Enable AOF but not RDB

[chilumb...@gmail.com]

If i have aof enabled on masters and slaves in a redis cluster, but with rdb only enabled on the slaves and not the master. If a redis master crashes, and its slave takes over through a failover, will the slave get a full data sync and allow the cluster to perform normal?

[Itamar Haber]

Persistence (with RDB and/or AOF) isn't related to replication per se - it allows you to recover when both master and slave(s) fail simultaneously (e.g. multi-node failure or system meltdown). Regardless whether you're using persistence, slaves are asynchronously kept in sync with the master.

On Mon, Nov 16, 2015 at 10:07 AM, <chilumb...@gmail.com> wrote:

If i have aof enabled on masters and slaves in a redis cluster, but with rdb only enabled on the slaves and not the master. If a redis master crashes, and its slave takes over through a failover, will the slave get a full data sync and allow the cluster to perform normal?

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[chilumb...@gmail.com]

Thank you Itamar for your shading light on redis persistence.

[chilumb...@gmail.com]

One more question Itamar. So if i disable rdb on both the masters and slaves, would i be able to recover the data just by using AOF enabled on both Master and Slave? I would like to disable rdb to avoid disk I/O waste.

On Monday, November 16, 2015 at 4:10:42 PM UTC+8, Itamar Haber wrote:

[Josiah Carlson]

I am not Itamar, but the AOF is intended to be used as an alternative to snapshots. And yes, your master and slave will work just fine with only AOF enabled.

 - Josiah

[Itamar Haber]

Feel free to pick up my slack any time not Itamar, it is an honor.

Not Josiah

[chilumb...@gmail.com]

You guys are cool. And thank you for answering my questions. I am learning a lot from this Google group.

Sent from my iPhone

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[Sumit Kandoi]

Hello Itamar, 

Regardless whether you're using persistence, slaves are asynchronously kept in sync with the master.

It means if we are not using AOF and RDB in any of the node (master and slave) still data will replicate from master to slave Node in async manner.