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What is Consistency Point..? How its differ from Snapshot

http://netappnotesark.blogspot.in/2015/08/index_12.html

 

What is Consistency Point..? How its differ from Snapshot..?

 Consistency Point: A CP is triggered whenever the Filesystem reaches a point where it wants to update the physical data on the disks, with whatever has accumulated in Cache (and was journaled in NVRAM).

Snapshot: A SnapShot is created whenever the snap-schedule is configured to trigger it or any other operation (SnapManager, SnapDrive, SnapMirror, SnapVault, Administrator) creates a new SnapShot. Creating a SnapShot also triggers a CP, because the SnapShot is ALWAYS a CONSISTENT IMAGE fo the Filesystem at this point in time

 

3 comments:

  1. UnknownAugust 19, 2015 at 8:28 AM

    Cp is for ontap os

    And snapshot is for user data an things on top on os

    ReplyDelete
  2. UnknownAugust 19, 2015 at 8:36 AM

    Cp is the point I. Time data of nvram
    Tht help to restore the system if it fails
    Snapshot is for volumes and aggregates
    Where data is visible to users
    Cp data is internal to os nd cannot be accesed
    This is accessed only by os

    ReplyDelete
  3. Ankam Ravi KumarAugust 20, 2015 at 5:49 AM

    Consistency Point: a CP is triggered whenever the Filesystem reaches a point where it wants to update the physical data on the disks, with whatever has accumulated in Cache (and was journaled in NVRAM).

    Snapshot: a SnapShot is created whenever the snap-schedule is configured to trigger it or any other operation (SnapManager, SnapDrive, SnapMirror, SnapVault, Administrator) creates a new SnapShot. Creating a SnapShot also triggers a CP, because the SnapShot is ALWAYS a CONSISTENT IMAGE fo the Filesystem at this point in time

    ReplyDelete