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Optimise slasher DB layout and switch to MDBX (#2776)

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## Issue Addressed

Closes #2286
Closes #2538
Closes #2342

## Proposed Changes

Part II of major slasher optimisations after #2767

These changes will be backwards-incompatible due to the move to MDBX (and the schema change) 😱 

* [x] Shrink attester keys from 16 bytes to 7 bytes.
* [x] Shrink attester records from 64 bytes to 6 bytes.
* [x] Separate `DiskConfig` from regular `Config`.
* [x] Add configuration for the LRU cache size.
* [x] Add a "migration" that deletes any legacy LMDB database.
This commit is contained in:
Michael Sproul
2021-12-21 08:23:17 +00:00
parent a290a3c537
commit 3b61ac9cbf
26 changed files with 963 additions and 566 deletions
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15
slasher/src/metrics.rs
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@@ -4,7 +4,7 @@ pub use lighthouse_metrics::*;
lazy_static! {
pub static ref SLASHER_DATABASE_SIZE: Result<IntGauge> = try_create_int_gauge(
"slasher_database_size",
"Size of the LMDB database backing the slasher, in bytes"
"Size of the database backing the slasher, in bytes"
);
pub static ref SLASHER_RUN_TIME: Result<Histogram> = try_create_histogram(
"slasher_process_batch_time",
@@ -40,4 +40,17 @@ lazy_static! {
"slasher_compression_ratio",
"Compression ratio for min-max array chunks (higher is better)"
);
pub static ref SLASHER_NUM_ATTESTATION_ROOT_QUERIES: Result<IntCounter> =
try_create_int_counter(
"slasher_num_attestation_root_queries",
"Number of requests for an attestation data root",
);
pub static ref SLASHER_NUM_ATTESTATION_ROOT_HITS: Result<IntCounter> = try_create_int_counter(
"slasher_num_attestation_root_hits",
"Number of requests for an attestation data root that hit the LRU cache",
);
pub static ref SLASHER_ATTESTATION_ROOT_CACHE_SIZE: Result<IntGauge> = try_create_int_gauge(
"slasher_attestation_root_cache_size",
"Number of attestation data roots cached in memory"
);
}