Commit Graph

7 Commits

Author SHA1 Message Date
Cameron
38f94c1c29 satellite/reputation: if node is DQd or exited skip applying audit
If a node is already disqualified or exited, don't bother going through
the audit reputation code. If there's an additional reputation update to
be made based on the automatic offline audit these nodes would get, the
overlay DB rejects it anyway.

Change-Id: I48ba151aa640b32f87e1285521be465d1f692a78
2023-02-21 18:31:21 +00:00
paul cannon
0dcc0a9ee0 satellite/reputation: reconfigure lambda and alpha
This is in response to community feedback that our existing reputation
calculation is too likely to disqualify storage nodes unfairly with
extreme swings up and down.

For details and analysis, please see the data_loss_vs_dq_chance_sim.py
tool, the "tuning reputation further.ipynb" Jupyter notebook in the
storj/datascience repository, and the discussion at

    https://forum.storj.io/t/tuning-audit-scoring/14084

In brief: changing the lambda and initial-alpha parameters in this way
causes the swings in reputation to be smaller and less likely to put a
node past the disqualification threshold unfairly.

Note: this change will cause a one-time reset of all (non-disqualified)
node reputations, because the new initial alpha value of 1000 is
dramatically different, and the disqualification threshold is going to
be much higher.

Change-Id: Id6dc4ba8fde1be3db4255b72282207bab5491ca3
2022-08-17 18:52:53 +00:00
paul cannon
737d7c7dfc satellite/reputation: new ApplyUpdates() method
The ApplyUpdates() method on the reputation.DB interface acts like the
similar Update() method, but can allow for applying the changes from
multiple audit events, instead of only one.

This will be necessary for the reputation write cache, which will batch
up changes to each node's reputation in order to flush them
periodically.

Refs: https://github.com/storj/storj/issues/4601

Change-Id: I44cc47767ea2d9423166bb8fed080c8a11182041
2022-06-07 15:22:25 +00:00
Yaroslav Vorobiov
4223fa01f8 satellite/reputation: add disqualification reason for status update
Set disqualification reason when reputations stats are updated on DB.Update.
Added tests for DisqualifyNode and for disqualification cases which happens during Update.

Change-Id: I00130ab5d9722422805159ad2f183c205de60f7e
2022-04-20 13:29:10 +00:00
Yingrong Zhao
1f8f7ebf06 satellite/{audit, reputation}: fix potential nodes reputation status
inconsistency

The original design had a flaw which can potentially cause discrepancy
for nodes reputation status between reputations table and nodes table.
In the event of a failure(network issue, db failure, satellite failure, etc.)
happens between update to reputations table and update to nodes table, data
can be out of sync.
This PR tries to fix above issue by passing through node's reputation from
the beginning of an audit/repair(this data is from nodes table) to the next
update in reputation service. If the updated reputation status from the service
is different from the existing node status, the service will try to update nodes
table. In the case of a failure, the service will be able to try update nodes
table again since it can see the discrepancy of the data. This will allow
both tables to be in-sync eventually.

Change-Id: Ic22130b4503a594b7177237b18f7e68305c2f122
2022-01-06 21:05:59 +00:00
Yingrong Zhao
ae02f6deda satellite/reputation: return default reputation stats when node is not
found

Change-Id: I587d0ab36ffa0efaf345a6a6e221ae5d2068e1c5
2021-08-04 19:34:54 +00:00
Yingrong Zhao
646ce5b8cc satellite/overlay: remove reputation logic from overlay
Change-Id: I3492860e4537c7a8e4e824ec4c9c8d179134a0c0
2021-07-28 15:15:28 -04:00