diff --git a/base-services.yml b/base-services.yml
index 93ba944..36c6e2e 100644
--- a/base-services.yml
+++ b/base-services.yml
@@ -1,185 +1,199 @@
 version: "3.7"
 
 services:
   memcache:
     image: memcached
     deploy:
       replicas: 1
 
   db-storage:
     image: postgres:13
     deploy:
       mode: global
       placement:
         constraints:
           - node.labels.org.softwareheritage.mirror.volumes.storage-db == true
     command: ['-c', 'shared_buffers=4GB', '-c', 'effective_cache_size=4GB', '-c', 'random_page_cost=1.5', '-c', 'max_wal_size=4GB']
     environment:
       POSTGRES_PASSWORD_FILE: /run/secrets/postgres-password
       POSTGRES_USER: swh
       POSTGRES_DB:
       # unset POSTGRES_DB: we're handling db creation ourselves in the backend
     volumes:
       - "storage-db:/var/lib/postgresql/data:rw,Z"
     secrets:
       - source: swh-mirror-db-postgres-password
         target: postgres-password
         uid: '999'
         mode: 0400
 
   db-web:
     image: postgres:13
     deploy:
       mode: global
       placement:
         constraints:
           - node.labels.org.softwareheritage.mirror.volumes.web-db == true
     command: ['-c', 'shared_buffers=4GB', '-c', 'effective_cache_size=4GB', '-c', 'random_page_cost=1.5', '-c', 'max_wal_size=4GB']
     environment:
       POSTGRES_PASSWORD_FILE: /run/secrets/postgres-password
       POSTGRES_USER: swh
       POSTGRES_DB: swh-web
     volumes:
       - "web-db:/var/lib/postgresql/data:rw,Z"
     secrets:
       - source: swh-mirror-web-postgres-password
         target: postgres-password
         uid: '999'
         mode: 0400
 
   web:
     image: softwareheritage/web:${SWH_IMAGE_TAG:-latest}
     configs:
       - source: web
         target: /etc/softwareheritage/config.yml
     command: serve
     environment:
       PORT: "5004"
       PGHOST: db-web
       PGUSER: swh
       POSTGRES_DB: swh-web
     depends_on:
       - db-web
       - memcache
     secrets:
       - source: swh-mirror-web-postgres-password
         target: postgres-password
         mode: 0400
 
   objstorage:
     image: softwareheritage/base:${SWH_IMAGE_TAG:-latest}
     deploy:
       # needed to allow actual and dynamic load balancing
       endpoint_mode: dnsrr
       # a real life replicas value better be in the 16 to 64 range
       replicas: 2
       placement:
         # note: if using a local volume, you need to pin the objstorage
         # instances on the node hosting the volume, eg. the manager, otherwise,
         # if using a remote/distributed objstorage backend (seaweedfs, cloud,
         # etc.) you want to remove this placement constraint
         constraints:
           - node.labels.org.softwareheritage.mirror.volumes.objstorage == true
     volumes:
       - "objstorage:/srv/softwareheritage/objects:rw,Z"
     configs:
       - source: objstorage
         target: /etc/softwareheritage/config.yml
     environment:
       PORT: "5003"
       STATSD_HOST: prometheus-statsd-exporter
       STATSD_PORT: 9125
     command: objstorage
 
   storage:
     image: softwareheritage/base:${SWH_IMAGE_TAG:-latest}
     deploy:
       # needed to allow actual and dynammic load balancing
       endpoint_mode: dnsrr
       # a real life replicas value better be in the 16 to 64 range
       replicas: 2
     configs:
       - source: storage
         target: /etc/softwareheritage/config.yml
     environment:
       PGHOST: db-storage
       PGUSER: swh
       POSTGRES_DB: swh-storage
       FLAVOR: mirror
       PORT: "5002"
       STATSD_HOST: prometheus-statsd-exporter
       STATSD_PORT: 9125
     command: storage
     depends_on:
       - db-storage
     secrets:
       - source: swh-mirror-db-postgres-password
         target: postgres-password
         mode: 0400
 
   nginx:
     image: nginx
     configs:
       - source: nginx
         target: /etc/nginx/nginx.conf
     ports:
       - "5081:5081/tcp"
     deploy:
       placement:
         constraints:
           - node.role == manager
 
   prometheus:
     image: prom/prometheus
     depends_on:
     - prometheus-statsd-exporter
     command:
       # Needed for the reverse-proxy
       - "--web.external-url=/prometheus"
       - "--config.file=/etc/prometheus/prometheus.yml"
     volumes:
       - "./conf/prometheus.yml:/etc/prometheus/prometheus.yml:ro,Z"
     deploy:
       mode: global
 
   prometheus-statsd-exporter:
     image: prom/statsd-exporter
     command:
       - "--statsd.mapping-config=/etc/prometheus/statsd-mapping.yml"
     volumes:
       - "./conf/prometheus-statsd-mapping.yml:/etc/prometheus/statsd-mapping.yml:ro,Z"
 
   grafana:
     image: grafana/grafana
     depends_on:
     - prometheus
     environment:
       GF_SERVER_ROOT_URL: http://localhost:5081/grafana
     volumes:
       - "./conf/grafana/provisioning:/etc/grafana/provisioning:ro,Z"
       - "./conf/grafana/dashboards:/var/lib/grafana/dashboards:rw,Z"
 
+  redis:
+    image: redis:6.2.6
+    deploy:
+      mode: global
+      placement:
+        constraints:
+          - node.labels.org.softwareheritage.mirror.volumes.redis == true
+    command:
+      - redis-server
+      - --save 60 1
+      - --loglevel warning
+    volumes:
+      - redis:/data
+
 volumes:
   objstorage:
   storage-db:
   web-db:
 
 secrets:
   swh-mirror-db-postgres-password:
     external: true
   swh-mirror-web-postgres-password:
     external: true
 
 configs:
   storage:
     file: conf/storage.yml
     name: storage
   objstorage:
     file: conf/objstorage.yml
     name: objstorage
   nginx:
     file: conf/nginx.conf
     name: nginx
   web:
     file: conf/web.yml
     name: web
diff --git a/conf/content-replayer.yml.example b/conf/content-replayer.yml.example
index 2958224..9c7cebf 100644
--- a/conf/content-replayer.yml.example
+++ b/conf/content-replayer.yml.example
@@ -1,28 +1,36 @@
 objstorage:
   cls: remote
   url: http://storage0.euwest.azure.internal.softwareheritage.org:5003
   max_retries: 5
   pool_connections: 100
   pool_maxsize: 200
 
 objstorage_dst:
   cls: remote
   args:
     url: http://objstorage:5003
 
 journal_client:
   cls: kafka
   brokers:
     - kafka1
     - kafka2
     - kafka3
   group_id: test-user-content-replayer-x-change-me
   sasl.username: test-user
   sasl.password: change-me
   security.protocol: sasl_ssl
   sasl.mechanism: SCRAM-SHA-512
   session.timeout.ms: 600000
   max.poll.interval.ms: 3600000
   message.max.bytes: 1000000000
   privileged: true
   batch_size: 2000
+
+replayer:
+  error_reporter:
+    # used to track objects that the replayer really failed at replication from
+    # the soure objstorage to the destination one
+    host: redis
+    port: 6379
+    db: 0
diff --git a/conf/graph-replayer.yml.example b/conf/graph-replayer.yml.example
index 32a8a22..2bd05c1 100644
--- a/conf/graph-replayer.yml.example
+++ b/conf/graph-replayer.yml.example
@@ -1,40 +1,48 @@
 storage:
   cls: pipeline
   step:
   - cls: filter
   - cls: tenacious
     error_rate_limit:
       # fail after 10 errors for 1000 operations
       errors: 10
       window_size: 1000
   - cls: remote
     url: http://storage:5002/
     max_retries: 5
     pool_connections: 100
     pool_maxsize: 200
 
 journal_client:
   cls: kafka
   brokers:
     - kafka1
     - kafka2
     - kafka3
   group_id: test-user-graph-replayer-x-change-me
   sasl.username: test-user
   sasl.password: change-me
   security.protocol: sasl_ssl
   sasl.mechanism: SCRAM-SHA-512
   session.timeout.ms: 600000
   max.poll.interval.ms: 3600000
   message.max.bytes: 1000000000
   object_types:
     - content
     - skipped_content
     - directory
     - origin
     - origin_visit
     - origin_visit_status
     - release
     - revision
     - snapshot
   privileged: true
+
+replayer:
+  error_reporter:
+    # used to track objects that the replayer really failed at storing in the
+    # storage
+    host: redis
+    port: 6379
+    db: 0
diff --git a/content-replayer-override.yml b/content-replayer-override.yml
index 7050a44..438ba70 100644
--- a/content-replayer-override.yml
+++ b/content-replayer-override.yml
@@ -1,21 +1,22 @@
 # Mirror specific services
 version: '3.7'
 
 services:
   content-replayer:
     image: softwareheritage/replayer:${SWH_IMAGE_TAG:-latest}
     environment:
       STATSD_HOST: prometheus-statsd-exporter
       STATSD_PORT: 9125
     configs:
       - source: content-replayer
         target: /etc/softwareheritage/config.yml
     command:
       - content-replayer
     depends_on:
       - objstorage
+      - redis
 
 configs:
   content-replayer:
     file: conf/content-replayer.yml
     name: content-replayer
diff --git a/graph-replayer-override.yml b/graph-replayer-override.yml
index 6e8d282..be87aa4 100644
--- a/graph-replayer-override.yml
+++ b/graph-replayer-override.yml
@@ -1,21 +1,22 @@
 # Mirror specific services
 version: '3.7'
 
 services:
   graph-replayer:
     image: softwareheritage/replayer:${SWH_IMAGE_TAG:-latest}
     environment:
       STATSD_HOST: prometheus-statsd-exporter
       STATSD_PORT: 9125
     configs:
       - source: graph-replayer
         target: /etc/softwareheritage/config.yml
     command:
       - graph-replayer
     depends_on:
       - storage
+      - redis
 
 configs:
   graph-replayer:
     file: conf/graph-replayer.yml
     name: graph-replayer