HANA数据库服务器备份卷扩容（Linux LVM）

HANA数据库备份出现错误，从错误上看明细是备份盘的孔家满了。
[447] backup could not be completed, [2000008] Error during asynchronous file transfer (io_getevents), rc=28: No space left on device; $fileCallback$=[W] , buffer= 

1.在AWS控制台中扩展卷，从1000G变成2000G
2.登录到机器中fdisk-l,看到磁盘大小实际上不变
3.以为需要umount，结果umount是提示失败
HANADBPRD:/hana/hanabackup/data # umount /hana/hanabackup
umount: /hana/hanabackup: target is busy
        (In some cases useful info about processes that
         use the device is found by lsof(8) or fuser(1).)
HANADBPRD:/hana/hanabackup/data # fuser -mv /hana/hanabackup
                     USER        PID ACCESS COMMAND
/hana/hanabackup:    root     kernel mount /hana/hanabackup
                     root       4031 ..c.. bash          
                     root      14117 ..c.. fuser             --c表示进程是在该目录下启动
                     root      48758 ..c.. bash
                     s4padm    45588 F.... hdbindexserver    --F表示打开文件
HANADBPRD:/hana/hanabackup/data # lsof /hana/hanabackup
COMMAND   PID USER   FD   TYPE DEVICE SIZE/OFF       NODE NAME
bash     4031 root  cwd    DIR  254,3       69  193017069 /hana/hanabackup/data
lsof    14201 root  cwd    DIR  254,3       69  193017069 /hana/hanabackup/data
lsof    14202 root  cwd    DIR  254,3       69  193017069 /hana/hanabackup/data
bash    48758 root  cwd    DIR  254,3     4096 1074766613 /hana/hanabackup/data/DB_S4P
4.修改归档日志备份配置
因为是HANA的备份设置备份到此文件夹，避免强行卸载后系统备份出现问题导致系统夯住，所以就先修改备份配置
在hana studio中以system登录，backup and recover---configuration,将log backup settings中将日志归档disable.

5.强制卸载卷 umount -l /home
6.扩容还是失败
HANADBPRD:/hana/hanabackup # growpart /dev/xvvvv4n1 1
WARN: unknown label 
failed [sfd_dump:1] sfdisk --unit=S --dump /dev/xvvvv4n1
sfdisk: /dev/xvvvv4n1: does not contain a recognized partition table
FAILED: failed to dump sfdisk info for /dev/xvvvv4n1
HANADBPRD:/ # mount /dev/xvvvv4n1 /hana/hanabackup
mount: unknown filesystem type 'LVM2_member'
原来是用LVM进行管理的，其实都可以不用umount的

7.LVM扩容
---查看卷组
HANADBPRD:/ # vgs  
  VG            #PV #LV #SN Attr   VSize    VFree
  vg_hana         3   3   0 wz--n- 1001.99g 1.99g
  vg_hanabackup   1   1   0 wz--n- 1000.00g    0 
---查看物理卷
HANADBPRD:/ # pvs
  PV           VG            Fmt  Attr PSize    PFree
  /dev/xvme2n1 vg_hana       lvm2 a--   334.00g    0 
  /dev/xvvvv4n1 vg_hanabackup lvm2 a--  1000.00g    0 
  /dev/xvme4n1 vg_hana       lvm2 a--   334.00g 1.99g
  /dev/xvme6n1 vg_hana       lvm2 a--   334.00g    0 
--扩容物理卷
HANADBPRD:/ # pvresize -v /dev/nvvvv4n1
    Using physical volume(s) on command line.
    Archiving volume group "vg_hanabackup" metadata (seqno 3).
    Resizing volume "/dev/nvvvv4n1" to 4194304000 sectors.
    Resizing physical volume /dev/nvvvv4n1 from 0 to 511999 extents.
    Updating physical volume "/dev/nvvvv4n1"
    Creating volume group backup "/etc/lvm/backup/vg_hanabackup" (seqno 4).
  Physical volume "/dev/nvvvv4n1" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized
--查看物理卷，此时磁盘已经成了2T
HANADBPRD:/ # pvs
  PV           VG            Fmt  Attr PSize   PFree   
  /dev/nvvvv4n1 vg_hanabackup lvm2 a--    1.95t 1000.00g
---查看卷组
HANADBPRD:/ # vgs
  VG            #PV #LV #SN Attr   VSize    VFree   
  vg_hanabackup   1   1   0 wz--n-    1.95t 1000.00g
---查看逻辑卷，逻辑卷还是没有变化
HANADBPRD:/ # lvs
  LV            VG            Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert                                               
  lv_hanabackup vg_hanabackup -wi-ao---- 1000.00g  
--扩展逻辑卷，                                                
HANADBPRD:/ # lvextend -L +1000g /dev/vg_hanabackup/lv_hanabackup
  Size of logical volume vg_hanabackup/lv_hanabackup changed from 1000.00 GiB (255999 extents) to 1.95 TiB (511999 extents).
  Logical volume lv_hanabackup successfully resized
---查看逻辑卷，逻辑卷已变大
HANADBPRD:/ # lvs
  LV            VG            Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv_hanadata   vg_hana       -wi-ao---- 400.00g                                                    
  lv_hanalog    vg_hana       -wi-ao---- 300.00g                                                    
  lv_hanashared vg_hana       -wi-ao---- 300.00g                                                    
  lv_hanabackup vg_hanabackup -wi-ao----   1.95t  
--挂载卷并扩容，df- h中，逻辑卷还是没有扩容，
此时必须扩容卷，这个地方很容易卡住，主要原因是需要看你的文件系统用不同的工具命令：
resize2fs针对ext2/ext3/ext4 file system resize
xfs的需要使用xfs_growfs
HANADBPRD:/ # mount /dev/mapper/vg_hanabackup-lv_hanabackup /hana/hanabackup
HANADBPRD:/ # xfs_growfs /hana/hanabackup
meta-data=/dev/mapper/vg_hanabackup-lv_hanabackup isize=512    agcount=4, agsize=65535744 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=262142976, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=127999, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 262142976 to 524286976
-查看卷大小，这个时候已经是2T了。
--df -h 
/dev/mapper/vg_hanabackup-lv_hanabackup  2.0T  733G  1.3T  37% /hana/hanabackup

8.进入hana statuio中重新启动自动归档的功能。