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lz4+zstd compression #6365
lz4+zstd compression #6365
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* chore: Upgrade rust-rocksdb 0.16 to 0.18 * zlib causes a linker failure in librocksdb_sys * . * . * Disable bzip2 feature * fmt
Could we get the table as text rather than an image? Text will for sure stay in the commit message while the image link may break in the future. |
Just updated the numbers let me transform them to text. |
I’ve taken the liberty of reformatting it a little (aligning decimal point, removing GB). One issue is that the percentages are calculated incorrectly. They are calculated as |
I'm not sure what is right here. I thoughts of the fraction of saved space. I added performance tests as well. |
If an item which normally costs 10 dollars is on sale and is 10% off that means it’s now 9 dollars. Similarly, if you have a file which is 10 GB and by compressing it you save 10% you end up with 9 GB file. The ratios should always be against the old value. |
This is commit 0197c40 upstream. * Replace default Snappy compression in RocksDB with lz4 on all levels except of bottommost which is zstd. We aren't going to do the recompression the nodes explicitly. We expect RPC nodes to be almost fully updated in 5 epochs. For archival nodes we don't have estimation on the part of the data to be recompressed over time. Later on if it becomes critical we'll probably make it possible in the CLI to recompress the whole DB in place. Experimentation was done in the following manner: We read all key/value pair from the store and wrote them in a new store for both the current compression algo (snappy) and lz4+zstd. All sizes in GB. ______RPC node from scratch______ ______Archival node from backup_____ 0 ColDbVersion 0.00 0.00 0.00 -7.12% 0.00 0.00 0.00 -5.16% 1 ColBlockMisc 0.00 0.00 0.00 64.66% 0.00 0.00 0.00 83.78% 2 ColBlock 0.83 0.76 0.07 8.71% 129.74 116.06 13.68 11.79% 3 ColBlockHeader 108.79 108.90 -0.10 -0.09% 106.62 106.71 -0.10 -0.09% 4 ColBlockHeight 1.62 1.48 0.14 9.44% 1.57 1.43 0.14 9.49% 5 ColState 27.62 22.53 5.09 22.58% 348.80 295.61 53.20 18.00% 6 ColChunkExtra 0.05 0.09 -0.04 -40.59% 6.47 5.79 0.68 11.83% 7 ColTransactionResult 1.89 1.59 0.30 18.83% 18.13 14.91 3.22 21.59% 8 ColOutgoingReceipts 1.02 0.89 0.12 13.97% 79.57 67.93 11.64 17.13% 9 ColIncomingReceipts 0.94 0.93 0.01 1.60% 83.07 70.38 12.68 18.02% 10 ColPeers 0.00 0.00 0.00 -33.65% 0.00 0.00 0.00 -8.83% 11 ColEpochInfo 0.01 0.02 -0.01 -67.64% 0.00 0.00 0.00 2.26% 12 ColBlockInfo 8.34 6.95 1.39 19.92% 8.23 6.91 1.32 19.07% 13 ColChunks 2.53 2.08 0.45 21.37% 199.69 165.51 34.18 20.65% 14 ColPartialChunks 21.14 18.02 3.13 17.35% 1634.03 1138.52 495.51 43.52% 15 ColBlocksToCatchup 0.00 0.00 0.00 0.00% 0.00 0.00 0.00 10.50% 16 ColStateDlInfos 0.00 0.00 0.00 0.00% 0.00 0.00 0.00 75561.59% 17 ColChallengedBlocks 0.00 0.00 0.00 0.00% 0.00 0.00 0.00 0.00% 18 ColStateHeaders 0.00 0.00 0.00 -21.17% 0.00 0.00 0.00 8.61% 19 ColInvalidChunks 0.00 0.00 0.00 0.00% 0.00 0.00 0.00 0.00% 20 ColBlockExtra 0.01 0.01 0.00 -31.27% 1.44 1.36 0.07 5.39% 21 ColBlockPerHeight 0.01 0.02 -0.01 -61.46% 2.94 2.11 0.84 39.65% 22 ColStateParts 2.09 4.49 -2.41 -53.56% 67.27 39.38 27.89 70.83% 23 ColEpochStart 0.00 0.00 0.00 -20.03% 0.00 0.00 0.00 2086.55% 24 ColAccountAnnouncements 0.00 0.00 0.00 -27.72% 0.00 0.00 0.00 28.02% 25 ColNextBlockHashes 2.96 2.77 0.19 6.74% 2.91 2.71 0.20 7.43% 26 ColEpochLightClientBlocks 0.00 0.00 0.00 -5.69% 0.01 0.00 0.00 38.29% 27 ColReceiptIdToShardId 0.11 0.15 -0.04 -26.61% 1.86 1.70 0.16 9.12% 28 _ColNextBlockWithNewChunk 0.00 0.00 0.00 0.00% 0.00 0.00 0.00 0.00% 29 _ColLastBlockWithNewChunk 0.00 0.00 0.00 0.00% 0.00 0.00 0.00 0.00% 30 ColPeerComponent 0.00 0.00 0.00 59.15% 0.00 0.00 0.00 950.57% 31 ColComponentEdges 0.06 0.03 0.03 98.83% 0.01 0.00 0.01 4094.76% 32 ColLastComponentNonce 0.00 0.00 0.00 89.72% 0.00 0.00 0.00 87.31% 33 ColTransactions 1.45 1.22 0.23 18.71% 103.24 82.58 20.66 25.02% 34 ColChunkPerHeightShard 0.03 0.06 -0.02 -40.11% 3.17 2.91 0.26 9.03% 35 ColStateChanges 1.55 1.37 0.18 13.51% 58.67 34.82 23.85 68.51% 36 ColBlockRefCount 0.01 0.01 0.00 -30.37% 1.48 1.36 0.12 8.62% 37 ColTrieChanges 29.74 16.93 12.82 75.72% 466.22 339.68 126.54 37.25% 38 ColBlockMerkleTree 17.02 12.72 4.30 33.77% 16.97 12.42 4.55 36.66% 39 ColChunkHashesByHeight 0.02 0.02 0.00 -2.57% 2.97 2.73 0.23 8.57% 40 ColBlockOrdinal 1.64 1.47 0.18 11.95% 1.58 1.42 0.16 11.24% 41 ColGCCount 0.00 0.00 0.00 27.82% 0.00 0.00 0.00 0.00% 42 ColOutcomeIds 0.17 0.17 0.00 -1.40% 3.95 3.73 0.22 5.85% 43 _ColTransactionRefCount 0.00 0.00 0.00 0.00% 0.00 0.00 0.00 0.00% 44 ColProcessedBlockHeights 0.00 0.00 0.00 -87.51% 0.17 0.13 0.04 28.28% 45 ColReceipts 1.04 0.87 0.17 19.63% 79.79 67.56 12.23 18.11% 46 ColCachedContractCode 15.57 8.28 7.29 88.10% 32.84 16.57 16.27 98.18% 47 ColEpochValidatorInfo 0.00 0.01 0.00 -52.36% 0.00 0.00 0.00 -1.57% 48 ColHeaderHashesByHeight 1.66 1.85 -0.19 -10.51% 1.47 1.31 0.16 12.08% 49 ColStateChangesForSplitStates 0 0 0.00 0.00% 0.00 0.00 0.00 0.00% _ sum 249.93 216.69 33.24 15.34% 3464.90 2604.28 860.62 33.05% Perf report: export CARGO_PROFILE_RELEASE_LTO=fat export CARGO_PROFILE_RELEASE_CODEGEN_UNITS=1 cargo build --release -p runtime-params-estimator 8 runs in 4 parallel threads: target/release/runtime-params-estimator --metric time --costs RocksDbReadValueByte,RocksDbInsertValueByte\ --home ~/.near: RocksDbInsertValueByte 4_015_512 gas [ 4ns ] (computed in 22.384337452s) RocksDbInsertValueByte 5_102_943 gas [ 5ns ] (computed in 23.08667252s) RocksDbInsertValueByte 6_050_856 gas [ 6ns ] (computed in 23.277226336s) RocksDbInsertValueByte 6_965_742 gas [ 6ns ] (computed in 23.63915479s) RocksDbInsertValueByte 7_975_674 gas [ 7ns ] (computed in 21.727054944s) RocksDbInsertValueByte 8_592_293 gas [ 8ns ] (computed in 23.341369568s) RocksDbInsertValueByte 9_545_668 gas [ 9ns ] (computed in 25.831370918s) RocksDbInsertValueByte 9_863_761 gas [ 9ns ] (computed in 24.980539953s) RocksDbReadValueByte 6_637_802 gas [ 6ns ] (computed in 24.112692062s) RocksDbReadValueByte 6_836_660 gas [ 6ns ] (computed in 20.590620688s) RocksDbReadValueByte 7_030_828 gas [ 7ns ] (computed in 23.016204945s) RocksDbReadValueByte 8_138_892 gas [ 8ns ] (computed in 22.800273225s) RocksDbReadValueByte 8_629_815 gas [ 8ns ] (computed in 21.172093785s) RocksDbReadValueByte 9_282_138 gas [ 9ns ] (computed in 22.364099438s) RocksDbReadValueByte 9_309_050 gas [ 9ns ] (computed in 21.910096242s) export CARGO_PROFILE_RELEASE_LTO=fat export CARGO_PROFILE_RELEASE_CODEGEN_UNITS=1 cargo build --release -p runtime-params-estimator --features required 8 runs in 4 parallel threads: target/release/runtime-params-estimator --metric time --costs RocksDbReadValueByte,RocksDbInsertValueByte\ --home ~/.near: RocksDbInsertValueByte 4_704_241 gas [ 4ns ] (computed in 24.334580544s) RocksDbInsertValueByte 5_025_573 gas [ 5ns ] (computed in 24.561436598s) RocksDbInsertValueByte 6_562_665 gas [ 6ns ] (computed in 24.517880931s) RocksDbInsertValueByte 7_859_404 gas [ 7ns ] (computed in 24.531307348s) RocksDbInsertValueByte 8_055_810 gas [ 8ns ] (computed in 27.72911072s) RocksDbInsertValueByte 8_998_820 gas [ 8ns ] (computed in 26.002797888s) RocksDbInsertValueByte 9_044_929 gas [ 9ns ] (computed in 23.025768285s) RocksDbInsertValueByte 9_232_981 gas [ 9ns ] (computed in 23.33538747s) RocksDbReadValueByte 6_704_198 gas [ 6ns ] (computed in 25.506228033s) RocksDbReadValueByte 6_718_421 gas [ 6ns ] (computed in 25.438596596s) RocksDbReadValueByte 7_174_273 gas [ 7ns ] (computed in 25.390843064s) RocksDbReadValueByte 7_337_272 gas [ 7ns ] (computed in 24.012619703s) RocksDbReadValueByte 7_358_555 gas [ 7ns ] (computed in 25.215203317s) RocksDbReadValueByte 8_112_395 gas [ 8ns ] (computed in 23.937673994s) RocksDbReadValueByte 8_929_693 gas [ 8ns ] (computed in 27.093712441s) RocksDbReadValueByte 8_964_181 gas [ 8ns ] (computed in 28.158183615s)
Replace default Snappy compression in RocksDB with lz4 on all levels
except of bottommost which is zstd.
We aren't going to do the recompression the nodes explicitly. We
expect RPC nodes to be almost fully updated in 5 epochs. For archival
nodes we don't have estimation on the part of the data to be
recompressed over time. Later on if it becomes critical we'll probably
make it possible in the CLI to recompress the whole DB in place.
Experimentation was done in the following manner: We read all
key/value pair from the store and wrote them in a new store for both
the current compression algo (snappy) and lz4+zstd.
All sizes are in GB and for testnet network.
Perf report: