I'm going to put bcache in write-back mode ..
---------- Forwarded message ---------- From: Giovanni Lenzi <[email protected]> Date: 5 February 2013 09:57 Subject: Fwd: is the fail-over of two bcached volumes in raid 1 really possible? To: [email protected] Hi all, I'm planning to use bcache in a production environment. For failover purposes, I would like to have two cached hard disk in raid 1 via md or dm. ssd1 caching physical hd1(1 or 2 tb) and ssd2 caching physical hd2(1 or 2 tb) Is it possible to raid over bcached volumes? Do you know if SSD or HD failures are correctly handled by software layers above the physical volumes and does not cause disruptive behaviour even in a raid 1 situation? Is there a way to know if one bcache volume in the raid is failing or failed, through something like kernel, bcache or raid logs? I want to put some monitoring tool like nagios on my machine, in order to be notified of all strange events on my volumes. Do you think raid1 will affect performance? I will try this configuration as soon as my ssd will arrive. In case I begin with 1 tb hard disks and would like to switch to 2tb hard disks in the future, I would like to know if is it possible to extend these mirrored cached volumes on the fly and WITHOUT DOWN TIMES? Thanks in advance -- Giovanni -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
