Cold start for new items

Model 15

Choose

Sellers list 50 new items/s. Item vectors come from clicks, so a new item has no vector and cannot appear in results. New items must be findable within 30 s. A listing must save within 200 ms at p99. Budget 800 USD/mo. Choose how new items reach the item index.

Goals

Not tested yet

99 of 100 requests finish faster than this.99 of 100 requests finish faster than this.How old the data is when a reader gets it.What the servers and services cost each month.
Choose a design
Add new items at the nightly retrain
Embed the item text inside the listing request
Embed the item text from the change stream