Several other questions about lmdb
1) does lmdb store one key-value pair in a single page? How lmdb organizes these key-value
pairs in a single page
2) if size is larger than single page size , how lmdb process this request?
Any help will be appreciated ? thanks
From: Shu, Xinxin
Sent: Thursday, March 19, 2015 3:49 PM
Cc: Shu, Xinxin
Subject: questions about LMDB
Hi list ,
Recently I read docs about lmdb , there are two sentences
1) readers do not block writers
2) writers do not block readers
I can understand 'readers do not block writers' , but cannot understand the second
one , can someone help explain , how lmdb achieve 'writers do not block readers',
below is my understandings , please correct me if anything wrong.
if the access pattern is write - read, since lmdb only support two version of data ,
when the write has been started but not committed , the concurrent read may read stale
data since write has not been committed.