I don't see the ability to search within the app. Have they not rolled it out yet?

One solution is to download an archive and grep the JSON returned

"The simplified data schema directly reduced the size of data on disk. We saved additional space in MyRocks by applying Zstandard, a state-of-the-art lossless data compression algorithm developed by Facebook. We were able to reduce the replication factor from six to three, thanks to differences between the HBase and MyRocks architectures. In total, we reduced storage consumption by 90 percent without data loss, thereby making it practical to use flash storage."

There seems to be a pattern with Google: they have internal infrastructure that every ex-Googler seem to miss when they leave the company, because it's so good that it felt like being 10 years in the future.

As far as I understand, Google doesn't have a bunch of tools that merely work together, they have one huge system with different bits that _live_ together, so much that separating and open-sourcing them is cool but won't give you the same thing as being from inside:

- They use Blaze, a build system that integrates directly with the object store. They open-sourced Bazel as a kind of equivalent, but the build system won't shine unless you have an integrated object store and an integrated vcs client - They have open-sourced Kubernetes, a successor of what they were using for they were using internally for cloud management - They have open-sourced LevelDB, a successor of the fundamental brick they are using for BigTable

So in a way LevelDB isn't used as-is inside Google, but its spirit is in use at a fundamental level by pretty much everyone

No, it does not. Generally speaking, Google "converges" a layer up (BigTable, Spanner, Colossus). There is no layer like LevelDB that is common to all of these.

Iris retries the failed request

You can use the download your information tool to download all your data on FB, including all your messages https://www.facebook.com/help/212802592074644

A Brooklyn based artist did this recently and made a book of his conversation history (and covered an apartment with some of the pages). You can find a bit more information and pictures at https://www.halfspace.uk/messages-2011-2017

Unfortunately, the feature to export your messages is only available to Facebook's data partners.

Anyone know why Facebook moved off HBase? (article doesn't address this)

I get that MyRocks is truly amazing, but I'm wondering what issues they were facing with HBase. I heard HBase was picked over Cassandra (developed at FB) because it was strongly consistent vs Cassandra's eventual consistency.

+ app server / schema rework

Have they published a paper on this on Facebook Research?

This has nothing to do with video though.