Email Subscription Notifications Suspended Temporarily
We are in the process of making navigation in the Servers and Operating Systems forums simpler and more direct. While doing this, we have to temporarily suspend email notifications for subscriptions. If you are subscribed to one or more discussion boards or blogs in the community, please check them daily to see new content. Notifications will be turned back on in a few days. We apologize for any inconvenience this may cause. Thanks, Warren_Admin
Disk Enclosures
cancel
Showing results for 
Search instead for 
Did you mean: 

EVA 4000 snapshot allocation behaviour

SOLVED
Go to solution
Maxitaly_1
Advisor

EVA 4000 snapshot allocation behaviour

Hi all
Configuration:
- EVA4000 2C2D (21 disk 146 HPFC total)
- XCS 5.100
- 1 disk group

I've created in 3 different days 3 snapshot (not allocated)
for a vdisk (200 GB vraid5): snap1, snap2, snap3 (snap3 is the oldest).
The vdisk is presented to a Windows 2003 server SP1.
Verifying the space allocated for each snapshot I found this values:
snap1:
allocatedcapacity ....................: 37
allocatedcapacityblocks ..............: 77709312
snap2:
allocatedcapacity ....................: 46
allocatedcapacityblocks ..............: 98074624
snap3:
allocatedcapacity ....................: 5
allocatedcapacityblocks ..............: 12419072

The day after (snap3 deleted, snap2 renamed to snap3, snap1 renamed to snap2,
snap1 new snapshot):
snap1:
allocatedcapacity ....................: 1
allocatedcapacityblocks ..............: 2473984
snap2:
allocatedcapacity ....................: 47
allocatedcapacityblocks ..............: 98664448
snap3:
allocatedcapacity ....................: 46
allocatedcapacityblocks ..............: 98074624

Is this behaviour correct ?
It's possible that the oldest one is smaller ?

Thanks
Armando

3 REPLIES
Maxitaly_1
Advisor

Re: EVA 4000 snapshot allocation behaviour

Hi
nobody has never seen this behaviour ?

Thanks
The Spartan
Trusted Contributor
Solution

Re: EVA 4000 snapshot allocation behaviour

Is this behaviour correct ?
Yes

The size of the snapshot is a function of the status of the data at the time of snapshot and not a function of time.

If you are keen to win, you should be willing to lose.
GZito
Occasional Visitor

Re: EVA 4000 snapshot allocation behaviour

Armando,

I'm running 3 snapshots against a vdisk and I expect the old one to be the biggest, but it's not the case.
So basically I'm experiencing the same behaviour you have

EVA 6000 VCS 5.031, using RSM 2 to create Snapshots

Is there anyone that could give us a correct answer ?

Thanks
Giuseppe