大数据迁移之DRBD扩容 | 您所在的位置:网站首页 › redis扩容时数据如何迁移 › 大数据迁移之DRBD扩容 |
扩容主/备物理数据盘: [root@MySQL02 ~]# drbdadm down data [root@MySQL02 ~]# mount /dev/sdb1 /mnt/ [root@MySQL02 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 7.2G 1.9G 5.0G 28% / tmpfs 242M 0 242M 0% /dev/shm /dev/sda1 194M 57M 128M 31% /boot /dev/sdb1 380M 11M 350M 3% /mnt # 可以看到备节点磁盘利用率只有380M [root@MySQL02 ~]# parted /dev/sdb p Model: Msft Virtual Disk (scsi) Disk /dev/sdb: 2147MB Sector size (logical/physical): 512B/512B Partition Table: msdos
Number Start End Size Type File system Flags 1 32.3kB 814MB 814MB primary ext4 # 然而备节点真实大小为814M 2 814MB 979MB 165MB primary [root@MySQL02 ~]# umount /mnt/ [root@MySQL02 ~]# e2fsck -f /dev/sdb1 # 查看分区大小 e2fsck 1.41.12 (17-May-2010) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information /dev/sdb1: 38/100744 files (0.0% non-contiguous), 22971/401409 blocks [root@MySQL02 ~]# resize2fs /dev/sdb1 # 重新分配分区(扩容) resize2fs 1.41.12 (17-May-2010) Resizing the filesystem on /dev/sdb1 to 795184 (1k) blocks. The filesystem on /dev/sdb1 is now 795184 blocks long.
[root@MySQL02 ~]# mount /dev/sdb1 /mnt/ [root@MySQL02 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 7.2G 1.9G 5.0G 28% / tmpfs 242M 0 242M 0% /dev/shm /dev/sda1 194M 57M 128M 31% /boot /dev/sdb1 752M 11M 703M 2% /mnt # 备节点磁盘空间已增加至最大 [root@MySQL02 ~]# ls /mnt/ |
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