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652
December 20th, 2022 22:00
ME5024 snapshot Question
ME5024 snapshots are created daily and scheduled for 7 archiving.
I'm curious about the snapshot capacity display.
It looks the same as the original volume, but is it correct that the snapshot capacity takes up to the same amount?
Or does it only take up as much as Unique Data?
# show volumes
Pool Name Total Size Alloc Size Class Type Health Reason Action
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A Host_Window_Volume 25.9TB 4770.1GB 가상 밑수 확인
A snapshot__S0013 25.9TB 4617.4GB 가상 스냅숏 확인
A snapshot__S0014 25.9TB 4755.1GB 가상 스냅숏 확인
A snapshot__S0015 25.9TB 4759.1GB 가상 스냅숏 확인
A snapshot__S0016 25.9TB 4762.7GB 가상 스냅숏 확인
A snapshot__S0017 25.9TB 4767.8GB 가상 스냅숏 확인
A snapshot__S0018 25.9TB 4768.6GB 가상 스냅숏 확인
A snapshot__S0019 25.9TB 4770.0GB 가상 스냅숏 확인
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# show snapshots
Pool Name Creation Date/Time Status Status-Reason Parent Volume Base Vol Snaps TreeSnaps Snap-Pool Snap Data Unique Data Shared Data Retention Priority
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A snapshot__S0015 2022-12-02 08:01:11 사용 가능 해당 없음 Host_Window_Volume Host_Window_Volume 0 8 N/A 4759.1GB 6463.4MB 4752.6GB 보통
A snapshot__S0016 2022-12-03 08:01:09 사용 가능 해당 없음 Host_Window_Volume Host_Window_Volume 0 8 N/A 4762.7GB 4085.2MB 4758.6GB 보통
A snapshot__S0017 2022-12-04 08:01:09 사용 가능 해당 없음 Host_Window_Volume Host_Window_Volume 0 8 N/A 4767.8GB 3351.2MB 4764.5GB 보통
A snapshot__S0018 2022-12-05 08:01:10 사용 가능 해당 없음 Host_Window_Volume Host_Window_Volume 0 8 N/A 4768.6GB 3800.0MB 4764.8GB 보통
A snapshot__S0019 2022-12-06 08:01:12 사용 가능 해당 없음 Host_Window_Volume Host_Window_Volume 0 8 N/A 4770.0GB 3053.4MB 4766.9GB 보통
A snapshot__S0013 2022-12-07 08:01:13 사용 가능 해당 없음 Host_Window_Volume Host_Window_Volume 0 8 N/A 4617.4GB 41.4GB 4576.0GB 보통
A snapshot__S0014 2022-12-08 08:01:12 사용 가능 해당 없음 Host_Window_Volume Host_Window_Volume 0 8 N/A 4755.1GB 7348.4MB 4747.7GB 보통
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DELL-Erman O
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December 22nd, 2022 00:00
Hi, thanks for information. Maybe this note on equalogic might be helpful. I couldn't find a similar explanation directly in the ME5 documentation. "Note: Snapshot reserve, local replication reserve, and replica reserve for a volume are all based on the current volume reserve, not the reported volume size." https://dell.to/3jpCMWF;
You can also take a look at the "set snapshot-space" and "show snapshot-space" commands here. https://dell.to/3G8Wq1V
DELL-Erman O
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December 21st, 2022 03:00
Hi, it seems normal to me. Please check "Setting up snapshot space management in the context of replication" pg 42 https://dell.to/3v8uDYZ;
Hope that helps!
YJKIM-ESP
2 Posts
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December 21st, 2022 21:00
Thank you for your answer.
What I'm curious about is that when the volume usage is 4TB, the snapshot usage seems to be the same, so I'm wondering.
In the figure, Volume usage is 4.7 TB, and there are 7 snapshots of similar capacity, so it seems to be using 33.2 TB.
Based on the pool, 4.7TB + 33.2TB, is a total of 37.9TB being used?
The total usage of the pool is 32.5 TB, which exceeds the capacity.