37 lines
1.4 KiB
Markdown
37 lines
1.4 KiB
Markdown
Overview
|
|
========
|
|
|
|
**TimelineRanker** (TLR) is a legacy service which provides relevance-scored tweets from the Earlybird Search Index and User Tweet Entity Graph (UTEG) service. Despite its name, it no longer does any kind of heavy ranking/model based ranking itself - just uses relevance scores from the Search Index for ranked tweet endpoints.
|
|
|
|
|
|
The following is a list of major services that Timeline Ranker interacts with:
|
|
|
|
**Earlybird-root-superroot (a.k.a Search)**
|
|
|
|
Timeline Ranker calls the Search Index's super root to fetch a list of Tweets.
|
|
|
|
**User Tweet Entity Graph (UTEG)**
|
|
|
|
Timeline Ranker calls UTEG to fetch a list of tweets liked by the users you follow.
|
|
|
|
**Socialgraph**
|
|
|
|
Timeline Ranker calls Social Graph Service to obtain follow graph and user states such as blocked, muted, retweets muted, etc.
|
|
|
|
**TweetyPie**
|
|
|
|
Timeline Ranker hydrates tweets by calling TweetyPie so that it can post-filter tweets based on certain hydrated fields.
|
|
|
|
**Manhattan**
|
|
|
|
Timeline Ranker hydrates some tweet features (eg, user languages) from Manhattan.
|
|
|
|
**Home Mixer**
|
|
|
|
Home Mixer calls Timeline Ranker to fetch tweets from the Earlybird Search Index and User Tweet Entity Graph (UTEG) service to power both the For You and Following Home Timelines.
|
|
|
|
Timeline Ranker does light ranking based on Earlybird tweet candidate scores and truncates to the number of candidates requested by Home Mixer based on these scores
|
|
|
|
|
|
|