From f834ceafddac0db2bb850b9d96c1430f9ee3b6a9 Mon Sep 17 00:00:00 2001 From: "min.tian" Date: Wed, 22 Sep 2021 11:33:53 +0800 Subject: [PATCH] [skip ci] Modify the docs of system_overview (#8269) Signed-off-by: min.tian --- docs/developer_guides/chap01_system_overview.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/developer_guides/chap01_system_overview.md b/docs/developer_guides/chap01_system_overview.md index 7c42c9f2c4..162d8881b7 100644 --- a/docs/developer_guides/chap01_system_overview.md +++ b/docs/developer_guides/chap01_system_overview.md @@ -30,7 +30,7 @@ Each collection or partition contains a set of 'segment groups'. Segment group i -The main components, proxy, WAL, query node, and write node can scale to multiple instances. These components scale separately for better tradeoff between availability and cost. +The main components, proxy, WAL, query node, and write node can scale to multiple instances. These components scale separately for a better tradeoff between availability and cost. The WAL forms a hash ring. Requests (i.e. inserts and deletes) from clients will be repacked by proxy. Operations shared identical hash value (the hash value of primary key) will be routed to the same hash bucket. In addition, some preprocessing work will be done by proxy, such as static validity checking, primary key assignment (if not given by user), timestamp assignment.