GCE : Snapshot restore vs Disk Image
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Will restoring a snapshot recreate the environment EXACTLY as it was at the point of the snapshot? I am specifically referring to the operating system and installed software.
If not, then I assume that a disk image is a correct approach
google-cloud-platform edited Nov 18 at 23:41
MasOOd.KamYab
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asked Nov 18 at 8:45
David Silverman
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Will restoring a snapshot recreate the environment EXACTLY as it was at the point of the snapshot? I am specifically referring to the operating system and installed software.
If not, then I assume that a disk image is a correct approach
google-cloud-platform edited Nov 18 at 23:41
MasOOd.KamYab
527313
asked Nov 18 at 8:45
David Silverman
1
New contributor
David Silverman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
Will restoring a snapshot recreate the environment EXACTLY as it was at the point of the snapshot? I am specifically referring to the operating system and installed software.
If not, then I assume that a disk image is a correct approach
google-cloud-platform edited Nov 18 at 23:41
MasOOd.KamYab
527313
asked Nov 18 at 8:45
David Silverman
1
New contributor
David Silverman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Will restoring a snapshot recreate the environment EXACTLY as it was at the point of the snapshot? I am specifically referring to the operating system and installed software.
If not, then I assume that a disk image is a correct approach
google-cloud-platform google-cloud-platform edited Nov 18 at 23:41
MasOOd.KamYab
527313
asked Nov 18 at 8:45
David Silverman
1
New contributor
David Silverman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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edited Nov 18 at 23:41
MasOOd.KamYab
527313
asked Nov 18 at 8:45
David Silverman
1
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David Silverman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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edited Nov 18 at 23:41
MasOOd.KamYab
527313
edited Nov 18 at 23:41
MasOOd.KamYab
527313
edited Nov 18 at 23:41
MasOOd.KamYab
527313
527313
asked Nov 18 at 8:45
David Silverman
1
New contributor
David Silverman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Nov 18 at 8:45
David Silverman
1
asked Nov 18 at 8:45
David Silverman
1
1
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David Silverman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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New contributor
David Silverman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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David Silverman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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1 Answer
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Snapshot and Disk Image use the same process. Both take a point in time copy of a storage device by performing a block copy.
Will either restore exactly (bit-for-bit) as the source? Yes, if you shutdown the VM instance. Maybe if you do not. Google (and AWS, Azure, etc.) strongly recommend that you shutdown your VM before these types of operations. The reason is that file system data could be cached in memory that has not been flushed to disk. A snaphot requires that all applications and the OS participate in the snaphost process. Few applications do.
answered Nov 18 at 9:24
John Hanley
11.1k2527
Tx v much. I am processing windows updates and need a rollback point in case there are issues with the patches
– David Silverman
Nov 20 at 4:42
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
Snapshot and Disk Image use the same process. Both take a point in time copy of a storage device by performing a block copy.
Will either restore exactly (bit-for-bit) as the source? Yes, if you shutdown the VM instance. Maybe if you do not. Google (and AWS, Azure, etc.) strongly recommend that you shutdown your VM before these types of operations. The reason is that file system data could be cached in memory that has not been flushed to disk. A snaphot requires that all applications and the OS participate in the snaphost process. Few applications do.
answered Nov 18 at 9:24
John Hanley
11.1k2527
Tx v much. I am processing windows updates and need a rollback point in case there are issues with the patches
– David Silverman
Nov 20 at 4:42
add a comment |
up vote
1
down vote
Snapshot and Disk Image use the same process. Both take a point in time copy of a storage device by performing a block copy.
Will either restore exactly (bit-for-bit) as the source? Yes, if you shutdown the VM instance. Maybe if you do not. Google (and AWS, Azure, etc.) strongly recommend that you shutdown your VM before these types of operations. The reason is that file system data could be cached in memory that has not been flushed to disk. A snaphot requires that all applications and the OS participate in the snaphost process. Few applications do.
answered Nov 18 at 9:24
John Hanley
11.1k2527
Tx v much. I am processing windows updates and need a rollback point in case there are issues with the patches
– David Silverman
Nov 20 at 4:42
add a comment |
up vote
1
down vote
up vote
1
down vote
Snapshot and Disk Image use the same process. Both take a point in time copy of a storage device by performing a block copy.
Will either restore exactly (bit-for-bit) as the source? Yes, if you shutdown the VM instance. Maybe if you do not. Google (and AWS, Azure, etc.) strongly recommend that you shutdown your VM before these types of operations. The reason is that file system data could be cached in memory that has not been flushed to disk. A snaphot requires that all applications and the OS participate in the snaphost process. Few applications do.
answered Nov 18 at 9:24
John Hanley
11.1k2527
Snapshot and Disk Image use the same process. Both take a point in time copy of a storage device by performing a block copy.
Will either restore exactly (bit-for-bit) as the source? Yes, if you shutdown the VM instance. Maybe if you do not. Google (and AWS, Azure, etc.) strongly recommend that you shutdown your VM before these types of operations. The reason is that file system data could be cached in memory that has not been flushed to disk. A snaphot requires that all applications and the OS participate in the snaphost process. Few applications do.
answered Nov 18 at 9:24
John Hanley
11.1k2527
answered Nov 18 at 9:24
John Hanley
11.1k2527
answered Nov 18 at 9:24
John Hanley
11.1k2527
answered Nov 18 at 9:24
John Hanley
11.1k2527
11.1k2527
Tx v much. I am processing windows updates and need a rollback point in case there are issues with the patches
– David Silverman
Nov 20 at 4:42
add a comment |
Tx v much. I am processing windows updates and need a rollback point in case there are issues with the patches
– David Silverman
Nov 20 at 4:42
Tx v much. I am processing windows updates and need a rollback point in case there are issues with the patches
– David Silverman
Nov 20 at 4:42
Tx v much. I am processing windows updates and need a rollback point in case there are issues with the patches
– David Silverman
Nov 20 at 4:42
add a comment |
David Silverman is a new contributor. Be nice, and check out our Code of Conduct.
David Silverman is a new contributor. Be nice, and check out our Code of Conduct.
David Silverman is a new contributor. Be nice, and check out our Code of Conduct.
David Silverman is a new contributor. Be nice, and check out our Code of Conduct.
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