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#mongodb logs for Wednesday the 2nd of October, 2019
[00:59:37] <GothAlice> alexi5: I use it for many and varied things. I personally have just shy of 50 TiB of bulk file storage data (my "exocortex" deep archive of everything digital I have touched since 2001), at work I use it for a crazy number of things. At a basic level: primary data storage (of application-level records, essentially a serialization for the application model), caches (mmapv1 is memory-mapped… and you can pin pages so they never swap, plus
[00:59:37] <GothAlice> TTL indexes for auto-expiry), low-latency push queue (capped collections are insertion-order ring buffers of fixed size), etc.
[01:02:42] <GothAlice> At a high level this helps implement an online e-commerce (transactions, woo!) job offer distribution platform (the primary data), with tracked analytics using pre-aggregated reporting (aggregate pipelines and views giving constant time reporting FTW!), cluster-distributed RPC using the queues for event notification, facilitating cluster-distributed async generator pipelines (generator on one node, consumer on another, possibly generating
[01:02:42] <GothAlice> more records for the next pipeline stage on another machine…), with all that powering large-scale website and feed scraping / data ingress, with a little logging aggregation sprinkled in.
[01:15:16] <GothAlice> Heeeeeeh. Exocortex also contains a copy of Wikipedia, Wikibooks, most of StackOverflow + various StackExchanges, all of Project Gutenberg, … :cough:
[11:36:01] <tommy_the_dragon> http://mongodb.github.io/node-mongodb-native/3.3/tutorials/aggregation/
[11:36:41] <tommy_the_dragon> Pretty sure in the first example the first pipeline stage doesn't filter out all documents except those with 5 in the stars field. If it does the syntax is especially wierd.
[11:53:18] <Intelo> How to update part of my object. First select by id? then update (I want to insert a new json in it). Can anyone show me the correct query?