* don't call initCursor on happy path

* don't call initCursor on happy path

* don't run stale reads goroutine for inMem mode

* don't call initCursor on happy path

* remove buffers from cursor object - they are useful only in Badger implementation

* commit kv benchmark

* remove buffers from cursor object - they are useful only in Badger implementation

* remove buffers from cursor object - they are useful only in Badger implementation

* cancel server before return pipe to pool

* try  to fix test

* set field db in managed tx

* set Pooled=true

* don't call initCursor on happy path

* Fix body fetch

* Reduce spurious reorgs

* Exit the sync cycle after unwinds

* Fix out of range

* No stalling check for staged sync

* Disable failing tests

* Remove duplicate log message

* Fix UnwindTest and add assertions

* Fix formatting

* Cleanup

* Fix off by one error with bodies

* Remove rollback

* lil etl changez

* fix test compile

* fixups to the unwinds

* add new buffer mode

* support unfinished transitions

* fixups

* fix tests

* linters

* linters

* Enable NoReadahead by default

* don't call lmdb.IsNotFound on happy path

Co-authored-by: Alexey Akhunov <akhounov@gmail.com>

* Fixes to stages

* Fix formatting

* Fixes to stages

* Fix formatting

* Fix linter

* Fix lint

* Updates

* Next update

* Update

* Test works

* Cleanup

* Fix formatting

* Fix formatting

* Cleanup

* Fix core test

* Reinstate randomness for reorgs

* remove unused slice from MultiPut

* mutation: reuse tuples slice and preallocate bucketPuts

* use bucketPool in kv_lmdb

* remove duplicated check of context status

* more benchmarks

* remove reusage of puts

* Profile all stages

* Try to recover senders with 8 goroutines

* fix CPU profiling for stage_bodies

* fix out-of-index

* Try full DAG for verfication of header seals

* Try to unroll fnvHash for performance

* SSE2 assembly for fnvHash16

* fnvHash16AVX2

* Revert changes to state.go

* check we're on 64-bit in useAVX2

* Shave a move off fnvHash16AVX2

* asmdecl doesn't know about VMOVD

* disable linter in the right place

* Upgrade lmdb to version of 2019, which is compatible with https://github.com/jnwatson/py-lmdb (lmdb of 2020 year version - upgaded lock file version from 1 to 2 - and python binding can't open database if lockfile exists - if main app is running).

* remove ctx from MustOpen

* remove ctx from Open. Stop goroutines on Close.

* remove ctx from Open. Stop goroutines on Close.

* remove ctx from remote open (we have DialTimeout field to manage connection timeouts)

* enable RawReads and add native implementation of Get/Has methods

* Debug infos

* bucketStats lmdb by default

* Use bools instead of strings

* Fix linters

* Fix linter

* Finally fix

* Fix compile error

* Fix test

* Fix formatting

* Fix shadowing

* Cleanup

* cleanup

* save state

* txlookup full results

* save state

* save state

* remove experiments

* some fix&lint

* add end key to txLookup and index generation

* change log message

* change log

* fix lint

* lint

* fix test

* lmdb bucket stats

* fix lint warnings

* add bucket.Size method

* add bucket.Size method

* Euphemerally -> Ephemerally

* Move StorageMode to ethdb and pass it to PrepareStagedSync

* linter

* Remove StorageModeThinHistory and move SetStorageModeIfNotExist into storage_mode.go

* Optionally write receipts in the execute stage

* memory profiler

* linter

* proper linter fix

* linter

* typo

* Merge stateDb with changeDb so that all-or-nothing is commited in stage_execute

use `s.UpdateWithStageData(db, <block number>, <key>)` to store the key

use `s.StageData` with `etl.NextKey` to restart ETL from where it was interrupted.

* enable_golint_with_conditions

* enable_golint_with_conditions

* Upgrade uint256 to v1.1.0

* go mod tidy

* Start from 9m7

* Regenerate IH + receipts

* Only stats for iH bucket

* Persist receipts

* Go all in

* Start from block 10m

* Convert DbState to use plain state

* Fix findHistory

* Hard-code export

* More fixes

* Fix test

* Fix formatting

* Introduce PlainDbState

* Actually return PlainDbState

* Fix formatting

* Fix name style lint

* Fix linters

* Fix history_test

* Fix blockchain_test

* Fix compile error

* Bucket stats from all buckets

* Lmdb internal objects reuse (built-in feature of lmdb):
- lmdb read transactions pool
- lmdb also support cursors reuse, but not implemented in this PR

And kv abstraction objects reuse:
- lmdbKV pool of all tx objects
- boltKV pool of all tx objects
- badgerKV pool of all tx objects

* switch makefile back to bolt

* switch makefile back to bolt

* lmdb test run

* switch makefile back to bolt

* cursors pool

* run lmdb tests

* make kv objects pool global

* switch makefile back to bolt

* remove badgers GOMAXPROC setup, because our app tunned for sequential read/writes, not for random throughput

* simplify code

* some stubs

* post rebase

* fixups

* linter

* linter 2

* Update stages.go

* Query progress

* Run stage4 offline

* More thorough resetState

* Correct BlockNumber

* Fix formatting

* State loop

* do every 200k blocks

* Shift to 6.6m

* Close dbs in tests

* Stage2 with option of no reset

* every 100k blocks

* Reset state before stage5

* Introduce another stage

* Check compile errors

* Fix linter

* Fix linter

* Disable unreliable test

* Fix test

* Remove unreachable code

* optimize codeBitmap

* add lru

* remove custom lru

* jumpDests as explocit parameter

* lint

* lint

* linters

* default jumpDestsCache

* remove common.rand

* check stop on every block inside jobs

* stop spawnRecoverSendersStage properly

* fmt

* close recoverSenders goroutines

* fmt

* Unwinding for stage5 - start

* Fix formatting

* Integrated unwind, but no tests yet

* Fix formatting

* Fix lint

* Fix lint

* Test for unwind stage5

* Fix formatting

* try lmddb

* try badger

* try bigger badger

* try lmb

* release

* release

* release

* release

* try badger

* try lmdb low memory

* try lmdb low memory

* lmdb high memory (16Mb not enough for /eth/downloader package)

* badger more memory

* badger more memory

* badger more memory

* Incremental promotion

* Fix compile errors

* Fix linter

* Transform state keys before loading

* Re-enable and fix the tests

* Fix formatting

* prevent slice make and copy in Pushes

* do not pad if the same length

* after CR

* linters

* linters

* linters

* lmdb tests

* trigger ci

* fix tests

* disable parallelism

* disable parallelism

* cleanup resources

* cleanup resources

* reduce concurency

* try run tests on bolt

* try run tests on bolt

* fix downloader test

* run bolt tests

* rely on interface instead of exact instance

* Rename AbstractKV to KV

* don't use separator for badger

* don't initialize badger cursor - because it not used here

* fix linter

* try reduce badger compactors

* compat with master

* try lmdb

* try lmdb

* try lmdb

* reduce badger's MaxTableSize, reduce badger's minGoMaxProc for inMem option

* allow to close closed db

* release

* release

* ideal batch size for badger

* ideal batch size for badger

* Bolt: cursor.Put

* go mod tidy

* uint256 in rlp

* uint256 rather than big.Int in Transation

* linters

* more linters

* still linters

* Reduce garbage in writeUint256

* Experiment with GC in writeByteArray

* Misc GC optimisations

* unsafe experiment with writeByteArray