From e2c41fbd2f92ce5d249f96fd6c2c3aa0b7e511e2 Mon Sep 17 00:00:00 2001 From: Chris Lu Date: Thu, 23 Aug 2018 00:57:10 -0700 Subject: [PATCH] Updated Directories and Files (markdown) --- Directories-and-Files.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Directories-and-Files.md b/Directories-and-Files.md index 3c2e3b1..d8eda34 100644 --- a/Directories-and-Files.md +++ b/Directories-and-Files.md @@ -45,7 +45,8 @@ 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. +Filer has a persistent client connecting to Master, to get the location updates of all volumes. +There are no network round trip to lookup the volume id location. For file reads: 1. Filer lookup metadata from Filer Store, which can be Cassandra/Mysql/Postgres/Redis/LevelDB.