[tarantool-patches] [PATCH v3] replication: remove old snapshot files not needed by replicas

[Vladimir Davydov]

On Thu, Jun 28, 2018 at 06:41:20PM +0300, Serge Petrenko wrote:
> Garbage collection doesn't distinguish consumers which need checkpoint
> files, such as backup, and the ones, who only need WALS, such as
> replicas. A disconnected replica will 'hold' all checkpoint files, created
> after it got unsynchronised, even though it doesn't need them, which may
> lead to disk space shortage. To fix this, we store consumer's type, and
> treat consumers differently during garbage collection: now only the old
> WALS are stored for replicas, and old checkpoints are stored for backup,
> if any. Also changed the tests to check updated garbage collection correctly.
> 
> Closes #3444
> ---
> https://github.com/tarantool/tarantool/tree/sergepetrenko/gh-3444-remove-old-shapshots-for-replicas
> https://github.com/tarantool/tarantool/issues/3444

Looks good to me. Kostja, please take a look.