Details
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Type:
Bug
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Status: Resolved
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Priority:
Minor
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: Lustre 2.11.0, Lustre 2.10.7
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Labels:None
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Severity:3
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Rank (Obsolete):9223372036854775807
Description
When there are several requests inflight a server may grant a client with more grants than it requests.
In real environment it has been reported that clients were granted ~800mb while max_dirty_mb set to 256.
$ cat compute_clients_cur_grant_bytes.txt | grep OST019c | awk -F= 'BEGIN \{ grants=0 } \{ if (grants < $2) grants = $2 } END \{ print grants }'
805306368
In total clients were granted ~960gb
$ cat compute_clients_cur_grant_bytes.txt | grep OST019c | awk -F= '{ grants += $2 } END { print grants }'
971171270656
That resulted in ENOSPC condition when osts had about 1tb of free space.
Attachments
Issue Links
- is related to
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LU-8708 Grant shrinking disabled all the time
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- Resolved
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