bcache的安装与配置

1、检查内核是否有bcache模块

参照：https://www.cnblogs.com/sunhaohao/archive/2017/07/03/sunhaohao.html

安装bcache-tools

2、删除销毁bcache

参照：https://yq.aliyun.com/articles/60734

#结构如下： [root@node-105-223 ~]# lsblk NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT sda           8:0    0   1.1T  0 disk └─bcache2   253:2    0   1.1T  0 disk sdc           8:32   0   1.1T  0 disk sdd           8:48   0   1.1T  0 disk sde           8:64   0 744.6G  0 disk ├─sde1        8:65   0   100G  0 part │ └─bcache2 253:2    0   1.1T  0 disk 操作步骤： #将hdd detach echo 1 > /sys/block/sda/bcache/detach #获取ssd的bcache UUID ll /sys/block/sde/sde1/bcache/ #将ssd的bcache UUID写入dcache设备的detach文件 echo 62bf4c55-96bb-422c-95ca-241e9d0f0c27  /sys/block/bcache2/bcache/detach #将hdd stop echo 1 > /sys/block/sda/bcache/stop #将ssd取消注册 echo 1 > /sys/fs/bcache/62bf4c55-96bb-422c-95ca-241e9d0f0c27/unregister #擦除数据 wipefs -a /dev/sde1 wipefs -a /dev/sda

3、构建bcache

#创建backing device make-bcache -B --writeback -w 4KiB /dev/sda --wipe-bcache #创建cache device make-bcache -C -w 4KiB --cache_replacement_policy=lru --writeback /dev/sde1 --wipe-bcache #获取bcache set uuid并关联 ll /sys/block/sde/sde1/bcache/ echo 47f7d596-1d71-4ace-b044-887fedc351ca > /sys/block/sda/bcache/attach

4、修改gc配置

cd /sys/fs/bcache//internal

echo 1 > gc_always_rewrite

echo 1 > copy_gc_enabled

echo 1 > trigger_gc