Module accounts_db

Persistent accounts are stored at this path location: <path>/<pid>/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

AccountFromStorage

reference an account found during scanning a storage. This is a byval struct to replace StoredAccountMeta

AccountStorageEntry

Persistent storage structure holding the accounts

AccountsAddRootTiming

AccountsDb

AccountsDbConfig

AccountsStats

BankHashStats

GetUniqueAccountsResult

IndexGenerationInfo

PubkeyHashAccount

PurgeStats

ShrinkStats

StoreAccountsTiming

VerifyAccountsHashAndLamportsConfig

Configuration Parameters for running accounts hash and total lamports verification

Enums

AccountShrinkThreshold

AccountsHashVerificationError

CalcAccountsHashDataSource

Specify the source of the accounts data when calculating the accounts hash

CalcAccountsHashKind

Which accounts hash calculation is being performed?

CreateAncientStorage

LoadHint

LoadedAccount

LoadedAccountAccessor

OldStoragesPolicy

How should old storages be handled in clean_accounts()?

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

PUBKEY_BINS_FOR_CALCULATING_HASHES

Functions

get_temp_accounts_paths

make_min_priority_thread_pool

quarter_thread_count

Type Aliases

AccountsFileId

AtomicAccountsFileId

An offset into the AccountsDb::storage vector

BinnedHashData