Module balance 

Balance operations: redistributing data and metadata across devices

A balance rewrites chunks across the filesystem’s devices according to optional filter criteria (usage threshold, device selection, profile conversion). It is also used to change the RAID profile of a block group type, or to reduce the number of devices in a filesystem.

Requires CAP_SYS_ADMIN.

Structs

BalanceArgs

Per-type filter arguments for a balance operation, corresponding to btrfs_balance_args.

BalanceArgsFlags

Per-chunk-type filter flags (btrfs_balance_args.flags).

BalanceFlags

Top-level flags for a balance operation (btrfs_ioctl_balance_args.flags).

BalanceProgress

Progress counters returned by the kernel for an in-progress balance.

BalanceState

State flags returned by the kernel (btrfs_ioctl_balance_args.state).

Enums

BalanceCtl

Control command for balance_ctl.

Functions

balance

Start or resume a balance operation on the filesystem referred to by fd.

balance_ctl

Send a control command to a running balance operation on the filesystem referred to by fd.

balance_progress

Query the current balance state and progress on the filesystem referred to by fd.