[QUESTION]: Why badger use WAL?

[aceking]

Question.

I see the badge codes, in memtable.go file, there is wal for memtable, but I have read wisckey paper, Instead of wal, the vlog can ensure the consistency, Why bager still use wal ?

[Aman Mangal]

At some point, we realized that VLOG GC was getting complex due to the fact it was also used as a WAL. In Dgraph, we don't even use VLOG any more. I think this needs rework.

[aceking]

Thanks