seems to be way off and just can't be true that MD RAID10 is slower then MD RAID1. I guess that there is some big configuration problems, miss alignment of the partition or something else I guess.
@Michael - If you have time you can try to erase the 4x SSD's recreate the MD-RAID10 array and re-run the tests, I will be very curious what will be the results.
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Btrfs RAID vs. Linux Software RAID Benchmarks On Linux 4.7
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Originally posted by duby229 View Post
I fully agree with you. An array of disks is meant so that machine stays functioning on drive failure. Data backup is something totally different. It shocks me how many people implement RAID as their only means of data protection.
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Does btrfs implement paralel read for RAID1? AFAIK single process (thread?) will read only from single disk currently.
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Originally posted by Dick Palmer View Post
RAID != backup
If your data matters at all you'll be needing backup.
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Originally posted by stiiixy View PostNot an ideal situation if you've planned on a 4-disc array because your data matters that much.
RAID != backup
If your data matters at all you'll be needing backup.
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Originally posted by macemoneta View Post
The RAID-1 concepts are different. In BTRFS, RAID-1 is filesystem RAID-1, so there are always only two copies of the data no matter how many drives. MD RAID-1 mirrors the data to each drive (four copies in a four-drive RAID-1). That's why BTRFS gets faster; only two writes per written data block vs. N-writes.
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Originally posted by Qaridariumfor me the BTRFS results are impressive... in theory BTRFS should be much slower because of the "Copy on Write" concept. but the more harddrives the faster it becomes really impressive.
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Originally posted by Qaridariumfor me the BTRFS results are impressive... in theory BTRFS should be much slower because of the "Copy on Write" concept. but the more harddrives the faster it becomes really impressive.
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Btrfs RAID vs. Linux Software RAID Benchmarks On Linux 4.7
Phoronix: Btrfs RAID vs. Linux Software RAID Benchmarks On Linux 4.7
Earlier this month I carried out some 4-disk Btrfs RAID benchmarks using four SATA 3.0 SSDs. Those tests were done using the Btrfs built-in RAID capabilities while today are some comparison tests against those numbers when using the Linux Software RAID setup via mdadm.
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