Waɗanne ne manyan hanyoyin IPC, kuma yaushe kake amfani da kowanne?

Question

IT Interview Practice · Accepted Answer

Saboda kowane process yana da **address space keɓaɓɓe**, ba za su iya kawai raba variables ba — suna bukatar **inter-process communication (IPC)**. OS yana ba da hanyoyi da dama, waɗanda suka bambanta a sauri, shugabanci, da ko suna aiki tsakanin na'urori.

## Manyan hanyoyin

```text
Pipe / FIFO      → byte stream, one direction; anonymous pipe = parent↔child, named FIFO = any procs
                   e.g.  ls | grep foo   (the shell wires stdout→stdin via a pipe)
Shared memory    → both map the SAME physical pages → FASTEST (no copy), but you must
                   synchronize access yourself (semaphore/mutex)
Message queue    → kernel-managed queue of discrete messages; decoupled, preserves boundaries
Socket           → bidirectional stream/datagram; UNIX-domain (same host) or TCP/UDP (across network)
Signal           → tiny async notification (a number), e.g. SIGINT, SIGTERM — control, not data transfer
```

## Zaɓen ɗaya

- **Pipes** — sauƙaƙan byte streams na hanya ɗaya; kashin bayan shell pipelines da haɗin parent/child.
- **Shared memory** — sa'ad da kake bukatar **throughput mai yawa / latency mara ƙima** (misali shared buffers na database). Shi ne mafi sauri domin ba a kwafa bayanai ta kernel — amma *ba ya* ba da synchronization, don haka kana haɗa shi da semaphores.
- **Message queues** — sa'ad da kake son **saƙonni na daban** tare da adana iyakoki da loose coupling.
- **Sockets** — mafi sassauci: **UNIX-domain sockets** na host iri ɗaya suna da sauri; TCP/UDP sockets suna kuma aiki **tsakanin na'urori**, shi ya sa sabis na network ke amfani da su.
- **Signals** — don al'amuran **sarrafawa (control)** (interrupt, ƙarewa, child ya fita), ba don motsa bayanai ba.

```text
        copy through kernel                          no copy
  slower ◀─────────────────────────────────────────────▶ faster
  socket / message queue / pipe            shared memory (+ your own locking)
```

## Me ya sa yake da muhimmanci

Zaɓen IPC yana tsara gine-gine da aiki na tsari. Masu hira suna son ganin ka daidaita hanya da buƙata: shared memory don tsananin sauri (yarda da nauyin synchronization), sockets don sassauci da bayyanuwar network, pipes don sauƙin streaming, signals don sarrafawa. Shi ne tushen fahimtar yadda shell pipeline, web server mai processes da yawa, shared buffers na database, ko microservices ke magana da juna da gaske.

Manyan hanyoyin

Zaɓen ɗaya

Me ya sa yake da muhimmanci

Tambayoyi masu alaƙa