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
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
c4ee310e85
mpt: modify refcounted storage scheme to make GC possible
...
Add "active" flag into the node data and make the remainder modal, for active
nodes it's a reference counter, for inactive ones the deactivation height is
stored.
Technically, refcounted chains storing just one trie don't need a flag, but
it's a bit simpler this way.
2022-02-10 21:56:20 +03:00
Roman Khimov
86cb4ed80f
mpt: add the notion of MPT mode
...
It directly affects the storage format, so it's important. ModeGC is not used
at the moment, but defined for future extensibility.
2022-02-10 19:15:18 +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
Roman Khimov
9c8ba5777e
Merge pull request #2323 from nspcc-dev/drop-blockchainer
...
Reduce blockchainer.Blockchainer use
2022-01-14 20:47:26 +03:00
Roman Khimov
077d5ccb03
core: drop dangerous methods from blockchainer.StateRoot
...
CleanStorage and UpdateStateValidators should only be availabe to appropriate
core modules.
2022-01-14 19:57:16 +03:00
Roman Khimov
380e706255
core/state*: drop blockchainer.Blockchainer use
2022-01-14 19:57:16 +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
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
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
Anna Shaleva
43ac4e1517
rpc: implement findstates
RPC handler
2021-10-13 11:41:05 +03:00
Anna Shaleva
0aedfd0038
core: fix bug in MPT pool during Update
...
We need to copy the result of `TryGet` method, otherwice the slice can
be modified inside `Add` or `Update` methods, which leads to
inconsistent MPT pool state.
2021-09-07 19:43:27 +03:00
Anna Shaleva
36808b8904
core: clone MPT node while restoring it multiple times
...
We need this to avoid collapse collisions. Example of such collapse
described in
https://github.com/nspcc-dev/neo-go/pull/2019#discussion_r689629704 .
2021-09-07 19:43:27 +03:00
Anna Shaleva
0e0b55350a
core: convert (*Blockchain).JumpToState to a callback
...
We don't need this method to be exposed, the only its user is the
StateSync module. At the same time StateSync module manages its state by
itself which guarantees that (*Blockchain).jumpToState will be called
with proper StateSync stage.
2021-09-07 19:43:27 +03:00
Anna Shaleva
51f405471e
core: remove outdated blocks/txs/AERs/MPT nodes during state sync
...
Before state sync process can be started, outdated MPT nodes
should be removed from storage. After state sync is completed,
outdated blocks/transactions/AERs should also be removed.
2021-09-07 19:43:27 +03:00
Anna Shaleva
a276a85b72
core: unify code of state sync module initialization
2021-09-07 19:43:27 +03:00
Anna Shaleva
3b7807e897
network: request unknown MPT nodes
...
In this commit:
1. Request unknown MPT nodes from peers. Note, that StateSync module itself
shouldn't be responsible for nodes requests, that's a server duty.
2. Do not request the same node twice, check if it is in storage
already. If so, then the only thing remaining is to update refcounter.
2021-09-07 19:43:27 +03:00
Anna Shaleva
d67ff30704
core: implement statesync module
...
And support GetMPTData and MPTData P2P commands.
2021-09-07 19:43:27 +03:00