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Author SHA1 Message Date
Anna Shaleva
bd6bb9e9e2 core: allow to reset blockchain state 2022-11-10 18:08:17 +03:00
Roman Khimov
97193cf337 golangci: add predeclared linter 
These can be confusing.
 2022-09-02 18:36:26 +03:00
Roman Khimov
4f3ffe7290 golangci: enable errorlint and fix everything it found 2022-09-02 18:36:23 +03:00
Roman Khimov
8cd7b93208 limits: new package with storage limits 
Packages like core/state or core/mpt shouldn't import whole core/storage just
to get some constant value, it's not a good dependency.
 2022-07-08 23:30:30 +03:00
Roman Khimov
9a06995460 bigint: don't allocate in ToPreallocatedBytes 
Turns out, it's almost always allocating because we're mostly dealing with
small integers while the buffer size is calculated in 8-byte chunks here, so
preallocated buffer is always insufficient.

name                   old time/op    new time/op    delta
ToPreallocatedBytes-8    28.5ns ± 7%    19.7ns ± 5%   -30.72%  (p=0.000 n=10+10)

name                   old alloc/op   new alloc/op   delta
ToPreallocatedBytes-8     16.0B ± 0%      0.0B       -100.00%  (p=0.000 n=10+10)

name                   old allocs/op  new allocs/op  delta
ToPreallocatedBytes-8      1.00 ± 0%      0.00       -100.00%  (p=0.000 n=10+10)

Fix StorageItem reuse at the same time. We don't copy when getting values from
the storage, but we don when we're putting them, so buffer reuse could corrupt
old values.
 2022-06-02 15:38:39 +03:00
Roman Khimov
c3d989ebda stackitem: reusable serialization context 
We serialize items a lot and this allows to avoid a number of allocations.
 2022-06-02 15:38:39 +03:00
Anna Shaleva
a427411a57 core: fix race during native cache persist 
Fixes the following race:
```
2022-05-06T06:51:33.3980029Z WARNING: DATA RACE
2022-05-06T06:51:33.3980178Z Read at 0x00c0007e02a0 by goroutine 96:
2022-05-06T06:51:33.3980338Z   runtime.mapaccess2_fast32()
2022-05-06T06:51:33.3980863Z       /opt/hostedtoolcache/go/1.17.9/x64/src/runtime/map_fast32.go:52 +0x0
2022-05-06T06:51:33.3981249Z   github.com/nspcc-dev/neo-go/pkg/core/dao.(*Simple).getCache()
2022-05-06T06:51:33.3982707Z       /home/runner/work/neo-go/neo-go/pkg/core/dao/dao.go:905 +0x64
2022-05-06T06:51:33.3983443Z   github.com/nspcc-dev/neo-go/pkg/core/dao.(*Simple).GetROCache()
2022-05-06T06:51:33.3983900Z       /home/runner/work/neo-go/neo-go/pkg/core/dao/dao.go:889 +0xd4
2022-05-06T06:51:33.3984231Z   github.com/nspcc-dev/neo-go/pkg/core/dao.(*Simple).getCache()
2022-05-06T06:51:33.3984869Z       /home/runner/work/neo-go/neo-go/pkg/core/dao/dao.go:913 +0x196
2022-05-06T06:51:33.3985254Z   github.com/nspcc-dev/neo-go/pkg/core/dao.(*Simple).GetROCache()
2022-05-06T06:51:33.3985756Z       /home/runner/work/neo-go/neo-go/pkg/core/dao/dao.go:889 +0xd4
2022-05-06T06:51:33.3986167Z   github.com/nspcc-dev/neo-go/pkg/core/native.(*Policy).isBlockedInternal()
2022-05-06T06:51:33.3986824Z       /home/runner/work/neo-go/neo-go/pkg/core/native/policy.go:258 +0x6a
2022-05-06T06:51:33.3987264Z   github.com/nspcc-dev/neo-go/pkg/core/native.(*Policy).IsBlocked()
2022-05-06T06:51:33.3987743Z       /home/runner/work/neo-go/neo-go/pkg/core/native/policy.go:250 +0x2f7
2022-05-06T06:51:33.3988155Z   github.com/nspcc-dev/neo-go/pkg/core/native.(*NEO).getAllCandidatesCall.func1()
2022-05-06T06:51:33.3988645Z       /home/runner/work/neo-go/neo-go/pkg/core/native/native_neo.go:948 +0x109
2022-05-06T06:51:33.3989053Z   github.com/nspcc-dev/neo-go/pkg/core/native.(*NEO).getAllCandidatesCall.func2()
2022-05-06T06:51:33.3989550Z       /home/runner/work/neo-go/neo-go/pkg/core/native/native_neo.go:959 +0x137
2022-05-06T06:51:33.3989561Z
2022-05-06T06:51:33.3989735Z Previous write at 0x00c0007e02a0 by goroutine 40:
2022-05-06T06:51:33.3989891Z   runtime.mapassign_fast32()
2022-05-06T06:51:33.3990260Z       /opt/hostedtoolcache/go/1.17.9/x64/src/runtime/map_fast32.go:92 +0x0
2022-05-06T06:51:33.3990640Z   github.com/nspcc-dev/neo-go/pkg/core/dao.(*Simple).persistNativeCache()
2022-05-06T06:51:33.3991084Z       /home/runner/work/neo-go/neo-go/pkg/core/dao/dao.go:876 +0x12d
2022-05-06T06:51:33.3991411Z   github.com/nspcc-dev/neo-go/pkg/core/dao.(*Simple).Persist()
2022-05-06T06:51:33.3991852Z       /home/runner/work/neo-go/neo-go/pkg/core/dao/dao.go:850 +0x1d4
2022-05-06T06:51:33.3992186Z   github.com/nspcc-dev/neo-go/pkg/core.(*Blockchain).runPersist()
2022-05-06T06:51:33.3992650Z       /home/runner/work/neo-go/neo-go/pkg/core/blockchain.go:1285 +0x28a
2022-05-06T06:51:33.3992971Z   github.com/nspcc-dev/neo-go/pkg/core.(*Blockchain).storeBlock()
2022-05-06T06:51:33.3993845Z       /home/runner/work/neo-go/neo-go/pkg/core/blockchain.go:1143 +0x1b9c
2022-05-06T06:51:33.3994241Z   github.com/nspcc-dev/neo-go/pkg/core.(*Blockchain).AddBlock()
2022-05-06T06:51:33.3994707Z       /home/runner/work/neo-go/neo-go/pkg/core/blockchain.go:910 +0x791
2022-05-06T06:51:33.3995053Z   github.com/nspcc-dev/neo-go/pkg/neotest.(*Executor).AddNewBlock()
2022-05-06T06:51:33.3995492Z       /home/runner/work/neo-go/neo-go/pkg/neotest/basic.go:334 +0xa7
2022-05-06T06:51:33.3995842Z   github.com/nspcc-dev/neo-go/pkg/neotest.(*Executor).InvokeScript()
2022-05-06T06:51:33.3996288Z       /home/runner/work/neo-go/neo-go/pkg/neotest/basic.go:178 +0x169
2022-05-06T06:51:33.3996725Z   github.com/nspcc-dev/neo-go/pkg/core/native/native_test_test.TestNEO_GetCandidates.func2()
2022-05-06T06:51:33.3997253Z       /home/runner/work/neo-go/neo-go/pkg/core/native/native_test/neo_test.go:549 +0x4cb
2022-05-06T06:51:33.3997672Z   github.com/nspcc-dev/neo-go/pkg/core/native/native_test_test.TestNEO_GetCandidates()
2022-05-06T06:51:33.3998404Z       /home/runner/work/neo-go/neo-go/pkg/core/native/native_test/neo_test.go:574 +0x2103
2022-05-06T06:51:33.3998751Z   github.com/nspcc-dev/neo-go/pkg/neotest.(*Executor).AddNewBlock()
2022-05-06T06:51:33.3999193Z       /home/runner/work/neo-go/neo-go/pkg/neotest/basic.go:334 +0xa7
2022-05-06T06:51:33.3999541Z   github.com/nspcc-dev/neo-go/pkg/neotest.(*Executor).InvokeScript()
2022-05-06T06:51:33.3999988Z       /home/runner/work/neo-go/neo-go/pkg/neotest/basic.go:178 +0x169
2022-05-06T06:51:33.4000305Z   github.com/nspcc-dev/neo-go/pkg/neotest.AddSystemFee()
2022-05-06T06:51:33.4000733Z       /home/runner/work/neo-go/neo-go/pkg/neotest/basic.go:291 +0x85
2022-05-06T06:51:33.4001062Z   github.com/nspcc-dev/neo-go/pkg/neotest.(*Executor).SignTx()
2022-05-06T06:51:33.4001509Z       /home/runner/work/neo-go/neo-go/pkg/neotest/basic.go:111 +0x109
2022-05-06T06:51:33.4001885Z   github.com/nspcc-dev/neo-go/pkg/neotest.(*Executor).PrepareInvocation()
2022-05-06T06:51:33.4002435Z       /home/runner/work/neo-go/neo-go/pkg/neotest/basic.go:191 +0x1b2
2022-05-06T06:51:33.4002808Z   github.com/nspcc-dev/neo-go/pkg/neotest.(*Executor).InvokeScript()
2022-05-06T06:51:33.4003249Z       /home/runner/work/neo-go/neo-go/pkg/neotest/basic.go:177 +0xed
2022-05-06T06:51:33.4003685Z   github.com/nspcc-dev/neo-go/pkg/core/native/native_test_test.TestNEO_GetCandidates.func2()
2022-05-06T06:51:33.4004216Z       /home/runner/work/neo-go/neo-go/pkg/core/native/native_test/neo_test.go:549 +0x4cb
2022-05-06T06:51:33.4004634Z   github.com/nspcc-dev/neo-go/pkg/core/native/native_test_test.TestNEO_GetCandidates()
2022-05-06T06:51:33.4005165Z       /home/runner/work/neo-go/neo-go/pkg/core/native/native_test/neo_test.go:558 +0x1bbb
2022-05-06T06:51:33.4005298Z   testing.tRunner()
2022-05-06T06:51:33.4005674Z       /opt/hostedtoolcache/go/1.17.9/x64/src/testing/testing.go:1259 +0x22f
2022-05-06T06:51:33.4005916Z   testing.(*T).Run·dwrap·21()
2022-05-06T06:51:33.4006298Z       /opt/hostedtoolcache/go/1.17.9/x64/src/testing/testing.go:1306 +0x47
...
```
 2022-05-06 13:46:17 +03:00
Elizaveta Chichindaeva
28908aa3cf [#2442] English Check 
Signed-off-by: Elizaveta Chichindaeva <elizaveta@nspcc.ru>
 2022-05-04 19:48:27 +03:00
Anna Shaleva
a6a0c1eb12 core: avoid lock copy in private DAO constructor 
Fix the following linter warning:
```
pkg/core/dao/dao.go:101:7  govet  copylocks: assignment copies lock value to *d: github.com/nspcc-dev/neo-go/pkg/core/dao.Simple contains sync.RWMutex
```
 2022-04-29 16:10:04 +03:00
Anna Shaleva
8d2d48f360 core: move native cache from MemCachedStore to DAO 2022-04-29 16:10:04 +03:00
Anna Shaleva
4254407a9b dao: add GetTxExecResult method 2022-04-05 10:36:50 +03:00
Anna Shaleva
18c5f638b9 dao: adjust usages of Internal DB inconsistency error 2022-04-04 19:16:58 +03:00
Anna Shaleva
6343720adf dao: return ErrKeyNotFound from GetAppExecResults for dummy txs 
Otherwise decoding error may be returned which can be misleading.
 2022-04-04 12:49:52 +03:00
Roman Khimov
c12a3b71d4 dao: drop GetStorageItems* APIs 
They're just adding another useless caching layer to the Seek.
 2022-03-31 19:18:51 +03:00
Roman Khimov
5616585697 block/dao: simplify trimming, avoid allocations 
The only user of (*Block).Trim() is in DAO and it already has a nice buffer
usually, so creating another one makes no sense. It also simplifies error
handling a lot.
 2022-03-18 10:49:25 +03:00
Anna Shaleva
9adcefc2ef core: gracefully wrap Seek error if failed to retrieve header hases 2022-02-28 18:49:18 +03:00
Roman Khimov
7d6f087337 storage: drop (KeyPrefix).Bytes() API 
It allocates and most of the time we can avoid that.
 2022-02-18 15:19:57 +03:00
Roman Khimov
7223caf369 dao: improve PutCurrentHeader logic 
Move serialization out of the core.
 2022-02-18 15:05:25 +03:00
Roman Khimov
d2db58d748 dao: move header hash store logic out of the core 
Which allows for more efficient buffer use along the way.
 2022-02-18 14:54:05 +03:00
Roman Khimov
de2579ec07 dao: put contract IDs into keys using big endianness 
We don't have a need to iterate over them at the moment, but since we're
changing the DB format in the next release anyway let's add this ability also,
just in case.
 2022-02-18 14:38:51 +03:00
Roman Khimov
600da6909c storage: put uint32 into keys using in big endianness 
Which allows to iterate over the contents easily.
 2022-02-18 14:35:17 +03:00
Roman Khimov
1ca918e631 dao: delay buffer creation until it's needed 
Verification contexts don't ever touch the storage, so these allocations can
be avoided for them.
 2022-02-18 14:24:45 +03:00
Roman Khimov
e864768c88 dao: simplify NewPrivate 2022-02-18 14:18:56 +03:00
Roman Khimov
b60d4ff191 dao: deduplicate header->KV conversion 2022-02-18 14:12:44 +03:00
Roman Khimov
d8cf879499 dao: deduplicate DeleteBlock, no functional changes 2022-02-18 14:12:44 +03:00
Roman Khimov
f80680187e storage: expose private storage map for more efficient MPT batch 
It couldn't be done previously with two maps and mixed storage, but now all of
the storage changes are located in a single map, so it's trivial to do exact
slice allocations and avoid string->[]byte conversions.
 2022-02-17 23:41:10 +03:00
Roman Khimov
7dc8fc443f dao: simplify buffer management for private DAO 
Private DAO is only used in a single thread which means we can safely reuse
key/data buffers most of the time and handle it all in DAO.

Doesn't affect any benchmarks.
 2022-02-17 22:27:39 +03:00
Roman Khimov
9bfb3357f2 storage: add "private" mode to MemCachedStore 
Most of the time we don't need locking on the higher-level stores and we drop
them after Persist, so that's what private MemCachedStore is for.

It doesn't improve things in any noticeable way, some ~1% can be observed in
neo-bench under various loads and even less than that in chain processing. But
it seems to be a bit better anyway (less allocations, less locks).
 2022-02-17 22:27:39 +03:00
Roman Khimov
aefb26255a dao: drop DAO interface 
It's a remnant from the days when we had Simple and Cached DAO
implementations, now it makes zero sense.
 2022-02-16 18:24:20 +03:00
Roman Khimov
9d2ef775cf storage: simplify (*MemCachedStore).Put/Delete interface 
They never return errors, so their interface should reflect that. This allows
to remove quite a lot of useless and never tested code.

Notice that Get still does return an error. It can be made not to do that, but
usually we need to differentiate between successful/unsuccessful accesses
anyway, so this doesn't help much.
 2022-02-16 18:24:20 +03:00
Roman Khimov
017795c9c1 storage: completely remove MemoryBatch 
If you need something like that, just wrap another MemCachedStore layer around
it.
 2022-02-16 16:13:12 +03:00
Anna Shaleva
9b841b9b8f core, rpc: use Seek to iterate over NEP* transfers 
The results are controversial a bit. MemoryPS is a special storage
and the new approach doesn't help it to iterate through NEP17 transfers.
However, on long distances (if transfers are requested for more than
1000 blocks, which is ~4.1 hours of mainnet chain) both LevelDB and
BoltDB perform good enough with the new approach. Taking into account
the fact that default value for the query period of `getnep17transfers`
RPC handler is a week (~40K mainnet blocks) we can sacrifice MemoryPS
performance in favour of BoltDB and LevelDB optimisation.

Close #2263.

Benchmark results:

name                                                                           old time/op    new time/op    delta
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take100Blocks-8           783µs ±13%    1762µs ± 4%  +125.12%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take1000Blocks-8         6.91ms ± 2%    9.00ms ± 2%   +30.28%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take100Blocks-8        1.43ms ± 8%    1.79ms ± 4%   +24.93%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take1000Blocks-8       7.78ms ± 3%    8.93ms ± 2%   +14.78%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take100Blocks-8       7.69ms ± 3%    1.73ms ±10%   -77.50%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take1000Blocks-8      14.1ms ± 2%     9.0ms ± 2%   -36.53%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take100Blocks-8          768µs ± 3%     801µs ± 2%    +4.24%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take1000Blocks-8        8.03ms ± 2%    8.05ms ± 8%      ~     (p=0.436 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take100Blocks-8       1.70ms ±16%    0.85ms ± 7%   -49.85%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take1000Blocks-8      10.8ms ± 2%     8.1ms ± 2%   -25.21%  (p=0.000 n=10+8)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take100Blocks-8      10.8ms ± 2%     0.9ms ± 7%   -92.12%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take1000Blocks-8     18.2ms ±13%     8.2ms ± 6%   -54.95%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take100Blocks-8         874µs ± 6%     823µs ± 2%    -5.81%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take1000Blocks-8       9.35ms ± 2%    8.14ms ± 2%   -12.91%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take100Blocks-8      1.85ms ± 4%    0.89ms ±10%   -51.68%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take1000Blocks-8     10.6ms ± 4%     8.2ms ± 2%   -22.44%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take100Blocks-8     10.7ms ± 2%     0.9ms ± 2%   -91.90%  (p=0.000 n=8+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take1000Blocks-8    21.8ms ±15%     8.2ms ± 1%   -62.25%  (p=0.000 n=10+10)

name                                                                           old alloc/op   new alloc/op   delta
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take100Blocks-8           650kB ± 0%    1010kB ± 7%   +55.45%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take1000Blocks-8         6.39MB ± 0%    9.89MB ± 1%   +54.74%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take100Blocks-8        1.28MB ± 0%    1.14MB ± 0%   -11.25%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take1000Blocks-8       7.02MB ± 0%   10.01MB ± 0%   +42.54%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take100Blocks-8       7.02MB ± 0%    1.08MB ± 0%   -84.64%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take1000Blocks-8      12.8MB ± 0%    10.0MB ± 0%   -22.04%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take100Blocks-8          823kB ± 3%     866kB ± 5%    +5.19%  (p=0.001 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take1000Blocks-8        9.92MB ± 0%    9.85MB ± 0%    -0.71%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take100Blocks-8       1.84MB ± 4%    1.01MB ± 5%   -44.75%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take1000Blocks-8      11.0MB ± 0%    10.0MB ± 1%    -8.45%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take100Blocks-8      11.0MB ± 0%     1.0MB ± 1%   -90.55%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take1000Blocks-8     20.0MB ± 0%    10.1MB ± 0%   -49.69%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take100Blocks-8         913kB ± 5%     907kB ± 6%      ~     (p=0.497 n=9+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take1000Blocks-8       10.0MB ± 1%    10.0MB ± 1%    -0.63%  (p=0.001 n=10+8)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take100Blocks-8      1.92MB ± 2%    1.04MB ± 0%   -45.53%  (p=0.000 n=9+8)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take1000Blocks-8     11.1MB ± 1%    10.1MB ± 0%    -9.22%  (p=0.000 n=10+7)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take100Blocks-8     11.1MB ± 1%     1.0MB ± 0%   -90.61%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take1000Blocks-8    20.4MB ± 1%    10.1MB ± 0%   -50.46%  (p=0.000 n=10+10)

name                                                                           old allocs/op  new allocs/op  delta
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take100Blocks-8           11.1k ± 0%     11.7k ± 0%    +5.35%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take1000Blocks-8           110k ± 0%      110k ± 0%    +0.55%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take100Blocks-8         22.0k ± 0%     11.9k ± 0%   -46.14%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take1000Blocks-8         120k ± 0%      110k ± 0%    -8.44%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take100Blocks-8         120k ± 0%       12k ± 0%   -90.36%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take1000Blocks-8        219k ± 0%      110k ± 0%   -49.73%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take100Blocks-8          11.3k ± 0%     11.2k ± 0%    -1.06%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take1000Blocks-8          112k ± 0%      110k ± 0%    -2.36%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take100Blocks-8        22.5k ± 0%     11.3k ± 0%   -49.65%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take1000Blocks-8        124k ± 0%      110k ± 0%   -11.08%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take100Blocks-8        124k ± 0%       11k ± 0%   -90.84%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take1000Blocks-8       225k ± 0%      110k ± 0%   -51.07%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take100Blocks-8         11.4k ± 0%     11.3k ± 0%    -1.36%  (p=0.000 n=9+9)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take1000Blocks-8         114k ± 0%      111k ± 0%    -2.33%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take100Blocks-8       22.7k ± 0%     11.5k ± 0%   -49.56%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take1000Blocks-8       125k ± 0%      111k ± 0%   -11.12%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take100Blocks-8       125k ± 0%       11k ± 0%   -90.82%  (p=0.000 n=8+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take1000Blocks-8      229k ± 1%      111k ± 0%   -51.42%  (p=0.000 n=10+10)
 2022-01-19 20:55:08 +03:00
Anna Shaleva
cd42b8b20c core: allow early Seek stop 
This simple approach allows to improve the performance of
BoltDB and LevelDB in both terms of speed and allocations
for retrieving GasPerVote value from the storage.
MemoryPS's speed suffers a bit, but we don't use it for
production environment.

Part of #2322.

Benchmark results:

name                                                              old time/op    new time/op    delta
NEO_GetGASPerVote/MemPS_10RewardRecords_1RewardDistance-8           25.3µs ± 1%    26.4µs ± 9%   +4.41%  (p=0.043 n=10+9)
NEO_GetGASPerVote/MemPS_10RewardRecords_10RewardDistance-8          27.9µs ± 1%    30.1µs ±15%   +7.97%  (p=0.000 n=10+9)
NEO_GetGASPerVote/MemPS_10RewardRecords_100RewardDistance-8         55.1µs ± 1%    60.2µs ± 7%   +9.27%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_10RewardRecords_1000RewardDistance-8         353µs ± 2%     416µs ±13%  +17.88%  (p=0.000 n=8+8)
NEO_GetGASPerVote/MemPS_100RewardRecords_1RewardDistance-8           195µs ± 1%     216µs ± 7%  +10.42%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_100RewardRecords_10RewardDistance-8          200µs ± 4%     214µs ± 9%   +6.99%  (p=0.002 n=9+8)
NEO_GetGASPerVote/MemPS_100RewardRecords_100RewardDistance-8         223µs ± 2%     247µs ± 9%  +10.60%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_100RewardRecords_1000RewardDistance-8        612µs ±23%     855µs ±52%  +39.60%  (p=0.001 n=9+10)
NEO_GetGASPerVote/MemPS_1000RewardRecords_1RewardDistance-8         11.3ms ±53%    10.7ms ±50%     ~     (p=0.739 n=10+10)
NEO_GetGASPerVote/MemPS_1000RewardRecords_10RewardDistance-8        12.0ms ±37%    10.4ms ±65%     ~     (p=0.853 n=10+10)
NEO_GetGASPerVote/MemPS_1000RewardRecords_100RewardDistance-8       11.3ms ±40%    10.4ms ±49%     ~     (p=0.631 n=10+10)
NEO_GetGASPerVote/MemPS_1000RewardRecords_1000RewardDistance-8      3.80ms ±45%    3.69ms ±27%     ~     (p=0.931 n=6+5)
NEO_GetGASPerVote/BoltPS_10RewardRecords_1RewardDistance-8          23.0µs ± 9%    22.6µs ± 4%     ~     (p=0.059 n=8+9)
NEO_GetGASPerVote/BoltPS_10RewardRecords_10RewardDistance-8         25.9µs ± 5%    24.8µs ± 4%   -4.17%  (p=0.006 n=10+8)
NEO_GetGASPerVote/BoltPS_10RewardRecords_100RewardDistance-8        42.7µs ±13%    38.9µs ± 1%   -8.85%  (p=0.000 n=9+8)
NEO_GetGASPerVote/BoltPS_10RewardRecords_1000RewardDistance-8       80.8µs ±12%    84.9µs ± 9%     ~     (p=0.114 n=8+9)
NEO_GetGASPerVote/BoltPS_100RewardRecords_1RewardDistance-8         64.3µs ±16%    22.1µs ±23%  -65.64%  (p=0.000 n=10+10)
NEO_GetGASPerVote/BoltPS_100RewardRecords_10RewardDistance-8        61.0µs ±34%    23.2µs ± 8%  -62.04%  (p=0.000 n=10+9)
NEO_GetGASPerVote/BoltPS_100RewardRecords_100RewardDistance-8       62.2µs ±14%    25.7µs ±13%  -58.66%  (p=0.000 n=9+10)
NEO_GetGASPerVote/BoltPS_100RewardRecords_1000RewardDistance-8       359µs ±60%     325µs ±60%     ~     (p=0.739 n=10+10)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_1RewardDistance-8         242µs ±21%      13µs ±28%  -94.49%  (p=0.000 n=10+8)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_10RewardDistance-8        229µs ±23%      18µs ±70%  -92.02%  (p=0.000 n=10+9)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_100RewardDistance-8       238µs ±28%     20µs ±109%  -91.38%  (p=0.000 n=10+9)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_1000RewardDistance-8      265µs ±20%      77µs ±62%  -71.04%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_10RewardRecords_1RewardDistance-8         25.5µs ± 3%    24.7µs ± 7%     ~     (p=0.143 n=10+10)
NEO_GetGASPerVote/LevelPS_10RewardRecords_10RewardDistance-8        27.4µs ± 2%    27.9µs ± 6%     ~     (p=0.280 n=10+10)
NEO_GetGASPerVote/LevelPS_10RewardRecords_100RewardDistance-8       50.2µs ± 7%    47.4µs ±10%     ~     (p=0.156 n=9+10)
NEO_GetGASPerVote/LevelPS_10RewardRecords_1000RewardDistance-8      98.2µs ± 9%    94.6µs ±10%     ~     (p=0.218 n=10+10)
NEO_GetGASPerVote/LevelPS_100RewardRecords_1RewardDistance-8        82.9µs ±13%    32.1µs ±22%  -61.30%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_100RewardRecords_10RewardDistance-8       92.2µs ±11%    33.7µs ±12%  -63.42%  (p=0.000 n=10+9)
NEO_GetGASPerVote/LevelPS_100RewardRecords_100RewardDistance-8      88.3µs ±22%    39.4µs ±14%  -55.36%  (p=0.000 n=10+9)
NEO_GetGASPerVote/LevelPS_100RewardRecords_1000RewardDistance-8      106µs ±18%      78µs ±24%  -26.20%  (p=0.000 n=9+10)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_1RewardDistance-8        360µs ±24%      29µs ±53%  -91.91%  (p=0.000 n=10+9)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_10RewardDistance-8       353µs ±16%      50µs ±70%  -85.72%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_100RewardDistance-8      381µs ±20%     47µs ±111%  -87.64%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_1000RewardDistance-8     434µs ±19%     113µs ±41%  -74.04%  (p=0.000 n=10+10)

name                                                              old alloc/op   new alloc/op   delta
NEO_GetGASPerVote/MemPS_10RewardRecords_1RewardDistance-8           4.82kB ± 0%    4.26kB ± 1%  -11.62%  (p=0.000 n=10+9)
NEO_GetGASPerVote/MemPS_10RewardRecords_10RewardDistance-8          4.99kB ± 0%    4.41kB ± 1%  -11.56%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_10RewardRecords_100RewardDistance-8         8.45kB ± 0%    7.87kB ± 0%   -6.88%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_10RewardRecords_1000RewardDistance-8        55.0kB ± 0%    54.5kB ± 0%   -0.81%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_100RewardRecords_1RewardDistance-8          29.1kB ± 0%    21.7kB ± 2%  -25.56%  (p=0.000 n=9+9)
NEO_GetGASPerVote/MemPS_100RewardRecords_10RewardDistance-8         29.3kB ± 1%    21.8kB ± 2%  -25.74%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_100RewardRecords_100RewardDistance-8        31.3kB ± 1%    23.6kB ± 1%  -24.50%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_100RewardRecords_1000RewardDistance-8       92.5kB ± 5%    84.7kB ± 3%   -8.50%  (p=0.000 n=10+9)
NEO_GetGASPerVote/MemPS_1000RewardRecords_1RewardDistance-8          324kB ±29%     222kB ±44%  -31.33%  (p=0.007 n=10+10)
NEO_GetGASPerVote/MemPS_1000RewardRecords_10RewardDistance-8         308kB ±32%     174kB ±14%  -43.56%  (p=0.000 n=10+8)
NEO_GetGASPerVote/MemPS_1000RewardRecords_100RewardDistance-8        298kB ±23%     178kB ±36%  -40.26%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_1000RewardRecords_1000RewardDistance-8       362kB ± 6%     248kB ± 6%  -31.54%  (p=0.004 n=6+5)
NEO_GetGASPerVote/BoltPS_10RewardRecords_1RewardDistance-8          5.15kB ± 3%    4.64kB ± 2%   -9.92%  (p=0.000 n=10+9)
NEO_GetGASPerVote/BoltPS_10RewardRecords_10RewardDistance-8         5.36kB ± 1%    4.75kB ± 5%  -11.42%  (p=0.000 n=10+10)
NEO_GetGASPerVote/BoltPS_10RewardRecords_100RewardDistance-8        8.15kB ± 4%    7.53kB ± 1%   -7.62%  (p=0.000 n=10+9)
NEO_GetGASPerVote/BoltPS_10RewardRecords_1000RewardDistance-8       33.2kB ± 5%    33.2kB ± 7%     ~     (p=0.829 n=8+10)
NEO_GetGASPerVote/BoltPS_100RewardRecords_1RewardDistance-8         20.1kB ± 7%     5.8kB ±13%  -70.90%  (p=0.000 n=10+10)
NEO_GetGASPerVote/BoltPS_100RewardRecords_10RewardDistance-8        19.8kB ±14%     6.2kB ± 5%  -68.87%  (p=0.000 n=10+9)
NEO_GetGASPerVote/BoltPS_100RewardRecords_100RewardDistance-8       21.7kB ± 6%     8.0kB ± 7%  -63.20%  (p=0.000 n=9+10)
NEO_GetGASPerVote/BoltPS_100RewardRecords_1000RewardDistance-8      98.5kB ±44%    81.8kB ±48%     ~     (p=0.143 n=10+10)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_1RewardDistance-8         130kB ± 4%       4kB ± 9%  -96.69%  (p=0.000 n=10+10)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_10RewardDistance-8        131kB ± 4%       5kB ±21%  -96.48%  (p=0.000 n=9+9)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_100RewardDistance-8       132kB ± 4%       6kB ±10%  -95.39%  (p=0.000 n=10+8)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_1000RewardDistance-8      151kB ± 4%      26kB ±10%  -82.46%  (p=0.000 n=9+9)
NEO_GetGASPerVote/LevelPS_10RewardRecords_1RewardDistance-8         5.92kB ± 3%    5.32kB ± 2%  -10.01%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_10RewardRecords_10RewardDistance-8        6.09kB ± 2%    5.48kB ± 2%  -10.00%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_10RewardRecords_100RewardDistance-8       9.61kB ± 1%    9.00kB ± 0%   -6.29%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_10RewardRecords_1000RewardDistance-8      33.4kB ± 7%    32.2kB ± 5%   -3.60%  (p=0.037 n=10+10)
NEO_GetGASPerVote/LevelPS_100RewardRecords_1RewardDistance-8        22.3kB ±10%     9.0kB ±16%  -59.78%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_100RewardRecords_10RewardDistance-8       23.6kB ± 6%     8.5kB ±20%  -63.76%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_100RewardRecords_100RewardDistance-8      24.2kB ± 9%    11.5kB ± 4%  -52.34%  (p=0.000 n=10+8)
NEO_GetGASPerVote/LevelPS_100RewardRecords_1000RewardDistance-8     44.2kB ± 6%    30.8kB ± 9%  -30.24%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_1RewardDistance-8        144kB ± 4%      10kB ±24%  -93.39%  (p=0.000 n=9+10)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_10RewardDistance-8       146kB ± 1%      11kB ±37%  -92.14%  (p=0.000 n=7+10)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_100RewardDistance-8      149kB ± 3%      11kB ±12%  -92.28%  (p=0.000 n=10+9)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_1000RewardDistance-8     171kB ± 4%      34kB ±12%  -80.00%  (p=0.000 n=10+10)

name                                                              old allocs/op  new allocs/op  delta
NEO_GetGASPerVote/MemPS_10RewardRecords_1RewardDistance-8             95.0 ± 0%      74.0 ± 0%  -22.11%  (p=0.001 n=8+9)
NEO_GetGASPerVote/MemPS_10RewardRecords_10RewardDistance-8             100 ± 0%        78 ± 1%  -21.70%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_10RewardRecords_100RewardDistance-8            153 ± 0%       131 ± 2%  -14.25%  (p=0.000 n=6+10)
NEO_GetGASPerVote/MemPS_10RewardRecords_1000RewardDistance-8           799 ± 2%       797 ± 4%     ~     (p=0.956 n=10+10)
NEO_GetGASPerVote/MemPS_100RewardRecords_1RewardDistance-8             438 ± 6%       167 ± 0%  -61.86%  (p=0.000 n=10+9)
NEO_GetGASPerVote/MemPS_100RewardRecords_10RewardDistance-8            446 ± 5%       172 ± 0%  -61.38%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_100RewardRecords_100RewardDistance-8           506 ± 4%       232 ± 1%  -54.21%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_100RewardRecords_1000RewardDistance-8        1.31k ± 5%     0.97k ± 4%  -26.20%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_1000RewardRecords_1RewardDistance-8          5.06k ± 1%     1.09k ± 2%  -78.53%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_1000RewardRecords_10RewardDistance-8         5.02k ± 3%     1.08k ± 0%  -78.45%  (p=0.000 n=10+8)
NEO_GetGASPerVote/MemPS_1000RewardRecords_100RewardDistance-8        5.09k ± 3%     1.15k ± 2%  -77.48%  (p=0.000 n=10+10)
NEO_GetGASPerVote/MemPS_1000RewardRecords_1000RewardDistance-8       5.83k ± 1%     1.87k ± 3%  -68.02%  (p=0.004 n=6+5)
NEO_GetGASPerVote/BoltPS_10RewardRecords_1RewardDistance-8             103 ± 2%        82 ± 1%  -20.83%  (p=0.000 n=10+10)
NEO_GetGASPerVote/BoltPS_10RewardRecords_10RewardDistance-8            107 ± 0%        86 ± 0%  -19.63%  (p=0.000 n=8+8)
NEO_GetGASPerVote/BoltPS_10RewardRecords_100RewardDistance-8           164 ± 1%       139 ± 0%  -15.45%  (p=0.000 n=10+9)
NEO_GetGASPerVote/BoltPS_10RewardRecords_1000RewardDistance-8          820 ± 1%       789 ± 1%   -3.70%  (p=0.000 n=9+10)
NEO_GetGASPerVote/BoltPS_100RewardRecords_1RewardDistance-8            475 ± 0%        94 ± 3%  -80.15%  (p=0.000 n=10+9)
NEO_GetGASPerVote/BoltPS_100RewardRecords_10RewardDistance-8           481 ± 0%       100 ± 2%  -79.26%  (p=0.000 n=9+9)
NEO_GetGASPerVote/BoltPS_100RewardRecords_100RewardDistance-8          549 ± 0%       161 ± 2%  -70.69%  (p=0.000 n=10+10)
NEO_GetGASPerVote/BoltPS_100RewardRecords_1000RewardDistance-8       1.61k ±19%     1.19k ±25%  -26.05%  (p=0.000 n=10+10)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_1RewardDistance-8         4.12k ± 0%     0.08k ± 2%  -98.02%  (p=0.000 n=10+10)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_10RewardDistance-8        4.14k ± 0%     0.09k ± 3%  -97.90%  (p=0.000 n=9+9)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_100RewardDistance-8       4.19k ± 0%     0.15k ± 3%  -96.52%  (p=0.000 n=9+9)
NEO_GetGASPerVote/BoltPS_1000RewardRecords_1000RewardDistance-8      4.82k ± 1%     0.74k ± 1%  -84.58%  (p=0.000 n=10+9)
NEO_GetGASPerVote/LevelPS_10RewardRecords_1RewardDistance-8            112 ± 4%        90 ± 3%  -19.45%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_10RewardRecords_10RewardDistance-8           116 ± 2%        95 ± 2%  -17.90%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_10RewardRecords_100RewardDistance-8          170 ± 3%       148 ± 3%  -12.99%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_10RewardRecords_1000RewardDistance-8         800 ± 2%       772 ± 2%   -3.50%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_100RewardRecords_1RewardDistance-8           480 ± 3%       118 ± 3%  -75.32%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_100RewardRecords_10RewardDistance-8          479 ± 2%       123 ± 3%  -74.33%  (p=0.000 n=10+9)
NEO_GetGASPerVote/LevelPS_100RewardRecords_100RewardDistance-8         542 ± 1%       183 ± 3%  -66.34%  (p=0.000 n=10+9)
NEO_GetGASPerVote/LevelPS_100RewardRecords_1000RewardDistance-8      1.19k ± 1%     0.79k ± 1%  -33.41%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_1RewardDistance-8        4.21k ± 1%     0.13k ±21%  -96.83%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_10RewardDistance-8       4.23k ± 1%     0.15k ±17%  -96.48%  (p=0.000 n=10+10)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_100RewardDistance-8      4.27k ± 0%     0.19k ± 6%  -95.51%  (p=0.000 n=10+9)
NEO_GetGASPerVote/LevelPS_1000RewardRecords_1000RewardDistance-8     4.89k ± 1%     0.79k ± 2%  -83.80%  (p=0.000 n=10+10)
 2022-01-19 20:54:35 +03:00
AnnaShaleva
6bc92abe19 storage: allow to seek starting from some point 2022-01-13 12:44:29 +03:00
Roman Khimov
4c39b6600d *: store application long along with tx/block 
Two times less keys inserted into the DB per tx leads to ~13% TPS
improvement. We also drop one goroutine with it which isn't bad as well.
 2021-12-09 15:39:26 +03:00
Evgeniy Stratonikov
582d489c90 dao: add P2PStateExchangeExtensions setting to dao.Version 
Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
 2021-11-24 16:22:27 +03:00
Evgeniy Stratonikov
f1767f361d dao: add KeepOnlyLatestState setting to dao.Version 
Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
 2021-11-24 16:22:27 +03:00
Evgeniy Stratonikov
f7e2d3d717 dao: add stateroot-related settings to Version 
Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
 2021-11-24 16:22:27 +03:00
Evgeniy Stratonikov
6c5a7d9b29 dao: include settings in Version 
Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
 2021-11-24 16:22:26 +03:00
Evgeniy Stratonikov
856385b106 dao: use custom storage prefix 
We use 2 prefixes for storing items because of state synchronization.
This commit allows to parametrize dao with the default prefix.

Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
 2021-11-24 16:22:07 +03:00
Roman Khimov
5fbe838fd4 core: add and use synchronous persist to avoid OOM 
b9be892bf9 has made Persist asynchronous which
is very effective in allowing the system to continue processing
blocks/transactions while flushing things to disk. It at the same time is very
dangerous in that if the disk is slow and it takes much time to flush KV set
(more than persisting interval), there might be even bigger new KV set in
MemCachedStore by the time it finishes. Even if the system immediately starts
to flush this new data set it (being bigger) can take more time than the
previous one. And while doing so a new data set will appear in memory,
potentially again bigger than this.

So we can easily end up with the system going out of control, consuming more
and more memory and taking more and more time to persist a single set of
data. To avoid this we need to detect such condition and just wait for Persist
to really finish its job and release the resources.
 2021-11-22 10:41:40 +03:00
Roman Khimov
ce9d0b22cf *: use NEP-XX naming consistently in docs/comments 
Standards are NEP-11 and NEP-17, not NEP11, not NEP17, not anything
else. Variable/function names of course can use whatever fits, but documents
and comments should be consistent wrt this.
 2021-11-19 12:58:46 +03:00
Roman Khimov
125e4231b0 core: store NEP-11 transfers, add accessor functions 2021-11-18 00:09:10 +03:00
Roman Khimov
095ed3f64e dao: drop unused AppendNEP17Transfer() 2021-11-16 22:51:04 +03:00
Roman Khimov
c63aeb38bb state: prepare for NEP-11 data tracking, refactor/rename 
There is a lot of similarity, so try reusing common code and use more neutral
naming.
 2021-11-16 19:18:06 +03:00
Anna Shaleva
3450371910 core: split (*MemCachedStore) Seek and SeekAsync methods 
Use SeekAsync for System.Storage.Find and Seek for the rest of cases.
 2021-10-21 10:05:12 +03:00
Anna Shaleva
0a4f45c9b0 core: add ability to free storage.Iterator resources 2021-10-21 10:05:12 +03:00
Anna Shaleva
89ee2e7720 core: refactor storage.Find and storage.Iterator to work with channel 
Add SeekAsync methods in order to fetch matching storage items
on demand. Refactor storage.Find and storage.Iterator wrt these changes.
 2021-10-21 10:05:12 +03:00
Anna Shaleva
f2ac07a3c0 core: do not copy key/value results got from MemCachedStore.Seek 
They are already copied inside the MemCachedStore.Seek, so that
persistent storage  can't change them anymore.
 2021-10-21 10:05:12 +03:00
Anna Shaleva
72726d46d3 core: refactor callers of MemCachedStore.Seek 
MemCachedStore.Seek now sorts results, so its callers may omit sorting.
 2021-10-21 10:05:12 +03:00