memcache for keystone authtoken should be a single server
Bug #1634646 reported by
Alex Schultz
This bug affects 2 people
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| tripleo |
Triaged
|
Wishlist
|
Unassigned | ||
Bug Description
Any service that wants to use memcache for the keystone authtoken caching should be configured with a single server for optimal performance when server might be unavailable. This is due to the way most python memcache libraries operate. The python-memcached hashes the key to a specific server but if that server is down it impacts every request from then on.
https:/
Based on previous experience it was determined that the best all around solution was to configure a single memcached server (preferably localhost) for the authtoken caching to prevent SLA issues when memcache (or physical) servers fail.
| description: | updated |
| description: | updated |
Revision history for this message
| Alex Schultz (alex-schultz) wrote | #1 |
Revision history for this message
| Alex Schultz (alex-schultz) wrote | #2 |
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| milestone: | ocata-1 → ocata-2 |
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| milestone: | ocata-2 → ocata-3 |
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| importance: | Medium → Wishlist |
| status: | Confirmed → Triaged |
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| milestone: | ocata-3 → pike-1 |
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| milestone: | pike-1 → pike-2 |
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| milestone: | pike-2 → pike-3 |
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| milestone: | pike-3 → pike-rc1 |
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| milestone: | pike-rc1 → queens-1 |
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| milestone: | queens-1 → queens-2 |
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| milestone: | queens-2 → queens-3 |
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| milestone: | queens-3 → queens-rc1 |
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| milestone: | queens-rc1 → rocky-1 |
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| milestone: | rocky-1 → rocky-2 |
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| milestone: | rocky-2 → rocky-3 |
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| milestone: | rocky-3 → rocky-rc1 |
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| milestone: | rocky-rc1 → stein-1 |
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| milestone: | stein-3 → train-1 |
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| milestone: | train-1 → train-2 |
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| milestone: | train-2 → train-3 |
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| milestone: | train-3 → ussuri-1 |
| description: | updated |
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| milestone: | ussuri-1 → ussuri-2 |
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| milestone: | ussuri-2 → ussuri-3 |
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| milestone: | ussuri-3 → ussuri-rc3 |
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| milestone: | ussuri-rc3 → victoria-1 |
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| milestone: | victoria-1 → victoria-3 |
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An alternative would be to put something like twemproxy (https:/