Making a SnapMirror Vault Tertiary Copy, Read-Write and Primary: Part 2 of 2: Clustershell Demonstration

Image: START and FINISH

How do we make Prod New the new production volume?

STEPS:

1) Modify Live Snapshot Policy with SnapMirror Labels for All Snapshots

2) Create new Live Snapshot Policy with extended retention

3) Modify Vault Policy with required labels for all SnapShots and Pre_Cutover label

4) Create new MirrorVault SnapMirror policy

5) Terminate client access: CIFS share delete, CIFS session check, volume unmount

6) Create Pre_Cutover Snapshot with Pre_Cutover label

7) Update DR, Break DR, verify DR has Snapshot Policy of none, Delete DR, Release DR

8) Update Vault, Delete Vault, Release Vault

9) Rename original Prod volume and offline

10) Update Mirror of Vault, break Mirror of Vault, set volume Snapshot policy, delete mirror of Vault, release mirror of Vault

11) Rename new Prod volume to original Prod volume name (remove _NEW)

12) Volume mount, CIFS share create, CIFS session check

13) Create DR with MirrorVault policy, resync DR

14) Verify SnapShot retention is working correctly

15) Delete Pre_Cutover Snapshot

16) Delete original Prod volume and SV volume

Clustershell Output:

This is going to be a bit long and my time is limited, so the Clustershell output comes with little explanation.

‌‌Volumes in play, their Snapshot Policy and Snapshot Count. Live Snapshot Policy. SnapMirrors and their type and policy. Vault snapmirror policy.

‌

cluster1::> volume show -volume VOL001* -fields snapshot-policy,snapshot-count

vserver volume snapshot-policy snapshot-count

------- ------ --------------- --------------

SVMA    VOL001 7_1min_8_7min   16

SVMA    VOL001_NEW none        104

SVMB    VOL001_DR none         17

SVMC    VOL001_SV none         104

cluster1::> snapshot policy show -policy  7_1min_8_7min

Vserver: cluster1

              Number of Is

Policy Name   Schedules Enabled Comment

------------- --------- ------- -------

7_1min_8_7min         2 true    -

    Schedule Count Prefix SnapMirror Label

    -------- ----- ------ ----------------

    1min         7 1min   1min

    7min         8 7min   7min

cluster1::> snapmirror show -fields type,policy,schedule

source-path destination-path type schedule policy

----------- ---------------- ---- -------- ------------------

SVMA:VOL001 SVMB:VOL001_DR   XDP  1min     MirrorAllSnapshots

SVMA:VOL001 SVMC:VOL001_SV   XDP  7min     104_7min

SVMC:VOL001_SV SVMA:VOL001_NEW XDP 5min    MirrorAllSnapshots

cluster1::> snapmirror policy show -policy 104_7min

Vserver  Policy   Policy Number         Transfer

Name     Name     Type   Of Rules Tries Priority Comment

-------  -------- ------ -------- ----- -------- -------

cluster1 104_7min vault         1     8  normal  -

  SnapMirror Label: 7min       Keep:     104

                         Total Keep:     104

1) Modify Live Snapshot Policy with SnapMirror Labels for All Snapshots:

(Don’t need to do as this is already so!)

2) Create new Live Snapshot Policy with extended retention:

cluster1::> snapshot policy create -policy 7_1min_104_7min -enabled true -schedule1 1min -count1 7 -snapmirror-label1 1min -schedule2 7min -count2 104 -snapmirror-label2 7min

cluster1::> snapshot policy show -policy 7_1min_104_7min

Vserver: cluster1

                Number of Is

Policy Name     Schedules Enabled Comment

--------------- --------- ------- -------

7_1min_104_7min         2 true    -

    Schedule Count Prefix SnapMirror Label

    -------- ----- ------ ----------------

    1min         7 1min   1min

    7min       104 7min   7min

3) Modify Vault Policy with required labels for all SnapShots and Pre_Cutover label:

cluster1::> snapmirror policy add-rule -policy 104_7min -snapmirror-label 1min -keep 7 -vserver cluster1

cluster1::> snapmirror policy add-rule -policy 104_7min -snapmirror-label pre_cutover -keep 1 -vserver cluster1

cluster1::> snapmirror policy show -policy 104_7min

Vserver Policy    Policy Number         Transfer

Name    Name      Type   Of Rules Tries Priority Comment

------- --------- ------ -------- ----- -------- -------

cluster1 104_7min vault         3     8  normal  -

  SnapMirror Label: 7min              Keep:     104

                    1min                          7

                    pre_cutover                   1

                                Total Keep:     112

4) Create new MirrorVault SnapMirror policy:

cluster1::> snapmirror policy create -policy 7_1min_8_7min -vserver cluster1 -type mirror-vault

cluster1::> snapmirror policy add-rule -policy 7_1min_8_7min -vserver cluster1 -snapmirror-label 1min -keep 7

cluster1::> snapmirror policy add-rule -policy 7_1min_8_7min -vserver cluster1 -snapmirror-label 7min -keep 8

cluster1::> snapmirror policy show -policy 7_1min_8_7min

Vserver Policy         Policy Number         Transfer

Name    Name           Type   Of Rules Tries Priority Comment

------- -------------- ------ -------- ----- -------- -------

cluster1 7_1min_8_7min mirror-vault  3     8  normal  -

  SnapMirror Label: sm_created       Keep:       1

                    1min                         7

                    7min                         8

                               Total Keep:      16

5) Terminate client access: CIFS share delete, CIFS session check, volume unmount:

cluster1::> cifs share show -volume VOL001 -instance

              Vserver: SVMA

                Share: VOL001

                 Path: /VOL001_CIFS_volume

     Share Properties: oplocks

                       browsable

                       changenotify

                       show-previous-versions

   Symlink Properties: symlinks

            Share ACL: Everyone / Full Control

          Volume Name: VOL001

        Offline Files: manual

Vscan File-Op Profile: standard

cluster1::> cifs share delete -vserver SVMA -share-name VOL001

cluster1::> vol unmount -vserver SVMA -volume VOL001

Image: Access to CIFS share is terminated!

6) Create Pre_Cutover Snapshot with Pre_Cutover label:

‌‌

cluster1::> vol snapshot create -vserver SVMA -volume VOL001 -snapshot pre_cutover -snapmirror-label pre_cutover

7) Update DR, Break DR, verify DR has Snapshot Policy of none, Delete DR, Release DR:

cluster1::> snapmirror update -destination-path SVMB:VOL001_DR

Operation is queued: snapmirror update of destination "SVMB:VOL001_DR".

cluster1::> snapmirror show -destination-path SVMB:VOL001_DR -fields status

source-path destination-path status

----------- ---------------- ------

SVMA:VOL001 SVMB:VOL001_DR   Idle

cluster1::> snapmirror break -destination-path SVMB:VOL001_DR

Operation succeeded: snapmirror break for destination "SVMB:VOL001_DR".

cluster1::> snapmirror delete -destination-path SVMB:VOL001_DR

Operation succeeded: snapmirror delete for the relationship with destination "SVMB:VOL001_DR".

cluster1::> snapmirror release -source-path SVMA:VOL001 -destination-path SVMB:VOL001_DR

[Job 168] Job succeeded: SnapMirror Release Succeeded

8) Update Vault, Delete Vault, Release Vault:

‌‌‌

cluster1::> snapmirror update -destination-path SVMC:VOL001_SV

Operation is queued: snapmirror update of destination "SVMC:VOL001_SV".

cluster1::> snapmirror show -destination-path SVMC:VOL001_SV -fields status

source-path destination-path status

----------- ---------------- ------

SVMA:VOL001 SVMC:VOL001_SV   Idle

cluster1::> snapmirror delete -destination-path SVMC:VOL001_SV

Operation succeeded: snapmirror delete for the relationship with destination "SVMC:VOL001_SV".

cluster1::> snapmirror release -source-path SVMA:VOL001 -destination-path SVMC:VOL001_SV

[Job 169] Job succeeded: SnapMirror Release Succeeded

9) Rename original Prod volume and offline:

cluster1::> volume rename -vserver SVMA -volume VOL001 -newname VOL001_OLD

[Job 170] Job succeeded: Successful

‌

cluster1::> vol offline  -vserver SVMA -volume VOL001_OLD

Volume "SVMA:VOL001_OLD" is now offline.

10) Update Mirror of Vault, break Mirror of Vault, set volume Snapshot policy, delete mirror of Vault, release mirror of Vault:

cluster1::> snapmirror update -destination-path SVMA:VOL001_NEW

Operation is queued: snapmirror update of destination "SVMA:VOL001_NEW".

cluster1::> snapmirror show -destination-path SVMA:VOL001_NEW -fields status

source-path    destination-path status

-------------- ---------------- ------

SVMC:VOL001_SV SVMA:VOL001_NEW  Idle

cluster1::> snapmirror break -destination-path SVMA:VOL001_NEW

Operation succeeded: snapmirror break for destination "SVMA:VOL001_NEW".

cluster1::> volume modify -vserver SVMA -volume VOL001_NEW -snapshot-policy 7_1min_104_7min

Volume modify successful on volume VOL001_NEW of Vserver SVMA.

cluster1::> snapmirror delete -destination-path SVMA:VOL001_NEW

Operation succeeded: snapmirror delete for the relationship with destination "SVMA:VOL001_NEW".

cluster1::> snapmirror release -source-path SVMC:VOL001_SV -destination-path SVMA:VOL001_NEW

[Job 171] Job succeeded: SnapMirror Release Succeeded

11) Rename new Prod volume to original Prod volume name (remove _NEW)

cluster1::> vol rename -vserver SVMA -volume VOL001_NEW -newname VOL001

[Job 172] Job succeeded: Successful

12) Volume mount, CIFS share create, CIFS session check:

cluster1::> vol mount -vserver SVMA -volume VOL001 -junction-path /VOL001

cluster1::> cifs share create -vserver SVMA -share-name VOL001 -path /VOL001 -share-properties oplocks,browsable,changenotify,show-previous-versions -symlink-properties symlinks -offline-files manual -vscan-fileop-profile standard

Image: Access to CIFS share is restored!

13) Create DR with MirrorVault policy, resync DR:

cluster1::> snapmirror create -source-path SVMA:VOL001 -destination-path SVMB:VOL001_DR -type XDP -policy 7_1min_8_7min -schedule 1min

Operation succeeded: snapmirror create for the relationship with destination "SVMB:VOL001_DR".

cluster1::> snapmirror resync -destination-path SVMB:VOL001_DR

Warning: All data newer than Snapshot copy 7min.2019-07-25_1021 on volume SVMB:VOL001_DR will be deleted.

Do you want to continue? {y|n}: y

Operation is queued: initiate snapmirror resync to destination "SVMB:VOL001_DR".

cluster1::> snapmirror show -destination-path SVMB:VOL001_DR -field state,status,health

source-path destination-path state        status healthy

----------- ---------------- ------------ ------ -------

SVMA:VOL001 SVMB:VOL001_DR   Snapmirrored Idle   true

14) Verify SnapShot retention is working correctly:

cluster1::> snapshot show -volume VOL001 -snapshot 1min.*

...

7 entries were displayed.

cluster1::> snapshot show -volume VOL001 -snapshot 7min.*

...

104 entries were displayed.

cluster1::> snapshot show -volume VOL001_DR -snapshot 1min.*

...

7 entries were displayed.

cluster1::> snapshot show -volume VOL001_DR -snapshot 7min.*

...

8 entries were displayed.

15) Delete Pre_Cutover Snapshot:

cluster1::> snapshot delete -vserver SVMA -volume VOL001 -snapshot pre_cutover

cluster1::> snapshot delete -vserver SVMB -volume VOL001_DR -snapshot pre_cutover

16) Delete original Prod volume and SV volume:

cluster1::> volume delete -vserver SVMA -volume VOL001_OLD

 [Job 174] Job succeeded: Successful

cluster1::> volume offline -vserver SVMC -volume VOL001_SV

Volume "SVMC:VOL001_SV" is now offline.

cluster1::> volume delete -vserver SVMC -volume VOL001_SV

 [Job 176] Job succeeded: Successful

THE END!

Final check:

cluster1::> volume show -volume VOL001* -fields snapshot-policy,snapshot-count

vserver volume snapshot-policy snapshot-count

------- ------ --------------- --------------

SVMA    VOL001 7_1min_104_7min 112

SVMB    VOL001_DR none         17

2 entries were displayed.

cluster1::> snapmirror show -fields type,policy,schedule

source-path destination-path type schedule policy

----------- ---------------- ---- -------- -------------

SVMA:VOL001 SVMB:VOL001_DR   XDP  1min     7_1min_8_7min