May 24, 2016 at 10:10 pm
Good question on an undocumented(?) command, thanks.
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May 24, 2016 at 11:57 pm
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May 25, 2016 at 12:55 am
Good to know!
😀
May 25, 2016 at 3:50 am
use at your peril I guess?
Are these the commands used by hardware based backup solutions?
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May 25, 2016 at 5:41 am
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May 25, 2016 at 6:24 am
Never knew of it. Thanks, Steve for sharing.
May 25, 2016 at 6:31 am
When was this introduced? We're on 2008R2. Is there "documentation" somewhere of the undocumented DBCC commands for 2008R2?
May 25, 2016 at 7:01 am
My first question of the day, yahoo.
May 25, 2016 at 8:58 am
HappyGeek (5/24/2016)
Good question on an undocumented(?) command, thanks.
Yes, undocumented
May 25, 2016 at 8:59 am
george sibbald (5/25/2016)
use at your peril I guess?Are these the commands used by hardware based backup solutions?
don't think so. Those use the VDI interface, which doesn't freeze IO, but rather allows the product capture log records for changes.
May 25, 2016 at 8:59 am
George Vobr (5/25/2016)
Never knew of it. Thanks, Steve for sharing.
Me, either. It was a surprise to read about it and try it.
May 25, 2016 at 9:08 am
Steve Jones - SSC Editor (5/25/2016)
george sibbald (5/25/2016)
use at your peril I guess?Are these the commands used by hardware based backup solutions?
don't think so. Those use the VDI interface, which doesn't freeze IO, but rather allows the product capture log records for changes.
Looking at the server logs, we see messages identical to those created when SnapManager does its thing. Well, mostly. The Thaw message is the same but, for some reason, I'm not seeing anything in my playpit's server log for a Freeze. Hmm.
Thomas Rushton
blog: https://thelonedba.wordpress.com
May 25, 2016 at 10:13 am
Ah, snaps are different. That's not a backup (usually), but a copy of the disk at a point in time. It should use the freeze to mark a stamp (somehow) that lets them copy blocks on write. They otherwise just copy blocks, but writes get priority for duplication.
May 25, 2016 at 12:18 pm
Interesting...
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