Hello list! I'm planning to buy a small SSD (around 60GB) and use it for bcache in front of my 3x 1TB HDD btrfs setup (mraid1+draid0) using write-back caching. Btrfs is my root device, thus the system must be able to boot from bcache using init ramdisk. My /boot is a separate filesystem outside of btrfs and will be outside of bcache. I am using Gentoo as my system.
I have a few questions: * How stable is it? I've read about some csum errors lately... * I want to migrate my current storage to bcache without replaying a backup. Is it possible? * Did others already use it? What is the perceived performance for desktop workloads in comparision to not using bcache? * How well does bcache handle power outages? Btrfs does handle them very well since many months. * How well does it play with dracut as initrd? Is it as simple as telling it the new device nodes or is there something complicate to configure? * How does bcache handle a failing SSD when it starts to wear out in a few years? * Is it worth waiting for hot-relocation support in btrfs to natively use a SSD as cache? * Would you recommend going with a bigger/smaller SSD? I'm planning to use only 75% of it for bcache so wear-leveling can work better, maybe use another part of it for hibernation (suspend to disk). Regards, Kai -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
