pragmaxim

``` case class BlockCache(byId: Map[BlockId, BlockInfo], byHeight: SortedMap[Int, BlockInfo]) case class ProgressState( lastBlockIdInEpoch: SortedMap[Int, BlockId], invalidEpochs: SortedMap[Int, InvalidEpochCandidate], blockCache: BlockCache ) ``` ``` val x = stateRef.transformAndExtract { state =>...

ON CONFLICT DO NOTHING is expensive operation

2

Hey, I've done some profiling as indexing data significantly slowed down after I added `upsert` operation in postgresql mode, and turns out that `throw getDuplicateKeyException(k.toString());` in `MVSecondaryIndex#checkUnique` is extremely expensive...

Question: Can MVMap Index for a Key change?

1

Hey, I'm building a multi-map storage that needs a lot of secondary indexes so in : ``` xByY: MVMap, yByZ: MVMap ``` I'd like to replace `Y` for its index...

DB Index is created over ergoTreeTemplate which is being created for all ergoTrees instead of just P2PK

1

Hi, This might improve performance a lot in both query time and indexing time. Problem : - ErgoTreeTemplate is created here for ALL ErgoTrees instead of just P2SH. The Template...

Adding new elements

3

Hi, just out of curiosity, why you haven't implemented adding new elements to an existing instance? As it does not seem to be too challenging or am I missing something?

Scylla version 5.0.1-0.20220719.b177dacd3 nodetool ReleaseVersion: 3.0.8 From https://hub.docker.com/r/scylladb/scylla/ Having : ``` CREATE KEYSPACE keyspaceFoo WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '1'}; ``` And : ``` nodetool disableautocompaction keyspaceFoo tableX tableY...

Add ZPipeline to Processor conversion

3

`org.reactivestreams.Processor` is an equivalent of `ZPipeline` or `akka.stream.scaladsl.Flow` and when integrating between different reactive "implementation", it is possible to create it using `org.reactivestreams.FlowAdapters.toFlowProcessor` ... Akka-stream has `flow.toProcessor` method but I...

InputLike interface with boxId

1

Regarding this comment https://github.com/ergoplatform/ergo/pull/1549#discussion_r777116646 We could have functions accepting `InputLike` when they are only interested in `boxId`

Explicit db.flush() does not work when wal disabled in OptimisticTransactionDB

2

### Expected behavior `db.flush` should flush memtables to sst files. I use it in a shutdown hook so that I don't loose data as I am disabling WAL for performance...

Repro https://github.com/pragmaxim-com/rust-playground/commit/e5ec1c6956d8868a6e09257fc71fb40fada2bab4 `db.flush` call does not lead to new (the first) sst file being created ... not even after thread-sleep 10 seconds after commit or after flushing