openstack
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openstack
Code Issues Proposed changes

Update git submodules 

* Update swift from branch 'master'
  to a2952962d2f451d63b482646e23f515be9b00b86
  - Merge "proxy: Reduce round-trips to memcache and backend on info misses"
  - proxy: Reduce round-trips to memcache and backend on info misses
    
    Following a memcache restart in a SAIO, I've seen the following happen
    during an object HEAD:
    
    - etag_quoter wants to get account/container info to decide whether to
      quote-wrap or not
    - account info is a cache miss, so we make a no-auth'ed HEAD to the next
      filter in the pipeline
    - eventually this gets down to ratelimit, which *also* wants to get
      account info
    - still a cache miss, so we make a *separate* HEAD that eventually talks
      to the backend and populates cache
    - ratelimit realizes it can't ratelimit the request and lets the
      original HEAD through to the backend
    
    There's a related bug about how something similar can happen when the
    backend gets overloaded, but *everything is working* -- we just ought to
    be talking straight to the proxy app.
    
    Note that there's likely something similar going on with container info,
    but the hardcoded 10% sampling rate makes it harder to see if you're
    monitoring raw metric streams.
    
    I thought I fixed this in the related change, but no :-/
    
    Change-Id: I49447c62abf9375541f396f984c91e128b8a05d5
    Related-Change: If9249a42b30e2a2e7c4b0b91f947f24bf891b86f
    Related-Bug: #1883214
This commit is contained in:
Zuul 2023-03-02 22:15:02 +00:00 committed by Gerrit Code Review
parent 592da965c0
commit 5f4d6dcc2d
1 changed files with 1 additions and 1 deletions
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swift

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Subproject commit 55bf0d1224e3e8541da01139eecf7d5c7b947f94
Subproject commit a2952962d2f451d63b482646e23f515be9b00b86