Manual:$wgMainStash

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Cache: $wgMainStash
Replicated object cache setting
Introduced in version:1.26.0
Removed in version:still in use
Allowed values:(One of the CACHE constants) see below
Default value:CACHE_NONE

Details[edit]

This setting controls the cache used by methods that store temporary values that need to be seen in all datacenters. This is not true of $wgMainCacheType , which should be a fast and local-only cache. Ideally, a better effort should be made to reduce evictions are data loss during power outages that main cache stores (e.g. redis with disk-persistence enabled and allkeys-lru). Nevertheless, the store does not need to be a robust ACID compliant database, it should merely be a fast, memory-based, store that replicates data to all sites. A modest amount of eviction or lost data (such as on fail-over) can be tolerated.