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March 12th, 2012 05:00
Whats difference between total_savvol_used and ckpt_usage_on_savvol?
I'm curious what the difference is between the total_savvol_used and chkpt_usage_on_savvol when issuing a fs_ckpt -l -all.
Here is output for my filesystem in question. Is this a problem because savvol_used is 89% or is it not because the chkpt_usage is only 72% and 17% respectively,
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id ckpt_name creation_time inuse fullmark total_savvol_used ckpt_usage_on_savvol
86 root_rep_ckpt_79_116324_ 02/14/2012-09:55:18-EST y 90% 89% 72%
87 root_rep_ckpt_79_116324_ 02/14/2012-09:55:25-EST y 90% 89% 17%
Info 26306752329: The value of ckpt_usage_on_savvol for read-only checkpoints may not be consistent with the total_savvol_used.
id wckpt_name inuse fullmark total_savvol_used base ckpt_usage_on_savvol
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I'm just trying to diagnose a this message which happened twice in march (March 1, 1:06 PM and March 8 1:06 PM)
| Deduplication of file system id 79 was aborted after 10 failure(s), 1636845576 KB available on FS. Last reported error was: SavVolAtCapacity. |
SAMEERK1
296 Posts
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March 12th, 2012 05:00
as the terms say, total usage of savvol means the overall savvol used for a particular file system
and the ckpt usage on savvol means, the amount of space occupied by a single checkpoint on the savvol
the article emc229138 should help you understand the error message.
DHoffman2
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March 15th, 2012 10:00
I see this all the time when I enable dedupe on a large file system. It will eventually stop once the dedupe has finished. From what I have gathered, the dedupe process consumes space in the SAVVOL. The same savvol that checkpoints are kept in. So as old checkpoints are dropped off more space is freed up. For a while I was watching this daily and would start the dedup process again manually (though I forget the command. Something to do with dedupe -suspend and then a dedupe -resume... something along those lines) once I saw enough free space in the savvol.
Hope this helps shed some light.