Batched writes do not respect maxFileSize.

[kevinswiber]

The entire batch gets written to a single file.

[kevinswiber]

Without managing an internal state of temp files, I'm not sure how to get around this. A batch bigger than the underlying operating system's maximum file size will break. If there's not a quick fix, I'm okay with this bug hanging out for a while.

[kesla]

perhaps one of the cases where we automatically should start a compaction (as disussed in #1) is when a batch has created a file larger than maxFileSize?

[kesla]

That way the batch would only create a single file larger than maxFileSize for a limited amount of time.

[kevinswiber]

@kesla Yep. I tried auto-compacting on file wraps, too, but hit some concurrency error. I didn't dig into it. We just need a whole round of auto-compact commits (per #1).