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

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#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