HP 3PAR virtual copy provides Point-In-Time thin-aware copy
of base volume.
As part of the virtual copy process, HP 3PAR software uses allocate-on-write
(or redirect-on-write) method which freezes the base volume and writes all new
data on other disks (virtual copy disk).
You can create Virtual copies of fully provisioned VV, Thin
Provisioned VV or of the virtual copy itself.
There are multiple use cases for the virtual copy, for
example, integration with enterprise-level backup technologies, application
recovery etc… Backup software vendors like Veeam, Symantec, HP, Commvault developed
backup software’s by integrating HP storeServe virtual copy/ snapshot
technology.
3PAR virtual copy feature is provided through “HP 3PAR
Virtual Copy Software” license and it can take up to 500 PIT copies of the base
volume without impacting applications, up to 256 of which can be read-write
copies.
Step by step
instructions to create 3PAR virtual volume:
·
Make sure that your 3PAR system is licensed for
Virtual Copy feature
(HP 3PAR License check)
·
In HP 3PAR console and navigate to Provisioning
and select Virtual Volumes in the left pane.
·
In the right pane, you see all virtual volumes
created on 3PAR array
·
Select the virtual volume for which you need
virtual copy and select "Create Virtual Volume"
Check parent volume and select destination volume naming
convention. There are 3 types of naming convention available, so select
whatever makes sense to your organisation and the way you plan your snapshots.
·
Volume name followed by the timestamp
(@vvname@.@y@@m@@d@@H@@M@@s@)
·
Volume name followed by the current count of VVs
created (@@vvname@.@yCount@)
·
Volume name followed by count in seconds since
the epoch (@vvname@.@s@)
· User-defined
In this example, I have selected
default option i.e. Volume name followed by the timestamp
(@vvname@.@y@@m@@d@@H@@M@@s@)
Then select whether it’s Read-only or Read/Write copy. The default option is Read/Write.
HP’s explanation on Read/Write copy is “Read/ Write: Select access permissions for the snapshot. To prevent
modification of this snapshot, select Read Only. To allow modifications to this
snapshot or to use it to restore data on a different host, select read/ write
Note that snapshots
must alternate permissions, so if the snapshot has the same access permissions
as the parent volume, the system creates two snapshot (e.g. RO>RW >RO)”
Then select show advanced options if you want to configure
retention and expiration times. Be careful with a retention time as the system won’t
allow you to delete virtual copy until retention time finishes.
Generally, we use expiration time, a week or a month or a
year.
Select “Create Schedule” in the above screenshot if you want to schedule
creating virtual copies to a particular base volume.
Please share on social media if you found this post
helpful. If you have a comment or question, please post and add your voice to
the conversation.
Hi Sir,
ReplyDeleteCan you please explain details "Destination Name" with 3 type of naming convention
If the snapshot has the same access permissions as the parent volume ,the system showing two snapshot
ReplyDelete?
Can you please explain in detail
Thank you for this
ReplyDeleteJust one question - I am struggling to get extra volumes listed as Parent volumes, how do you get them as parent volumes?
I found the way to do it - you need to set the copy cpg and then it will work
Delete