Documentation
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Overview ¶
Package durable holds low-level helpers for making filesystem operations survive power loss. Its single export, SyncDir, fsyncs a directory so that a rename or create within it is durable — the metadata operation that publishes a file under its final name is not flushed by fsyncing the file contents alone.
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
func SyncDir ¶
SyncDir fsyncs the directory at dirPath.
fsyncing a file flushes its data and inode, but NOT the parent directory entry that names it. After an atomic rename `<x>.inprogress` → `<x>`, only a directory fsync makes the new name durable; without it a power loss can leave the file stranded under its old name (or absent) even though the writer's Close returned success. Tarantool issues the same directory sync (xdir_sync) after publishing a WAL segment.
The directory is opened read-only purely to obtain a descriptor to sync; nothing is written through it. On platforms where a directory cannot be opened for sync the open will fail and the error is returned to the caller.
Types ¶
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Source Files