Module accounts_db

Persistent accounts are stored in below path location: //data/

The persistent store would allow for this mode of operation:

• Concurrent single thread append with many concurrent readers.

The underlying memory is memory mapped to a file. The accounts would be stored across multiple files and the mappings of file and offset of a particular account would be stored in a shared index. This will allow for concurrent commits without blocking reads, which will sequentially write to memory, ssd or disk, and should be as fast as the hardware allow for. The only required in memory data structure with a write lock is the index, which should be fast to update.

AppendVec’s only store accounts for single slots. To bootstrap the index from a persistent store of AppendVec’s, the entries include a “write_version”. A single global atomic AccountsDb::write_version tracks the number of commits to the entire data store. So the latest commit for each slot entry would be indexed.

Structs

AccountStorage

AccountStorageEntry

Persistent storage structure holding the accounts

AccountsAddRootTiming

AccountsDb

AccountsDbConfig

AccountsStats

BankHashInfo

BankHashStats

FillerAccountsConfig

FoundStoredAccount

GetUniqueAccountsResult

IndexGenerationInfo

StoreAccountsTiming

Enums

AccountShrinkThreshold

AccountStorageStatus

BankHashVerificationError

LoadHint

LoadZeroLamports

specifies how to return zero lamport accounts This will only be useful until a feature activation occurs.

LoadedAccount

LoadedAccountAccessor

ScanStorageResult

StoreReclaims

Constants

ACCOUNTS_DB_CONFIG_FOR_BENCHMARKS

ACCOUNTS_DB_CONFIG_FOR_TESTING

DEFAULT_ACCOUNTS_SHRINK_OPTIMIZE_TOTAL_SPACE

DEFAULT_ACCOUNTS_SHRINK_RATIO

DEFAULT_FILE_SIZE

DEFAULT_NUM_DIRS

DEFAULT_NUM_THREADS

EXPIRATION_TTL_SECONDS

NUM_SCAN_PASSES_DEFAULT

PUBKEY_BINS_FOR_CALCULATING_HASHES

Functions

get_temp_accounts_paths

make_min_priority_thread_pool

quarter_thread_count

Type Aliases

AppendVecId

AtomicAppendVecId

An offset into the AccountsDb::storage vector

BinnedHashData

SnapshotStorage

SnapshotStorages