[romka2]

> That appears to be exactly RecordIO.

I suppose you mean "exactly" in a figurative way. Riegeli is definitely inspired by RecordIO and is meant as a successor to it but it's not RecordIO.

> Is there a reason that doesn't meet your requirements?

I need to store timeseries with fast lookup by timestamp. Riegeli doesn't support this out of the box. If I had discovered it before I built ChunkIO, I probably would've pulled the low-level code out of it and added timeseries support on top. Or maybe not. Reliability is very important to me and it's risky to use work-in-progress software that may or may not have any production footprint (I'm no longer with Google so I don't know if they use it internally.)

[shereadsthenews]

I don't understand. RecordIO doesn't support lookup of any kind; it is a linear format. The interface of Riegeli looks to me exactly like the interface to RecordIO. All they've done is removed support for Google's abstract File* storage interface so it can be used by the public.

What you are describing sounds like SSTable. Perhaps you could benefit from LevelDB.

https://www.igvita.com/2012/02/06/sstable-and-log-structured...

[romka2]

RecordIO supports a form of random access lookup, although it's rarely used. Riegeli supports random access lookups as a first-class operation.