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core/rawdb, cmd, ethdb, eth: implement freezer tail deletion (#23954)

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* core/rawdb, cmd, ethdb, eth: implement freezer tail deletion

* core/rawdb: address comments from martin and sina

* core/rawdb: fixes cornercase in tail deletion

* core/rawdb: separate metadata into a standalone file

* core/rawdb: remove unused code

* core/rawdb: add random test

* core/rawdb: polish code

* core/rawdb: fsync meta file before manipulating the index

* core/rawdb: fix typo

* core/rawdb: address comments
This commit is contained in:
rjl493456442
2022-03-10 16:37:23 +08:00
committed by GitHub
parent 8c8a9e5ca1
commit 538a868384
14 changed files with 1102 additions and 132 deletions
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16
ethdb/database.go
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@ -87,6 +87,10 @@ type AncientReader interface {
// Ancients returns the ancient item numbers in the ancient store.
Ancients() (uint64, error)
// Tail returns the number of first stored item in the freezer.
// This number can also be interpreted as the total deleted item numbers.
Tail() (uint64, error)
// AncientSize returns the ancient size of the specified category.
AncientSize(kind string) (uint64, error)
}
@ -107,8 +111,16 @@ type AncientWriter interface {
// The integer return value is the total size of the written data.
ModifyAncients(func(AncientWriteOp) error) (int64, error)
// TruncateAncients discards all but the first n ancient data from the ancient store.
TruncateAncients(n uint64) error
// TruncateHead discards all but the first n ancient data from the ancient store.
// After the truncation, the latest item can be accessed it item_n-1(start from 0).
TruncateHead(n uint64) error
// TruncateTail discards the first n ancient data from the ancient store. The already
// deleted items are ignored. After the truncation, the earliest item can be accessed
// is item_n(start from 0). The deleted items may not be removed from the ancient store
// immediately, but only when the accumulated deleted data reach the threshold then
// will be removed all together.
TruncateTail(n uint64) error
// Sync flushes all in-memory ancient store data to disk.
Sync() error