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meta:
id: netdata_datafile
endian: le
seq:
- id: hdr
type: header
size: 4096
- id: extents
type: extent
repeat: eos
types:
header:
seq:
- id: magic
contents: "netdata-data-file"
- id: reserved
size: 15
- id: version
contents: "1.0"
- id: reserved1
size: 13
- id: tier
type: u1
extent_page_descr:
seq:
- id: type
type: u1
enum: page_type
- id: uuid
size: 16
- id: page_len
type: u4
- id: start_time_ut
type: u8
- id: end_time_ut
type: u8
enums:
page_type:
0: metrics
1: tier
extent_header:
seq:
- id: payload_length
type: u4
- id: compression_algorithm
type: u1
enum: compression_algos
- id: number_of_pages
type: u1
- id: page_descriptors
type: extent_page_descr
repeat: expr
repeat-expr: number_of_pages
enums:
compression_algos:
0: rrd_no_compression
1: rrd_lz4
extent_trailer:
seq:
- id: crc32_checksum
type: u4
extent:
seq:
- id: header
type: extent_header
- id: payload
size: header.payload_length
- id: trailer
type: extent_trailer
- id: padding
size: (((_io.pos + 4095) / 4096) * 4096) - _io.pos
# the extent size is made to always be a multiple of 4096
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