Solved

netapp snapshot

Posted on 2014-09-22
3
224 Views
Last Modified: 2014-10-12
Is there any reason why the old snapshot grow.
I understand that last snapshot grow when there is an activities on the lun.
See the lis below. The snap14 was on 50% testerday and today it went up to 51%.

  %/used       %/total  date          name
----------  ----------  ------------  --------
  3% ( 3%)    1% ( 1%)        sanp1
  3% ( 0%)    1% ( 0%)  
  3% ( 0%)    1% ( 0%)  
 14% (12%)    7% ( 6%)  
47% (13%)   39% ( 6%)  
 50% (10%)   44% ( 5%)  
 51% ( 1%)   44% ( 0%)          snap13
 51% ( 0%)   44% ( 0%)           snap14
0
Comment
Question by:sara2000
  • 2
3 Comments
 
LVL 42

Accepted Solution

by:
paulsolov earned 500 total points
ID: 40337590
The oldest snapshot will grow since they're holding onto block that are changing.  The old the snapshot the more blocks it hold that have changed thus the larger it gets
0
 

Author Comment

by:sara2000
ID: 40340538
My understanding is this. When you take the snapshot the block is locked and it is only a read-only.
snapshot is pointing to that block and if there is any change on the data in that block then the change of data will be written in an another block.
Are you saying that the change of data will be written on the same block because of this the snapshot size is increasing?
0
 
LVL 42

Expert Comment

by:paulsolov
ID: 40376168
Let me clarify.  Let's say you have a snapshot and you delete files/blocks as data changes over time.  This old data is still locked in the old snapshot so that the more things changed from the time you took the snapshot the larger it will get.  Say you have log file for a sql server, You take a snapshot, flush the log.  At this time the old log is still sitting in a snapshot until the snapshot is deleted.
0

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
NetApp space reclaim 3 39
Repairing a physically broken flash drive 4 73
Win 10...Some user folders missing location tab 7 138
Linux kernel panic ext3-fs error 14 22
Each year, investment in cloud platforms grows more than 20% (https://www.immun.io/hubfs/Immunio_2016/Content/Marketing/Cloud-Security-Report-2016.pdf?submissionGuid=a8d80a00-6fee-4b85-81db-a4e28f681762) as an increasing number of companies begin to…
The business world is becoming increasingly integrated with tech. It’s not just for a select few anymore — but what about if you have a small business? It may be easier than you think to integrate technology into your small business, and it’s likely…
This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …
This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…

713 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question