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Add EventStore source support to sync
Template
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Add EventStore source support to Apr 14, 2019
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Marking as ready for review - I still have some tidying to do, but the basic split between Sync's EventStore mode and the Ingest Program (which started life as a Template) is now in place. |
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While this works, provides good throughput and other things, there's still stuff to do so it's really not ready to "review" in the sense of evaluating "is this a clean simple ingester?" atm (clue: atm the code is too messy, and there is an obvious need to add support for doing multiple concurrent readers)TL;DR at the moment its a POC EventStore->Equinox.CosmosDb one-way ingester, but the general principle is that there are lots of uses for an efficient bulk sync tool working at the stream level in order to optimize ingesting performance (and batch writes to same stream) - this allows one to subset by Category and/or do transforms when propagating data onwardThis is approaching the final shape of things in that - theSync
program is intended to be a continuous app you run in prod that can support Cosmos -> Cosmos and EventStore -> Cosmos ingestion - theIngest
Program only applies to EventStore -> Cosmos loading and is intended to be run once on a standalone basisThe equinox-sync template's
Sync
app includes support for both the striped reading (which was originally pioneered in anIngest
application) (badged gorge mode ,-g
) and working as a more traditional projector (which it reverts to after any gorge mode)Work list:
Equinox.Cosmos
event_global_position = 256 x 1024 x 1024 x chunk_number + chunk_header_size (128) + event_position_offset_in_chunk
)support ingesting from CosmosDb into Cosmosnow indotnet new eqxsync
aux
collection-i
and-g
impls using max of both and then adjusting when switching to tailingEventStoreSink
fix tailing switch for ES where >1 discover EOFFix StripedIngester transition to tailing propulsion#10re-add stream catchup reading for ESAdd Streamwise Catchup mode propulsion#11