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tiancheng91 / collection

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https://github.com/tiancheng91/collection/issues
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raid1 冷备份 #73

Open tiancheng91 opened 11 months ago

tiancheng91 commented 11 months ago

md wirte-mostly

  1. 本地磁盘构建raid0, 用于多磁盘并行加速

    sudo mdadm --create --verbose /dev/md0 --level=0 --raid-devices=4 /dev/sda /dev/sdb /dev/sdc /dev/sdd

  2. 本地md0 + 远程磁盘组raid1 用于备份

    sudo mdadm --create --verbose --assume-clean /dev/md1 --level=1 --raid-devices=2 /dev/md0 --write-mostly /dev/sde

  3. 优化raid1 写入性能(不需要等待该磁盘写入成功)

    
sudo mdadm --create --verbose --assume-clean /dev/md1 --level=1 --raid-devices=2  --bitmap=internal  /dev/md0 --write-mostly --write-behind /dev/sde