NAME
crit - CRiu Image Tool
SYNOPSIS
crit decode [-h] [-i IN] [-o OUT] [--pretty]
crit encode [-h] [-i IN] [-o OUT]
crit info [-h] in
crit x [-h] dir {ps,fds,mems}
crit show [-h] in
crit compress [-h] [--in-place] [--acceleration N]
dir
crit decompress [-h] [--in-place] dir
DESCRIPTION
crit is a feature-rich replacement for existing criu
show.
ARGUMENTS
Positional Arguments
decode
convert criu image from binary type JSON
encode
convert criu image from JSON type to binary
info
show info about image
x
explore image directory
show
convert criu image from binary to human-readable
JSON
compress
compress memory page images in a checkpoint directory
using CRIU’s LZ4 format. The command rewrites pages-.img*,
pagemap-.img*, and inventory.img. Pages that are zero-filled or
do not meet CRIU’s compression threshold are stored without an LZ4
payload. By default, the original files are preserved with a .bak
suffix; use --in-place to skip these backup files. The inventory is
updated to record compression metadata and the compressed-image version.
Existing .bak files are never overwritten.
decompress
decompress memory page images in a checkpoint directory
back to uncompressed page payloads. The command removes compression metadata
from the pagemap and inventory images. When the directory has no parent
reference, the command also restores the normal image version. It retains the
compressed-image version for incremental checkpoints because a parent may
still contain compressed payloads. By default, rewritten files are preserved
with a .bak suffix; use --in-place to skip these backup files.
Existing .bak files are never overwritten.
Both transformations preserve the ownership, permissions, ACLs,
security labels, and other extended attributes of rewritten images. All
output is staged and synchronized before it is installed. If a write,
rename, SIGHUP, SIGINT, or SIGTERM interrupts the
commit, CRIT restores the complete original image set instead of leaving a
partially transformed set.
Optional Arguments
-h, --help
Print some help and exit
--in-place
Rewrite files without creating .bak backup files.
This option is accepted by compress and decompress.
--acceleration N
Set the LZ4 acceleration level used by compress.
Higher values trade compression ratio for speed.
SEE ALSO
criu(8)
AUTHOR
The CRIU team
