GlusterFS Pending Value Introduction

Suppose test-vol is a replicate volume, there are two bricks (brick-0, brick-1) in the test-vol

There is a test-file in test-vol, the test-file are in brick-0 and brick-1

There are some extension attributions in test-file in brick-0 and brick-1. they are "trusted.afr.test-vol-client-0" and "trusted.afr.test-vol-client-1"