I am having a problem with BCache. I’ve followed the documentation and have my cache attached. Here is what dmesg tells me:
[ 372.622905] bcache: invalidating existing data [ 372.637517] bcache: registered cache device rssda1 [ 400.704672] bcache: Caching dm-2 as bcache0 on set 16fd7139-f018-461c-9d9e-daa I warmed up the cache by using an application (vdbench) to do random reads over a 10GB region. Everything looks good as the response time comes down as the cache warms up. But, for some reason the cache_hit_rate is showing 90% and yet I’m still seeing heavy activity to the disk device. bwalker@nellis:~> cat /sys/fs/bcache/16fd7139-f018-461c-9d9e-daa7666c7f1e/stats_total/cache_hit_ratio 94 bwalker@nellis:~> Any ideas on why this might be happening are appreciated. -brad w. -- 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
