Solaris 11: Criando um pool com espelhamento no ZFS

Solaris 11: Criando um pool com espelhamento no ZFS

O ZFS foi criado com foco na simplicidade. Ele é ao mesmo tempo um sistema de arquivos (como o ext4) e um gerenciador de volumes (como o LVM).

Na instalação padrão do Solaris 11, onde o sistema de arquivos root (/) é montado em ZFS, só tenho o pool rpool (de “root pool”), onde os sistemas de arquivos estão montados.

ricardo@solaris:~$ sudo zpool status
   pool: rpool
  state: ONLINE
   scan: none requested
 config:
 
         NAME        STATE     READ WRITE CKSUM
         rpool       ONLINE       0     0     0
           c3t0d0s0  ONLINE       0     0     0
 
 errors: No known data errors
 ricardo@solaris:~$ df -h
 Filesystem             Size   Used  Available Capacity  Mounted on
 rpool/ROOT/solaris      98G   3.2G        77G     5%    /
 /devices                 0K     0K         0K     0%    /devices
 /dev                     0K     0K         0K     0%    /dev
 ctfs                     0K     0K         0K     0%    /system/contract
 proc                     0K     0K         0K     0%    /proc
 mnttab                   0K     0K         0K     0%    /etc/mnttab
 swap                   9.5G   1.4M       9.5G     1%    /system/volatile
 objfs                    0K     0K         0K     0%    /system/object
 sharefs                  0K     0K         0K     0%    /etc/dfs/sharetab
 /usr/lib/libc/libc_hwcap1.so.1
                         81G   3.2G        77G     5%    /lib/libc.so.1
 fd                       0K     0K         0K     0%    /dev/fd
 rpool/ROOT/solaris/var
                         98G   182M        77G     1%    /var
 swap                   9.5G    12K       9.5G     1%    /tmp
 rpool/export            98G    32K        77G     1%    /export
 rpool/export/home       98G    32K        77G     1%    /export/home
 rpool/export/home/ricardo
                         98G    12M        77G     1%    /export/home/ricardo
 rpool                   98G    39K        77G     1%    /rpool
 /export/home/ricardo    77G    12M        77G     1%    /home/ricardo
 ricardo@solaris:~$

Pelo comando cfgadm, verifico se tenho mais discos disponíveis, além do utilizado no rpool.

ricardo@solaris:~$ sudo cfgadm -s "select=type(disk)"
 Ap_Id                          Type         Receptacle   Occupant     Condition
 sata6/0::dsk/c3t0d0            disk         connected    configured   ok
 sata6/2::dsk/c3t2d0            disk         connected    configured   ok
 sata6/3::dsk/c3t3d0            disk         connected    configured   ok

Crio então um pool chamado test, utilizando os dois discos disponíveis, com espelhamento entre eles.

ricardo@solaris:~$ sudo zpool create test mirror c3t2d0 c3t3d0
 ricardo@solaris:~$ sudo zpool status
   pool: rpool
  state: ONLINE
   scan: none requested
 config:
 
         NAME        STATE     READ WRITE CKSUM
         rpool       ONLINE       0     0     0
           c3t0d0s0  ONLINE       0     0     0
 
 errors: No known data errors
 
   pool: test
  state: ONLINE
   scan: none requested
 config:
 
         NAME        STATE     READ WRITE CKSUM
         test        ONLINE       0     0     0
           mirror-0  ONLINE       0     0     0
             c3t2d0  ONLINE       0     0     0
             c3t3d0  ONLINE       0     0     0
 
 errors: No known data errors

Neste momento o sistema de arquivos já está montado e pronto para uso.

ricardo@solaris:~$ ls -lh /test/
 total 0
 ricardo@solaris:~$ sudo mkfile 1g /test/ArquivoTeste
 ricardo@solaris:~$ ls -lh /test/
 total 1963283
 -rw------T   1 root     root        1.0G May  3 08:22 ArquivoTeste
 ricardo@solaris:~$ sudo zpool status
   pool: rpool
  state: ONLINE
   scan: none requested
 config:
 
         NAME        STATE     READ WRITE CKSUM
         rpool       ONLINE       0     0     0
           c3t0d0s0  ONLINE       0     0     0
 
 errors: No known data errors
 
   pool: test
  state: ONLINE
   scan: none requested
 config:
 
         NAME        STATE     READ WRITE CKSUM
         test        ONLINE       0     0     0
           mirror-0  ONLINE       0     0     0
             c3t2d0  ONLINE       0     0     0
             c3t3d0  ONLINE       0     0     0
 
 errors: No known data errors
 ricardo@solaris:~$ df -h
 Filesystem             Size   Used  Available Capacity  Mounted on
 rpool/ROOT/solaris      98G   3.2G        77G     5%    /
 /devices                 0K     0K         0K     0%    /devices
 /dev                     0K     0K         0K     0%    /dev
 ctfs                     0K     0K         0K     0%    /system/contract
 proc                     0K     0K         0K     0%    /proc
 mnttab                   0K     0K         0K     0%    /etc/mnttab
 swap                   9.5G   1.4M       9.5G     1%    /system/volatile
 objfs                    0K     0K         0K     0%    /system/object
 sharefs                  0K     0K         0K     0%    /etc/dfs/sharetab
 /usr/lib/libc/libc_hwcap1.so.1
                         81G   3.2G        77G     5%    /lib/libc.so.1
 fd                       0K     0K         0K     0%    /dev/fd
 rpool/ROOT/solaris/var
                         98G   182M        77G     1%    /var
 swap                   9.5G    12K       9.5G     1%    /tmp
 rpool/export            98G    32K        77G     1%    /export
 rpool/export/home       98G    32K        77G     1%    /export/home
 rpool/export/home/ricardo
                         98G    12M        77G     1%    /export/home/ricardo
 rpool                   98G    39K        77G     1%    /rpool
 /export/home/ricardo    77G    12M        77G     1%    /home/ricardo
 test                   9.8G   1.0G       8.8G    11%    /test
 ricardo@solaris:~$