How to configure RDB + AOF combined backups

[Matthew Rathbone]

Hey all,

Been a big fan of Redis since 2011, and I'm excitedly starting the 4.0.1 upgrade for a bunch of our data.

One question I had was -- is there any documentation / guidance yet on how the new combined RDB / AOF backup scenario works?

More specific questions:

It is not clear to me how I enable this, or what settings it has. Do I just enable both RDB and AOF and it figures it out, or do I need to set a new configuration option?

Does it use the two separate files (dump.rdb and appendonly.aof), or is it a new combined file format?

Thanks for guidance!

Matthew

[Itamar Haber]

Hello Matthew,

This hasn't changed since forever: just enable both and, unless you change the defaults, it will use these two filenames.

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[Jan-Erik Rediger]

I guess Matthew is referring to the new AOF-with-RDB-preamble.
To enable it you need to set the aof-use-rdb-preamble to yes.

See https://github.com/antirez/redis/blob/4.0/redis.conf#L746-L782

On Wed, Jul 26, 2017 at 10:54:03PM +0300, Itamar Haber wrote:
> Hello Matthew,
>
> This hasn't changed since forever: just enable both and, unless you change
> the defaults, it will use these two filenames.
>
> On Wed, Jul 26, 2017 at 9:56 PM, Matthew Rathbone <mat...@sal.tt> wrote:
>
> > Hey all,
> >
> > Been a big fan of Redis since 2011, and I'm excitedly starting the 4.0.1
> > upgrade for a bunch of our data.
> >
> > One question I had was -- is there any documentation / guidance yet on how
> > the new combined RDB / AOF backup scenario works?
> >
> > More specific questions:
> > It is not clear to me how I enable this, or what settings it has. Do I
> > just enable both RDB and AOF and it figures it out, or do I need to set a
> > new configuration option?
> >
> > Does it use the two separate files (dump.rdb and appendonly.aof), or is it
> > a new combined file format?
> >
> >
> > Thanks for guidance!
> >
> > Matthew
> >
> > --
> > You received this message because you are subscribed to the Google Groups
> > "Redis DB" group.
> > To unsubscribe from this group and stop receiving emails from it, send an

> > email to redis-db+u...@googlegroups.com.

> > To post to this group, send email to redi...@googlegroups.com.
> > Visit this group at https://groups.google.com/group/redis-db.
> > For more options, visit https://groups.google.com/d/optout.
> >
>
>
>
> --
>

> *Itamar Haber* | Chief OSS Education Officer
> *Redis <http://www.redislabs.com/>*Labs <http://www.redislabs.com/> ~/redis

>
> Mobile: +972 (54) 567 9692

> Twitter: @itamarhaber <https://twitter.com/itamarhaber>
> Skype: itamar.haber

>
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[Itamar Haber]

I guess that's a good guess :)

> > email to redis-db+unsubscribe@googlegroups.com.

> > To post to this group, send email to redi...@googlegroups.com.
> > Visit this group at https://groups.google.com/group/redis-db.
> > For more options, visit https://groups.google.com/d/optout.
> >
>
>
>
> --
>

> *Itamar Haber* | Chief OSS Education Officer
> *Redis  <http://www.redislabs.com/>*Labs <http://www.redislabs.com/> ~/redis

>
> Mobile: +972 (54) 567 9692

> Twitter: @itamarhaber <https://twitter.com/itamarhaber>
> Skype: itamar.haber

>
> --
> You received this message because you are subscribed to the Google Groups "Redis DB" group.

> To unsubscribe from this group and stop receiving emails from it, send an email to redis-db+unsubscribe@googlegroups.com.

> To post to this group, send email to redi...@googlegroups.com.
> Visit this group at https://groups.google.com/group/redis-db.
> For more options, visit https://groups.google.com/d/optout.

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[Matthew Rathbone]

Ok, I see!

So seems like this modifies the format of the AOF file to include an RDB component. So my existing RDB settings will not affect it. Rather this will happen when the AOF file is compacted.

That sounds correct?

Matthew