685e4c98ee
The maximum amount of shared (deduplicated, cloned) data on a Data ONTAP FlexVol (i.e. a Cinder pool) is 640TB. The only thing more surprising about that number is that we have customers hitting it. The symptom is that operations such as cloning Cinder volumes fail because no more blocks may be shared. The fix is to report the level of consumption to the scheduler for optional incorporation into the filter & goodness functions, so that pools nearing the shared block limit may be shielded from further provisioning requests. Implements: blueprint netapp-cdot-report-shared-blocks-exhaustion Change-Id: I01b7322f7ddb05ee5e28bcb1121a90a6ea307720
10 lines
338 B
YAML
10 lines
338 B
YAML
---
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features:
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- The NetApp cDOT drivers report to the scheduler,
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for each FlexVol pool, the fraction of the shared
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block limit that has been consumed by dedupe and
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cloning operations. This value, netapp_dedupe_used_percent,
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may be used in the filter & goodness functions for better
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placement of new Cinder volumes.
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