diff --git a/Cargo.lock b/Cargo.lock
index 9afe12e..f543e35 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
 [[package]]
 name = "ahash"
 version = "0.3.8"
@@ -39,9 +45,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.41"
+version = "1.0.52"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15af2628f6890fe2609a3b91bef4c83450512802e59489f9c1cb1fa5df064a61"
+checksum = "84450d0b4a8bd1ba4144ce8ce718fbc5d071358b1e5384bace6536b3d1f2d5b3"
 
 [[package]]
 name = "arc-interner"
@@ -72,6 +78,37 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
+[[package]]
+name = "bare-metrics-core"
+version = "0.1.0"
+dependencies = [
+ "hdrhistogram",
+ "serde",
+ "serde_bare 0.5.0",
+]
+
+[[package]]
+name = "bare-metrics-recorder"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "bare-metrics-core",
+ "crossbeam-channel",
+ "dashmap",
+ "fxhash",
+ "hdrhistogram",
+ "log",
+ "metrics",
+ "serde_bare 0.5.0",
+ "thiserror",
+]
+
+[[package]]
+name = "base64"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
+
 [[package]]
 name = "bitflags"
 version = "1.2.1"
@@ -196,6 +233,15 @@ dependencies = [
  "tiny-keccak",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "738c290dfaea84fc1ca15ad9c168d083b05a714e1efddd8edaab678dc28d2836"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.1"
@@ -262,6 +308,7 @@ version = "0.5.0-alpha.2"
 dependencies = [
  "anyhow",
  "arc-interner",
+ "bare-metrics-recorder",
  "byteorder",
  "chrono",
  "clap",
@@ -273,6 +320,7 @@ dependencies = [
  "indicatif",
  "itertools 0.10.1",
  "log",
+ "metrics",
  "serde",
  "serde_json",
  "termion",
@@ -357,6 +405,18 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5afa29be46b12c8c380b997def8d1ac77c2665da93eb0a768fab0bf4db79333f"
 
+[[package]]
+name = "flate2"
+version = "1.0.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e6988e897c1c9c485f43b47a529cef42fde0547f9d8d41a7062518f1d8fc53f"
+dependencies = [
+ "cfg-if 1.0.0",
+ "crc32fast",
+ "libc",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "fs2"
 version = "0.4.3"
@@ -367,6 +427,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "fxhash"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c31b6d751ae2c7f11320402d34e41349dd1016f8d5d45e48c4312bc8625af50c"
+dependencies = [
+ "byteorder",
+]
+
 [[package]]
 name = "gcc"
 version = "0.3.55"
@@ -419,6 +488,20 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "hdrhistogram"
+version = "7.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6490be71f07a5f62b564bc58e36953f675833df11c7e4a0647bee7a07ca1ec5e"
+dependencies = [
+ "base64",
+ "byteorder",
+ "crossbeam-channel",
+ "flate2",
+ "nom",
+ "num-traits",
+]
+
 [[package]]
 name = "heck"
 version = "0.3.3"
@@ -583,13 +666,12 @@ dependencies = [
 
 [[package]]
 name = "metrics"
-version = "0.17.0"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a00f42f354a2ed4894db863b3a4db47aef2d2e4435b937221749bd37a8a7aaa8"
+checksum = "55586aa936c35f34ba8aa5d97356d554311206e1ce1f9e68fe7b07288e5ad827"
 dependencies = [
  "ahash 0.7.6",
  "metrics-macros",
- "proc-macro-hack",
 ]
 
 [[package]]
@@ -606,6 +688,22 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
+[[package]]
+name = "miniz_oxide"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a92518e98c078586bc6c934028adcca4c92a53d6a958196de835170a01d84e4b"
+dependencies = [
+ "adler",
+ "autocfg",
+]
+
 [[package]]
 name = "nix"
 version = "0.17.0"
@@ -631,6 +729,17 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "nom"
+version = "7.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b1d11e1ef389c76fe5b81bcaf2ea32cf88b62bc494e19f493d0b30e7a930109"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+ "version_check",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.44"
@@ -914,9 +1023,9 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
 [[package]]
 name = "serde"
-version = "1.0.126"
+version = "1.0.133"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec7505abeacaec74ae4778d9d9328fe5a5d04253220a85c4ee022239fc996d03"
+checksum = "97565067517b60e2d1ea8b268e59ce036de907ac523ad83a0475da04e818989a"
 dependencies = [
  "serde_derive",
 ]
@@ -931,10 +1040,19 @@ dependencies = [
 ]
 
 [[package]]
-name = "serde_derive"
-version = "1.0.126"
+name = "serde_bare"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "963a7dbc9895aeac7ac90e74f34a5d5261828f79df35cbed41e10189d3804d43"
+checksum = "51c55386eed0f1ae957b091dc2ca8122f287b60c79c774cbe3d5f2b69fded660"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.133"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed201699328568d8d08208fdd080e3ff594e6c422e438b6705905da01005d537"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1055,18 +1173,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.25"
+version = "1.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa6f76457f59514c7eeb4e59d891395fab0b2fd1d40723ae737d64153392e9c6"
+checksum = "854babe52e4df1653706b98fcfc05843010039b406875930a70e4d9644e5c417"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.25"
+version = "1.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a36768c0fbf1bb15eca10defa29526bda730a2376c2ab4393ccfa16fb1a318d"
+checksum = "aa32fd3f627f367fe16f893e2597ae3c05020f8bba2666a4e6ea73d377e5714b"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1241,7 +1359,7 @@ dependencies = [
  "rusqlite",
  "rustyline",
  "serde",
- "serde_bare",
+ "serde_bare 0.3.0",
  "sodiumoxide",
  "sshish",
  "temp-dir",
diff --git a/datman/Cargo.toml b/datman/Cargo.toml
index 4d2e3f5..7559721 100644
--- a/datman/Cargo.toml
+++ b/datman/Cargo.toml
@@ -31,3 +31,5 @@ chrono = "0.4.19"
 itertools = "0.10.1"
 hostname = "0.3.1"
 yama = { path = "../yama", version = "0.5.0-alpha.1" }
+metrics = "0.17.1"
+bare-metrics-recorder = { path = "../../../libraries/bare-metrics/bare-metrics-recorder" }
diff --git a/datman/src/bin/datman.rs b/datman/src/bin/datman.rs
index 89ecc8a..1667476 100644
--- a/datman/src/bin/datman.rs
+++ b/datman/src/bin/datman.rs
@@ -15,12 +15,14 @@ You should have received a copy of the GNU General Public License
 along with Yama.  If not, see <https://www.gnu.org/licenses/>.
 */
 
+use std::fs::File;
 use std::path::{Path, PathBuf};
 
 use clap::Parser;
 use env_logger::Env;
 
 use anyhow::bail;
+use bare_metrics_recorder::recording::BareMetricsRecorderCore;
 use chrono::{DateTime, Local, NaiveDate, NaiveDateTime, TimeZone, Utc};
 use datman::commands::backup::{backup_all_sources_to_destination, backup_source_to_destination};
 use datman::commands::ilabel::interactive_labelling_session;
@@ -169,6 +171,15 @@ fn with_exitcode<R>(result: anyhow::Result<R>) {
 fn main() -> anyhow::Result<()> {
     env_logger::Builder::from_env(Env::default().default_filter_or("info")).init();
 
+    let now = Utc::now();
+
+    let (shard, stopper) = BareMetricsRecorderCore::new(File::create(format!(
+        "/tmp/datman_{}.baremetrics",
+        now.format("%F_%H%M%S")
+    ))?)
+    .start("datman".to_string())?;
+    shard.install_as_metrics_recorder()?;
+
     let opts: DatmanCommand = DatmanCommand::parse();
 
     match opts {
diff --git a/yama/Cargo.toml b/yama/Cargo.toml
index bb09dc0..4fdbedc 100644
--- a/yama/Cargo.toml
+++ b/yama/Cargo.toml
@@ -39,7 +39,7 @@ rusqlite = "0.24.2"
 chrono = "0.4.19"
 rustyline = "7.1.0"
 derivative = "2.2.0"
-metrics = "0.17.0"
+metrics = "0.17.1"
 
 [dev-dependencies]
 temp-dir = "0.1.11"
diff --git a/yama/src/pile/compression.rs b/yama/src/pile/compression.rs
index 0675ea0..d233e33 100644
--- a/yama/src/pile/compression.rs
+++ b/yama/src/pile/compression.rs
@@ -23,6 +23,7 @@ use anyhow::anyhow;
 use crossbeam_channel::{Receiver, Sender};
 use derivative::Derivative;
 use log::error;
+use metrics::{register_counter, Unit};
 use zstd::block::{Compressor, Decompressor};
 
 use crate::definitions::ChunkId;
@@ -58,6 +59,37 @@ impl<R: RawPile> RawPileCompressor<R> {
         underlying: R,
         settings: CompressionSettings,
     ) -> anyhow::Result<(Self, Vec<JoinHandle<()>>)> {
+        register_counter!(
+            "compressor_in_bytes",
+            Unit::Bytes,
+            "Number of bytes that have been fed into the compressor"
+        );
+        register_counter!(
+            "compressor_out_bytes",
+            Unit::Bytes,
+            "Number of bytes that have come out of the compressor"
+        );
+        register_counter!(
+            "compressor_chunks",
+            Unit::Count,
+            "Number of chunks that have been compressed"
+        );
+        register_counter!(
+            "decompressor_in_bytes",
+            Unit::Bytes,
+            "Number of bytes that have been fed into the decompressor"
+        );
+        register_counter!(
+            "decompressor_out_bytes",
+            Unit::Bytes,
+            "Number of bytes that have come out of the decompressor"
+        );
+        register_counter!(
+            "decompressor_chunks",
+            Unit::Count,
+            "Number of chunks that have been decompressed"
+        );
+
         if settings.num_compressors == 0 && settings.num_decompressors == 0 {
             // optimisation for when we're only building a pipeline: we don't want to
             return Ok((
@@ -204,8 +236,15 @@ impl<R: RawPile> RawPileCompressor<R> {
             let bytes = compressor.compress(&bytes, level)?;
             let out_bytes = bytes.len();
             next_stage.send((chunk_id, bytes))?;
+            // Per-worker metrics
+            // TODO rename
             metrics::counter!("compressor_bytes_input", in_bytes as u64, "id" => worker_id);
             metrics::counter!("compressor_bytes_output", out_bytes as u64, "id" => worker_id);
+
+            // Global metrics
+            metrics::counter!("compressor_in_bytes", in_bytes as u64);
+            metrics::counter!("compressor_out_bytes", out_bytes as u64);
+            metrics::increment_counter!("compressor_chunks");
         }
 
         Ok(())