Cache

source: bluebase/pf/cache.py

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class PfPageCache(page_size: int, capacity: int, replacer: PfReplacer)

Bases: object

page cache를 관리하는 클래스입니다.

Variables:

• page_size (int) – page의 크기.

• capacity (int) – cache의 용량.

• replacer (PfReplacer) – cache가 사용하는 교체 정책.

• entries (dict[PfEntryId, PfPage]) – cache가 관리하는 entry들.

optional_evict() → None

Hint

이런 함수가 있으면 편하다!

is_full() → bool

get_page_offset(pid: PfPageId) → int

assignmentread(file: PfFile, pid: PfPageId) → PfPage

Raises:

PfInvalidPageDataSizeError –

assignmentwrite(page: PfPage, *, fsync: bool = False) → None

Raises:

PfInvalidPageDataSizeError –

assignmentfetch(file: PfFile, pid: PfPageId) → PfPage

Raises:

PfNoEvictableEntryError –

assignmentacquire(file: PfFile, pid: PfPageId) → PfPage

Raises:

PfNoEvictableEntryError –

assignmenttouch(page: PfPage) → None

assignmentpersist(file: PfFile) → None

assignmentflush(file: PfFile) → None

Raises:

PfPinnedPageFlushError –