Schnappschuss braucht unglaublich lange

V.Busch

Active Member
Oct 2, 2017
2
0
41
48
Hallo in die Runde,

wir haben hier einen ZFS-Server (48 Kerne, 386GB RAM, 2,8TB Disk) der unglaublich langsam die 50GB-VMs auf Basis von ZFS 0.8.3 und Proxmox 6.2 als Schnappschuss über die WebGUI sichert. Dieser Vorgang dauert länger als ein Backup und hängt die VMs auf! Auch kann man einen USB-Stick mit ext3 anschliessen und erhält nach dem Einhängen eine Schreibgeschwindigkeit im kb/s-Bereich. Ein
Code:
zfs snapshot rpool/data...
ist in Sekunden fertig. Ist habe dieses Problem nicht in den deutsch/englischen Foren hier gefunden, ist hierzu etwas bekannt?

Ein paar Daten:
Code:
pveperf
CPU BOGOMIPS:      316847.76
REGEX/SECOND:      4235517
HD SIZE:           1718.65 GB (rpool/ROOT/pve-1)
FSYNCS/SECOND:     2938.63
DNS EXT:           22.27 ms
DNS INT:           27.70 ms

Code:
zpool:
        NAME                              STATE     READ WRITE CKSUM
        rpool                             ONLINE       0     0     0
          raidz1-0                        ONLINE       0     0     0
            scsi-331402ec014a3c2e0-part3  ONLINE       0     0     0
            scsi-331402ec014a3c2e1-part3  ONLINE       0     0     0
            scsi-331402ec014a3c2e2-part3  ONLINE       0     0     0
        logs
          mirror-1                        ONLINE       0     0     0
            sdf1                          ONLINE       0     0     0
            sdg1                          ONLINE       0     0     0
        cache
          sdf2                            ONLINE       0     0     0
          sdg2                            ONLINE       0     0     0
        spares
          sde                             AVAIL


Code:
 zpool get all rpool
NAME   PROPERTY                       VALUE                          SOURCE
rpool  size                           2.72T                          -
rpool  capacity                       10%                            -
rpool  altroot                        -                              default
rpool  health                         ONLINE                         -
rpool  guid                           6960736932116184774            -
rpool  version                        -                              default
rpool  bootfs                         rpool/ROOT/pve-1               local
rpool  delegation                     on                             default
rpool  autoreplace                    off                            default
rpool  cachefile                      -                              default
rpool  failmode                       wait                           default
rpool  listsnapshots                  on                             local
rpool  autoexpand                     off                            default
rpool  dedupditto                     0                              default
rpool  dedupratio                     1.00x                          -
rpool  free                           2.43T                          -
rpool  allocated                      293G                           -
rpool  readonly                       off                            -
rpool  ashift                         12                             local
rpool  comment                        -                              default
rpool  expandsize                     -                              -
rpool  freeing                        0                              -
rpool  fragmentation                  4%                             -
rpool  leaked                         0                              -
rpool  multihost                      off                            default
rpool  checkpoint                     -                              -
rpool  load_guid                      15670006978822241637           -
rpool  autotrim                       off                            default
rpool  feature@async_destroy          enabled                        local
rpool  feature@empty_bpobj            active                         local
rpool  feature@lz4_compress           active                         local
rpool  feature@multi_vdev_crash_dump  enabled                        local
rpool  feature@spacemap_histogram     active                         local
rpool  feature@enabled_txg            active                         local
rpool  feature@hole_birth             active                         local
rpool  feature@extensible_dataset     active                         local
rpool  feature@embedded_data          active                         local
rpool  feature@bookmarks              enabled                        local
rpool  feature@filesystem_limits      enabled                        local
rpool  feature@large_blocks           enabled                        local
rpool  feature@large_dnode            enabled                        local
rpool  feature@sha512                 enabled                        local
rpool  feature@skein                  enabled                        local
rpool  feature@edonr                  enabled                        local
rpool  feature@userobj_accounting     active                         local
rpool  feature@encryption             enabled                        local
rpool  feature@project_quota          active                         local
rpool  feature@device_removal         enabled                        local
rpool  feature@obsolete_counts        enabled                        local
rpool  feature@zpool_checkpoint       enabled                        local
rpool  feature@spacemap_v2            active                         local
rpool  feature@allocation_classes     enabled                        local
rpool  feature@resilver_defer         enabled                        local
rpool  feature@bookmark_v2            enabled                        local

Code:
zfs get all rpool
NAME   PROPERTY              VALUE                  SOURCE
rpool  type                  filesystem             -
rpool  creation              Fri Jul 24 12:41 2020  -
rpool  used                  195G                   -
rpool  available             1.56T                  -
rpool  referenced            139K                   -
rpool  compressratio         1.50x                  -
rpool  mounted               no                     -
rpool  quota                 none                   default
rpool  reservation           none                   default
rpool  recordsize            128K                   default
rpool  mountpoint            /rpool                 default
rpool  sharenfs              off                    default
rpool  checksum              on                     default
rpool  compression           on                     local
rpool  atime                 off                    local
rpool  devices               on                     default
rpool  exec                  on                     default
rpool  setuid                on                     default
rpool  readonly              off                    default
rpool  zoned                 off                    default
rpool  snapdir               hidden                 default
rpool  aclinherit            restricted             default
rpool  createtxg             1                      -
rpool  canmount              on                     default
rpool  xattr                 on                     default
rpool  copies                1                      default
rpool  version               5                      -
rpool  utf8only              off                    -
rpool  normalization         none                   -
rpool  casesensitivity       sensitive              -
rpool  vscan                 off                    default
rpool  nbmand                off                    default
rpool  sharesmb              off                    default
rpool  refquota              none                   default
rpool  refreservation        none                   default
rpool  guid                  11884272414935173695   -
rpool  primarycache          all                    default
rpool  secondarycache        all                    default
rpool  usedbysnapshots       0B                     -
rpool  usedbydataset         139K                   -
rpool  usedbychildren        195G                   -
rpool  usedbyrefreservation  0B                     -
rpool  logbias               latency                default
rpool  objsetid              54                     -
rpool  dedup                 off                    default
rpool  mlslabel              none                   default
rpool  sync                  standard               local
rpool  dnodesize             legacy                 default
rpool  refcompressratio      1.00x                  -
rpool  written               0                      -
rpool  logicalused           265G                   -
rpool  logicalreferenced     46K                    -
rpool  volmode               default                default
rpool  filesystem_limit      none                   default
rpool  snapshot_limit        none                   default
rpool  filesystem_count      none                   default
rpool  snapshot_count        none                   default
rpool  snapdev               hidden                 default
rpool  acltype               off                    default
rpool  context               none                   default
rpool  fscontext             none                   default
rpool  defcontext            none                   default
rpool  rootcontext           none                   default
rpool  relatime              off                    default
rpool  redundant_metadata    all                    default
rpool  overlay               off                    default
rpool  encryption            off                    default
rpool  keylocation           none                   default
rpool  keyformat             none                   default
rpool  pbkdf2iters           0                      default
rpool  special_small_blocks  0                      default

Danke für eure Hilfe!
 
der unglaublich langsam die 50GB-VMs auf Basis von ZFS 0.8.3 und Proxmox 6.2 als Schnappschuss über die WebGUI sichert.
Bei default the snapshot on the GUI includes the memory of the VM. That can take a while to be written to the storage.
 

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