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Updated Directories and Files (markdown)

Chris Lu 2018-08-23 00:39:14 -07:00
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Directories-and-Files.md

@ -45,10 +45,11 @@ visit "http://localhost:8888/path/to/sources/?lastFileName=abc.txt&limit=50"
## Architecture
Filer has a persistent client connecting to Master, to know the locations of all volumes.
For file reads:
1. Filer lookup metadata from Filer Store, which can be Cassandra/Mysql/Postgres/Redis/LevelDB.
2. Filer lookup the volume id locations if not in the cache.
3. Filer read from volume servers and pass along to the read request.
2. Filer read from volume servers and pass along to the read request.
![](FilerRead.png)
For file writes: