My non-expert belief is that, in the case of mysqllvm EBS storage, the
bundle is a snapshot of the EBS volume of the master (the slaves don't
use EBS - except when starting up - a volume is created from the last
snapshot and attached in order to get the MySQL data files from which
to re-start replication).
A backup, I think is just a .tar.gz file saved to S3.  It is probably
the MySQL data files, but may be a .sql export (not sure - never
looked).

In the case of LVM storage, the bundle process uses LVM to snapshot
the ephemeral volume.  Not sure what form the bundle is stored in -
perhaps directly as-is to S3? (haven't tried this storage option).

At least one slave instance must be running to use backup (not sure
about bundle), probably because it halts writing/replication so that
the snapshot is in a consistent FS state.

My 2cents.
-David.


On Aug 28, 12:24 pm, mmalamud <[email protected]> wrote:
> Guys, can you briefly explain the difference between the two. Thanks.

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