Write-through cache - write data to cache and to db at the same time
Better consistancy but higher latency
Write-around cache - write to DB, omit cache. Populate cache with miss. Similar to Pull on HTTP CDN Caching#Content Distribution Network CDN.
No flood on cache system, but higer latency for recent data reads.
Write-back cache - just write to cache, replicating to main storage when needed.
Very fast write/read feeback but with the loss of consistancy