Linux 5.10 To See RAID10 DISCARD Improvement - From 259 Seconds To Less Than 1 Second

[phoronix]

Phoronix: Linux 5.10 To See RAID10 DISCARD Improvement - From 259 Seconds To Less Than 1 Second

Queued today into the block subsystem's "-next" area ahead of the Linux 5.10 cycle kicking off next month are some MD RAID enhancements...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-5.10-Faster-RAID10-Trim

[caligula]

Is it a good idea to use MD RAID5 anymore? Now that there are systems like ZFS and Btrfs.

[foobaz]

MD RAID 5 is faster than ZFS RAID-Z1, but also less resilient against data loss due to the RAID write hole. Btrfs RAID 5 has the same characteristics as MD RAID 5 - it's fast but a power outage can cause data loss.

[stiiixy]

A power outage causing data lose in a methodology (R5) that's meant to prevent data loss.

FFS.

Glad I gave up BTRFS.

[jo-erlend]

A power outage causing data lose in a methodology (R5) that's meant to prevent data loss.

FFS.

Glad I gave up BTRFS.

I don't see that as a problem at all. If your data is important, then why would you allow power outage?

[Zan Lynx]

A power outage causing data lose in a methodology (R5) that's meant to prevent data loss.

FFS.

Glad I gave up BTRFS.

I wouldn't run RAID 5 or 6 with MD RAID either. For those the only good option is a hardware card.

I'm running btrfs RAID-10 with six drives and a second RAID-1 of two SSD drives. It's pretty great.

[stiiixy]

R10 was what I settled on as well. 5/6 clearly haven't settled down.

Good ol' disconnected HDD's shoved in a cupboard for restoration. Personal use only =D

[RussianNeuroMancer]

Is it a good idea to use MD RAID5 anymore?

No

https://www.zdnet.com/article/why-raid-5-stops-working-in-2009/

https://www.zdnet.com/article/why-raid-6-stops-working-in-2019/