Relatório do ZFS sobre o uso de todos os usuários

Question

Eu tenho um sistema de arquivos ZFS com mais de 35 TB de dados com um número desconhecido de pessoas que adicionaram dados. Como posso obter um relatório de uso de cada usuário como saída do zfs get userused @ {uid} sem conhecer todos os usuários que possuem dados no sistema de arquivos zfs?

    

Answer 1

Você pode fazer isso com zfs userspace (e zfs groupspace ), que mostra todos os usuários que possuem arquivos dentro de um sistema de arquivos (ou seja, o proprietário atual do arquivo) ou uma cota dentro de um sistema de arquivos (definida por zfs set userquota ) ou ambos. Observe que ele não é recursivo (semelhante a zfs list , portanto, talvez seja necessário chamá-lo para cada sistema de arquivos filho.

Exemplo de script de shell

#!/bin/ksh

# get all children file systems from given file system argument
filesystems=$(zfs list -Hro name "${1}")

# get all space usage line by line in the format
# <usedspace>\t<userquota>\t<username>\t<filesystem>\n
# (it can later be sorted by the first column)
for filesystem in ${filesystems}; do
    sizes=$(zfs userspace -Hp -o used,quota,name "${filesystem}")
    IFS=$'\n'

    # multi-line output of userspace makes inner loop necessary
    for size in ${sizes}; do
        printf "%s\t%s\n" "${size}" "${filesystem}"
    done
    unset IFS
done

Exemplo de saída

root@host:/root# ./test.sh rpool | sort -rn
cannot get used/quota for rpool/dump: dataset is busy
cannot get used/quota for rpool/swap: dataset is busy
4273131520      none    root    rpool/ROOT/omnios-2
4197847040      none    root    rpool/ROOT/omnios-1
2681162240      none    root    rpool/ROOT/omnios
[...]

Detalhes da página de manuseio com opções disponíveis

 zfs userspace [-Hinp] [-o field[,field]...] [-s field]... [-S field]...
   [-t type[,type]...] filesystem|snapshot
   Displays space consumed by, and quotas on, each user in the specified
   filesystem or snapshot. This corresponds to the userused@user and
   userquota@user properties.

   -H  Do not print headers, use tab-delimited output.

   -S field
       Sort by this field in reverse order. See -s.

   -i  Translate SID to POSIX ID. The POSIX ID may be ephemeral if no
       mapping exists.  Normal POSIX interfaces (for example, stat(2), ls
       -l) perform this translation, so the -i option allows the output
       from zfs userspace to be compared directly with those utilities.
       However, -i may lead to confusion if some files were created by an
       SMB user before a SMB-to-POSIX name mapping was established. In
       such a case, some files will be owned by the SMB entity and some by
       the POSIX entity. However, the -i option will report that the POSIX
       entity has the total usage and quota for both.

   -n  Print numeric ID instead of user/group name.

   -o field[,field]...
       Display only the specified fields from the following set: type,
       name, used, quota.  The default is to display all fields.

   -p  Use exact (parsable) numeric output.

   -s field
       Sort output by this field. The -s and -S flags may be specified
       multiple times to sort first by one field, then by another. The
       default is -s type -s name.

   -t type[,type]...
       Print only the specified types from the following set: all,
       posixuser, smbuser, posixgroup, smbgroup.  The default is -t
       posixuser,smbuser.  The default can be changed to include group
       types.

 zfs groupspace [-Hinp] [-o field[,field]...] [-s field]... [-S field]...
   [-t type[,type]...] filesystem|snapshot
   Displays space consumed by, and quotas on, each group in the specified
   filesystem or snapshot. This subcommand is identical to zfs userspace,
   except that the default types to display are -t posixgroup,smbgroup.