Hi,
You will need extra local filesystem in Exadata x7,x6,x5 to take backup or export and something like that.
You can mount u02 or oradata from free space of volume group of Exadata per node.
You can do this steps not only exadata but also for all linux systems. If there is any free space on volume group, you can create new mount point from this free volume group.
1. We check the free disk space on the exadata Node.
[root@Devecidbadm02 ~]# vgdisplay --- Volume group --- VG Name VGExaDb System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 5 VG Access read/write VG Status resizable MAX LV 0 Cur LV 4 Open LV 3 Max PV 0 Cur PV 1 Act PV 1 VG Size 1.63 TiB PE Size 4.00 MiB Total PE 428309 Alloc PE / Size 47104 / 184.00 GiB Free PE / Size 381205 / 1.45 TiB VG UUID 7Qwzhd-3La6-8eWB-OJdM-6Cdf-MvCZ-EpKQdX
2. Create /u02 directory for the mount point.
[root@Devecidbadm02 ~]# mkdir /u02
3. create logical volume from free volume group.
[root@Devecidbadm02 ~]# lvcreate --name u02 --size 1400g VGExaDb Logical volume "u02" created
4.Format logical volume like below.
[root@Devecidbadm02 ~]# mke2fs -j /dev/VGExaDb/u02 mke2fs 1.43-WIP (20-Jun-2013) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 78643200 inodes, 314572800 blocks 15728640 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=4294967296 9600 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done
5. Now we can mount the logical volume as /u02
[root@Devecidbadm02 ~]# mount /dev/VGExaDb/u02 /u02
6. You can check it is mounted like below.
[root@Devecidbadm02 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VGExaDb-LVDbSys1 30G 13G 16G 47% / tmpfs 252G 13G 240G 5% /dev/shm /dev/sda1 504M 40M 439M 9% /boot /dev/mapper/VGExaDb-LVDbOra1 99G 63G 31G 67% /u02 /dev/mapper/VGExaDb-u02 1.2T 199M 1.1T 1% /u02
Do you want to learn Exadata detailed, then read the following articles.
Oracle Exadata Tutorials for Beginners – Magic Database Machine
Do you want to learn Oracle Database for Beginners, then read the following articles.
https://ittutorial.org/oracle-database-19c-tutorials-for-beginners/