redis cluster salves election priority

[Sury Bu]

In redis cluster mode, one master have several slaves, is there have some priority parameters that can make the specified salve election as the new master?

Since the master and slaves will host in the different available zone, we want the slave locate in the same available zone with win the election first.

[wen...@gmail.com]

As soon as a master is in FAIL state, a slave waits a short period of time before trying to get elected. That delay is computed as follows:

           DELAY = 500 milliseconds + random delay between 0 and 500 milliseconds + SLAVE_RANK * 1000 milliseconds

so, different slave will try to get elected at different time, SLAVE_RANK negotiate between all slaves when master is failing(the slave with the most updated replication offset is at rank 0, the second most updated at rank 1, and so forth.)

在 2017年3月31日星期五 UTC+8下午3:00:10，Sury Bu写道：

[charlie kwon]

http://redisgate.com/redis/sentinel/sentinel_election.php

This page introduces electing a sentinel leader.

Cluster leader elections are similar.

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[Sury Bu]

How can we change the DELAY value and set the salve in the different AZ lager?

[Sury Bu]

we have test the "slave-priority 100" parameter , it can't work in the cluster mode.

On Sunday, April 2, 2017 at 9:46:56 PM UTC+8, charlie kwon wrote:

http://redisgate.com/redis/sentinel/sentinel_election.php

This page introduces electing a sentinel leader.

Cluster leader elections are similar.

2017-04-01 11:39 GMT+09:00 <wen...@gmail.com>:

As soon as a master is in FAIL state, a slave waits a short period of time before trying to get elected. That delay is computed as follows:

           DELAY = 500 milliseconds + random delay between 0 and 500 milliseconds + SLAVE_RANK * 1000 milliseconds

so, different slave will try to get elected at different time, SLAVE_RANK negotiate between all slaves when master is failing(the slave with the most updated replication offset is at rank 0, the second most updated at rank 1, and so forth.)

在 2017年3月31日星期五 UTC+8下午3:00:10，Sury Bu写道：

In redis cluster mode, one master have several slaves, is there have some priority parameters that can make the specified salve election as the new master?

Since the master and slaves will host in the different available zone, we want the slave locate in the same available zone with win the election first.

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[wenk712]

as far as i know, there is no any way to change DELAY  so far

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