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Comment by lighthawk | Hacker News Reader

"And we now have some exciting news to share: we are running MongoDB on RocksDB in production for some workloads and we’re seeing great results!"

Some stats and a way to replicate would be nice here.

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Like I said in the post, we're preparing a series of blog posts for next week that does a deep dive into our workloads, our benchmarks, how to repro, etc.

Spoiler alert: we consistently get around 90% compression and the inserts are ~50x faster. ^_^

Compared to MMAPv1 or compared to WiredTiger?

We're testing with both. Somewhat hindered by the fact that WT often dies trying to import our data, or crashes, or loses data in weird ways. :( I believe WT will eventually get there, but rocks has been unfathomably more solid for us so far.

WT has been pretty decent for us (only TB level amount of data, so probably not as much as you folks are dealing with). The thing it has issues with is occasionally using the wrong indexes and caching them, and even putting hints in does not solve the issue in all cases. It started happening on WT, but it seems to be mongo's issue and not the storage engine.

We have a lot of edge cases in our data set and usage model, no question. Glad it's working well for you. :)

ah but those particular compression / write rate stats are compared to mmapv1, yeah

Very cool. Btw, sorry to hijack, please also let your colleagues know that they need to update the SSL cert used in *.parseapp.com, e.g. http://sha1affected.com/results?server=doitfordenmark.parsea...

tszming -- will take care of it, thank you!

> we consistently get around 90% compression

For unicode and BSON?

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