1 files changed, 74 insertions, 0 deletions
diff --git a/database/engine/datafile.ksy b/database/engine/datafile.ksy
new file mode 100644
index 000000000..28d4b3935
--- /dev/null
+++ b/database/engine/datafile.ksy
@@ -0,0 +1,74 @@
+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