扩大LVM容量 /根目录容量

[root@a ~]# df文件系统               1K-块        已用     可用 已用% 挂载点/dev/mapper/VolGroup00-LogVol00                       6983168   2909812   3712908  44% /系统分区的VG是VolGroup00，VL是LogVol00这里我们增加一块硬盘/dev/sdb

 

1.将/dev/sdb建立为pv[root@a ~]# pvcreate /dev/sdb  Physical volume "/dev/sdb" successfully created

 

2.由于系统已经有了VG：VolGroup00，这里直接将新建的pv加入到系统VG：VolGroup00[root@a ~]# vgextend VolGroup00 /dev/sdb  Volume group "VolGroup00" successfully extended

 

3.给LogVol00系统LV增加1G的空间[root@a ~]# lvextend -L +1G /dev/VolGroup00/LogVol00  Extending logical volume LogVol00 to 7.88 GB  Logical volume LogVol00 successfully resized

 

4.LV扩容之后需要激活修改的配置[root@a ~]# resize2fs /dev/VolGroup00/LogVol00resize2fs 1.39 (29-May-2006)Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing requiredPerforming an on-line resize of /dev/VolGroup00/LogVol00 to 2064384 (4k) blocks.The filesystem on /dev/VolGroup00/LogVol00 is now 2064384 blocks long.[root@a ~]# resize2fs /dev/VolGroup00/LogVol00resize2fs 1.35 (28-Feb-2004)/dev/VolGroup00/LogVol00 is mounted; can't resize a mounted filesystem!You can useext2online /dev/mapper/VolGroup00-LogVol00instead of "resize2fs /dev/VolGroup00/LogVol00", to extend an online / fsThanks.好像ext2online把e2fsck -f 和resize2fs一起完成了！

5.查看扩容之后的系统分区[root@a ~]# df -l文件系统               1K-块        已用     可用 已用% 挂载点/dev/mapper/VolGroup00-LogVol00                       7998912   2909816   4676232  39% //挂载点的总容量增加了1G，扩容成功

 

再来查看VolGroup00参数[root@a ~]# vgdisplay -v VolGroup00    Using volume group(s) on command line    Finding volume group "VolGroup00"  --- Volume group ---  VG Name               VolGroup00  System ID               Format                lvm2  Metadata Areas        2  Metadata Sequence No  7  VG Access             read/write  VG Status             resizable  MAX LV                0  Cur LV                2  Open LV               2  Max PV                0  Cur PV                2  Act PV                2  VG Size               10.84 GB  PE Size               32.00 MB  Total PE              347  Alloc PE / Size       284 / 8.88 GB  Free  PE / Size       63 / 1.97 GB    //还有剩余空间可以分配  VG UUID               vPFrNV-lcZz-ZiAA-oZpt-VqWZ-gIC3-RCuJG7     --- Logical volume ---  LV Name                /dev/VolGroup00/LogVol00  VG Name                VolGroup00  LV UUID                9QP8xz-w6dQ-luU0-y52W-1vct-1BvG-zKjLO8  LV Write Access        read/write  LV Status              available  # open                 1  LV Size                7.88 GB  Current LE             252  Segments               2  Allocation             inherit  Read ahead sectors     auto  - currently set to     256  Block device           253:0     --- Logical volume ---  LV Name                /dev/VolGroup00/LogVol01  VG Name                VolGroup00  LV UUID                DWTtvU-SwNi-6Vho-HetD-O2a0-hSRV-F8AYi1  LV Write Access        read/write  LV Status              available  # open                 1  LV Size                1.00 GB  Current LE             32  Segments               1  Allocation             inherit  Read ahead sectors     auto  - currently set to     256  Block device           253:1     --- Physical volumes ---   //在这个VG中有两块物理硬盘  PV Name               /dev/sda2       PV UUID               594r8z-ROTL-2VBc-DPlr-f4iG-Blx5-Vu1I81  PV Status             allocatable  Total PE / Free PE    252 / 0     PV Name               /dev/sdb       PV UUID               1R1H2t-f2DP-hYCQ-hkBE-HtmD-2kZy-2Bj4TY  PV Status             allocatable  Total PE / Free PE    95 / 63

 

对lvm2创建的LVM卷来说，容量大小取决于kernel的限制 （当然，还有你的磁盘空间）64位，2.6，最大8EB32位，2.6，最大16TB