Linux ZFS notes

Building Oracle on ZFS.  Notes to myself.
Using this site:
https://wiki.archlinux.org/index.php/ZFS

I had to run this command.

[root@localhost /]# ls -lah /dev/disk/by-uuid/
total 0
drwxr-xr-x. 2 root root 120 May  1 12:12 .
drwxr-xr-x. 4 root root  80 May  1 12:12 ..
lrwxrwxrwx. 1 root root  10 May  1 12:12 103f2159-ec00-4726-84f2-628ec540095f -> ../../sda1
lrwxrwxrwx. 1 root root  10 May  1 12:12 318cbbf1-fed3-44c3-b437-62f435958066 -> ../../sdb1
lrwxrwxrwx. 1 root root  10 May  1 12:12 3bc3f01c-4e52-4c7d-aa2d-d399c67db8f2 -> ../../sda2
lrwxrwxrwx. 1 root root  10 May  1 12:12 e652f8c6-e07f-418f-81ad-c88e774ec5c0 -> ../../sda3
[root@localhost /]#

I had to destroy the first pool.


[root@localhost /]# zpool create -f -m /data bigdata sdb
[root@localhost /]# zpool status bigdata
  pool: bigdata
 state: ONLINE
  scan: none requested
config:

        NAME        STATE     READ WRITE CKSUM
        bigdata     ONLINE       0     0     0
          sdb       ONLINE       0     0     0

errors: No known data errors
[root@localhost /]#

Starting over.  Created three drives.

[root@localhost ~]# parted --list
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sda: 53.7GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number  Start   End     Size    Type     File system     Flags
 1      1049kB  316MB   315MB   primary  ext4            boot
 2      316MB   51.6GB  51.3GB  primary  ext4
 3      51.6GB  53.7GB  2114MB  primary  linux-swap(v1)

Error: /dev/sdb: unrecognised disk label
Error: /dev/sdc: unrecognised disk label
Error: /dev/sdd: unrecognised disk label
[root@localhost ~]# ls -lah /dev/disk/by-id/
ls: cannot access /dev/disk/by-id/: No such file or directory
[root@localhost ~]# ls -lah /dev/by-id/
ls: cannot access /dev/by-id/: No such file or directory
[root@localhost ~]# ls -lah /dev/disk/by-uuid/
total 0
drwxr-xr-x. 2 root root 100 May  2 05:56 .
drwxr-xr-x. 4 root root  80 May  2 05:56 ..
lrwxrwxrwx. 1 root root  10 May  2 05:56 103f2159-ec00-4726-84f2-628ec540095f -> ../../sda1
lrwxrwxrwx. 1 root root  10 May  2 05:56 3bc3f01c-4e52-4c7d-aa2d-d399c67db8f2 -> ../../sda2
lrwxrwxrwx. 1 root root  10 May  2 05:56 e652f8c6-e07f-418f-81ad-c88e774ec5c0 -> ../../sda3

zpool create -f -m /data bigdata raidz sdb sdc sdd

[root@localhost ~]# zpool status
  pool: bigdata
 state: ONLINE
  scan: none requested
config:

        NAME        STATE     READ WRITE CKSUM
        bigdata     ONLINE       0     0     0
          raidz1-0  ONLINE       0     0     0
            sdb     ONLINE       0     0     0
            sdc     ONLINE       0     0     0
            sdd     ONLINE       0     0     0

errors: No known data errors

And finally

Turned SELinux off as ZFS is not supported.

[root@localhost ~]# chkconfig zfs on

[root@localhost ~]# service zfs start

Mounting automounted ZFS filesystems:                      [  OK  ]

Exporting ZFS filesystems:                                 [  OK  ]

[root@localhost ~]# df -h

Filesystem            Size  Used Avail Use% Mounted on

/dev/sda2              47G  9.2G   36G  21% /

tmpfs                 497M  1.7M  495M   1% /dev/shm

/dev/sda1             291M   57M  220M  21% /boot

bigdata                20G  128K   20G   1% /data

[root@localhost ~]#