快照备份-093

 

 
快照
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#umount /mnt/md0
#fdisk /dev/sdb
        d
p
 --删除分区
#pvcreate /dev/sd{b,c,d}1
#vgcreate myvgname /dev/sdb /dev/sdc
#lvcreate -L 10g -n mylvname myvgname 
#lvdisplay
#mkfs -t ext3 /dev/myvgname/mylvname
#mkdir /mnt/lv
#mount /dev/myvgname/mylvname /mnt/lv
#cp /etc/passwd /mnt/lv
------------------------
#lvcreate -L 100M --snapshot --name 
back(快照名字) /dev/myvgname/mylvname
#mkdir /mnt/back
#mount -o ro /dev/myvgname/back /mnt/back  //一般挂载为只读
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快照备份 
dump 级别 
0 完整备份
1-9 增量备份 
02564    0-2 2-5  5-6 2-4
#dump -0u /mnt/back/ -f /tmp/back.snap
#restore 
#cd /mnt/back
#restore -rf /tmp/back.snap还原备份
#restore -tf /tmp/back.snap查看备份 

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