[metrics-bugs] #32660 [Metrics/Onionoo]: onionoo-backend is killing the ganeti cluster

[Tor Bug Tracker & Wiki]

#32660: onionoo-backend is killing the ganeti cluster
-----------------------------+------------------------------
 Reporter:  anarcat          |          Owner:  metrics-team
     Type:  defect           |         Status:  merge_ready
 Priority:  Medium           |      Milestone:
Component:  Metrics/Onionoo  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:                   |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:                   |        Sponsor:
-----------------------------+------------------------------
Changes (by irl):

 * status:  needs_review => merge_ready


Comment:

 Replying to [comment:10 anarcat]:
 > before we start doing optimization tradeoffs, especially ones involving
 more CPU time, I think we should  diagnose the problem further. running
 checksums can take a while and might impose extra load on the server...
 couldn't we use timestamps or some faster mechanism?

 I don't know enough about XFS to know if filesystem attributes can be
 trusted.

 Replying to [comment:9 karsten]:
 > irl, please review
 [https://gitweb.torproject.org/user/karsten/onionoo.git/commit/?h=task-32660&id=4b7b13d37d2423f9b1dee865e203a524b8df488b
 commit 4b7b13d in my task-32660 branch].

 The change looks good if we decide we want to go this route. The JVM
 should use the Intel SHA extensions on recent processors, I don't think
 that we're going to see a huge increase in CPU load.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32660#comment:11>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online