diff --git a/terraform/cos/README.md b/terraform/cos/README.md
index 4a951003..86f4953a 100644
--- a/terraform/cos/README.md
+++ b/terraform/cos/README.md
@@ -41,10 +41,10 @@ This is a Terraform module facilitating the deployment of the COS solution, usin
 | <a name="input_internal_tls"></a> [internal\_tls](#input\_internal\_tls) | Specify whether to use TLS or not for internal COS communication. By default, TLS is enabled using self-signed-certificates | `bool` | `true` | no |
 | <a name="input_loki_bucket"></a> [loki\_bucket](#input\_loki\_bucket) | Loki bucket name | `string` | `"loki"` | no |
 | <a name="input_loki_coordinator"></a> [loki\_coordinator](#input\_loki\_coordinator) | Application configuration for Loki Coordinator. For more details: https://registry.terraform.io/providers/juju/juju/latest/docs/resources/application | <pre>object({<br/>    config             = optional(map(string), {})<br/>    constraints        = optional(string, "arch=amd64")<br/>    revision           = optional(number, null)<br/>    storage_directives = optional(map(string), {})<br/>    units              = optional(number, 3)<br/>  })</pre> | `{}` | no |
-| <a name="input_loki_worker"></a> [loki\_worker](#input\_loki\_worker) | Application configuration for all Loki Workers. For more details: https://registry.terraform.io/providers/juju/juju/latest/docs/resources/application | <pre>object({<br/>    backend_config     = optional(map(string), {})<br/>    read_config        = optional(map(string), {})<br/>    write_config       = optional(map(string), {})<br/>    constraints        = optional(string, "arch=amd64")<br/>    revision           = optional(number, null)<br/>    storage_directives = optional(map(string), {})<br/>    backend_units      = optional(number, 3)<br/>    read_units         = optional(number, 3)<br/>    write_units        = optional(number, 3)<br/>  })</pre> | `{}` | no |
+| <a name="input_loki_worker"></a> [loki\_worker](#input\_loki\_worker) | Application configuration for all Loki Workers. For more details: https://registry.terraform.io/providers/juju/juju/latest/docs/resources/application | <pre>object({<br/>    backend_config             = optional(map(string), {})<br/>    read_config                = optional(map(string), {})<br/>    write_config               = optional(map(string), {})<br/>    constraints                = optional(string, "arch=amd64")<br/>    revision                   = optional(number, null)<br/>    backend_storage_directives = optional(map(string), {})<br/>    read_storage_directives    = optional(map(string), {})<br/>    write_storage_directives   = optional(map(string), {})<br/>    backend_units              = optional(number, 3)<br/>    read_units                 = optional(number, 3)<br/>    write_units                = optional(number, 3)<br/>  })</pre> | `{}` | no |
 | <a name="input_mimir_bucket"></a> [mimir\_bucket](#input\_mimir\_bucket) | Mimir bucket name | `string` | `"mimir"` | no |
 | <a name="input_mimir_coordinator"></a> [mimir\_coordinator](#input\_mimir\_coordinator) | Application configuration for Mimir Coordinator. For more details: https://registry.terraform.io/providers/juju/juju/latest/docs/resources/application | <pre>object({<br/>    config             = optional(map(string), {})<br/>    constraints        = optional(string, "arch=amd64")<br/>    revision           = optional(number, null)<br/>    storage_directives = optional(map(string), {})<br/>    units              = optional(number, 3)<br/>  })</pre> | `{}` | no |
-| <a name="input_mimir_worker"></a> [mimir\_worker](#input\_mimir\_worker) | Application configuration for all Mimir Workers. For more details: https://registry.terraform.io/providers/juju/juju/latest/docs/resources/application | <pre>object({<br/>    backend_config     = optional(map(string), {})<br/>    read_config        = optional(map(string), {})<br/>    write_config       = optional(map(string), {})<br/>    constraints        = optional(string, "arch=amd64")<br/>    revision           = optional(number, null)<br/>    storage_directives = optional(map(string), {})<br/>    backend_units      = optional(number, 3)<br/>    read_units         = optional(number, 3)<br/>    write_units        = optional(number, 3)<br/>  })</pre> | `{}` | no |
+| <a name="input_mimir_worker"></a> [mimir\_worker](#input\_mimir\_worker) | Application configuration for all Mimir Workers. For more details: https://registry.terraform.io/providers/juju/juju/latest/docs/resources/application | <pre>object({<br/>    backend_config             = optional(map(string), {})<br/>    read_config                = optional(map(string), {})<br/>    write_config               = optional(map(string), {})<br/>    constraints                = optional(string, "arch=amd64")<br/>    revision                   = optional(number, null)<br/>    backend_storage_directives = optional(map(string), {})<br/>    read_storage_directives    = optional(map(string), {})<br/>    write_storage_directives   = optional(map(string), {})<br/>    backend_units              = optional(number, 3)<br/>    read_units                 = optional(number, 3)<br/>    write_units                = optional(number, 3)<br/>  })</pre> | `{}` | no |
 | <a name="input_model_uuid"></a> [model\_uuid](#input\_model\_uuid) | Reference to an existing model resource or data source for the model to deploy to | `string` | n/a | yes |
 | <a name="input_opentelemetry_collector"></a> [opentelemetry\_collector](#input\_opentelemetry\_collector) | Application configuration for OpenTelemetry Collector. For more details: https://registry.terraform.io/providers/juju/juju/latest/docs/resources/application | <pre>object({<br/>    app_name           = optional(string, "otelcol")<br/>    config             = optional(map(string), {})<br/>    constraints        = optional(string, "arch=amd64")<br/>    revision           = optional(number, null)<br/>    storage_directives = optional(map(string), {})<br/>    units              = optional(number, 1)<br/>  })</pre> | `{}` | no |
 | <a name="input_s3_access_key"></a> [s3\_access\_key](#input\_s3\_access\_key) | S3 access-key credential | `string` | n/a | yes |
diff --git a/terraform/cos/applications.tf b/terraform/cos/applications.tf
index 1c56535a..bd59c7f0 100644
--- a/terraform/cos/applications.tf
+++ b/terraform/cos/applications.tf
@@ -35,34 +35,36 @@ module "grafana" {
 }
 
 module "loki" {
-  source                           = "git::https://github.com/canonical/observability-stack//terraform/loki"
-  anti_affinity                    = var.anti_affinity
-  channel                          = var.channel
-  model_uuid                       = var.model_uuid
-  s3_endpoint                      = var.s3_endpoint
-  s3_secret_key                    = var.s3_secret_key
-  s3_access_key                    = var.s3_access_key
-  s3_bucket                        = var.loki_bucket
-  s3_integrator_channel            = var.s3_integrator.channel
-  s3_integrator_config             = var.s3_integrator.config
-  s3_integrator_constraints        = var.s3_integrator.constraints
-  s3_integrator_revision           = var.s3_integrator.revision
-  s3_integrator_storage_directives = var.s3_integrator.storage_directives
-  s3_integrator_units              = var.s3_integrator.units
-  coordinator_config               = var.loki_coordinator.config
-  coordinator_constraints          = var.loki_coordinator.constraints
-  coordinator_revision             = var.loki_coordinator.revision
-  coordinator_storage_directives   = var.loki_coordinator.storage_directives
-  coordinator_units                = var.loki_coordinator.units
-  backend_config                   = var.loki_worker.backend_config
-  read_config                      = var.loki_worker.read_config
-  write_config                     = var.loki_worker.write_config
-  worker_constraints               = var.loki_worker.constraints
-  worker_revision                  = var.loki_worker.revision
-  worker_storage_directives        = var.loki_worker.storage_directives
-  backend_units                    = var.loki_worker.backend_units
-  read_units                       = var.loki_worker.read_units
-  write_units                      = var.loki_worker.write_units
+  source                            = "git::https://github.com/canonical/observability-stack//terraform/loki"
+  anti_affinity                     = var.anti_affinity
+  channel                           = var.channel
+  model_uuid                        = var.model_uuid
+  s3_endpoint                       = var.s3_endpoint
+  s3_secret_key                     = var.s3_secret_key
+  s3_access_key                     = var.s3_access_key
+  s3_bucket                         = var.loki_bucket
+  s3_integrator_channel             = var.s3_integrator.channel
+  s3_integrator_config              = var.s3_integrator.config
+  s3_integrator_constraints         = var.s3_integrator.constraints
+  s3_integrator_revision            = var.s3_integrator.revision
+  s3_integrator_storage_directives  = var.s3_integrator.storage_directives
+  s3_integrator_units               = var.s3_integrator.units
+  coordinator_config                = var.loki_coordinator.config
+  coordinator_constraints           = var.loki_coordinator.constraints
+  coordinator_revision              = var.loki_coordinator.revision
+  coordinator_storage_directives    = var.loki_coordinator.storage_directives
+  coordinator_units                 = var.loki_coordinator.units
+  backend_config                    = var.loki_worker.backend_config
+  read_config                       = var.loki_worker.read_config
+  write_config                      = var.loki_worker.write_config
+  worker_constraints                = var.loki_worker.constraints
+  worker_revision                   = var.loki_worker.revision
+  backend_worker_storage_directives = var.loki_worker.backend_storage_directives
+  read_worker_storage_directives    = var.loki_worker.read_storage_directives
+  write_worker_storage_directives   = var.loki_worker.write_storage_directives
+  backend_units                     = var.loki_worker.backend_units
+  read_units                        = var.loki_worker.read_units
+  write_units                       = var.loki_worker.write_units
 }
 
 module "mimir" {
@@ -89,19 +91,21 @@ module "mimir" {
       "max_global_exemplars_per_user" = "100000"
     }
   )
-  coordinator_constraints        = var.mimir_coordinator.constraints
-  coordinator_revision           = var.mimir_coordinator.revision
-  coordinator_storage_directives = var.mimir_coordinator.storage_directives
-  coordinator_units              = var.mimir_coordinator.units
-  backend_config                 = var.mimir_worker.backend_config
-  read_config                    = var.mimir_worker.read_config
-  write_config                   = var.mimir_worker.write_config
-  worker_constraints             = var.mimir_worker.constraints
-  worker_revision                = var.mimir_worker.revision
-  worker_storage_directives      = var.mimir_worker.storage_directives
-  backend_units                  = var.mimir_worker.backend_units
-  read_units                     = var.mimir_worker.read_units
-  write_units                    = var.mimir_worker.write_units
+  coordinator_constraints           = var.mimir_coordinator.constraints
+  coordinator_revision              = var.mimir_coordinator.revision
+  coordinator_storage_directives    = var.mimir_coordinator.storage_directives
+  coordinator_units                 = var.mimir_coordinator.units
+  backend_config                    = var.mimir_worker.backend_config
+  read_config                       = var.mimir_worker.read_config
+  write_config                      = var.mimir_worker.write_config
+  worker_constraints                = var.mimir_worker.constraints
+  worker_revision                   = var.mimir_worker.revision
+  backend_worker_storage_directives = var.mimir_worker.backend_storage_directives
+  read_worker_storage_directives    = var.mimir_worker.read_storage_directives
+  write_worker_storage_directives   = var.mimir_worker.write_storage_directives
+  backend_units                     = var.mimir_worker.backend_units
+  read_units                        = var.mimir_worker.read_units
+  write_units                       = var.mimir_worker.write_units
 }
 
 module "opentelemetry_collector" {
@@ -129,40 +133,45 @@ module "ssc" {
 }
 
 module "tempo" {
-  source                           = "git::https://github.com/canonical/tempo-operators//terraform"
-  anti_affinity                    = var.anti_affinity
-  channel                          = var.channel
-  model_uuid                       = var.model_uuid
-  s3_endpoint                      = var.s3_endpoint
-  s3_access_key                    = var.s3_access_key
-  s3_secret_key                    = var.s3_secret_key
-  s3_bucket                        = var.tempo_bucket
-  s3_integrator_channel            = var.s3_integrator.channel
-  s3_integrator_config             = var.s3_integrator.config
-  s3_integrator_constraints        = var.s3_integrator.constraints
-  s3_integrator_revision           = var.s3_integrator.revision
-  s3_integrator_storage_directives = var.s3_integrator.storage_directives
-  s3_integrator_units              = var.s3_integrator.units
-  coordinator_config               = var.tempo_coordinator.config
-  coordinator_constraints          = var.tempo_coordinator.constraints
-  coordinator_revision             = var.tempo_coordinator.revision
-  coordinator_storage_directives   = var.tempo_coordinator.storage_directives
-  coordinator_units                = var.tempo_coordinator.units
-  querier_config                   = var.tempo_worker.querier_config
-  query_frontend_config            = var.tempo_worker.query_frontend_config
-  ingester_config                  = var.tempo_worker.ingester_config
-  distributor_config               = var.tempo_worker.distributor_config
-  compactor_config                 = var.tempo_worker.compactor_config
-  metrics_generator_config         = var.tempo_worker.metrics_generator_config
-  worker_constraints               = var.tempo_worker.constraints
-  worker_revision                  = var.tempo_worker.revision
-  worker_storage_directives        = var.tempo_worker.storage_directives
-  compactor_units                  = var.tempo_worker.compactor_units
-  distributor_units                = var.tempo_worker.distributor_units
-  ingester_units                   = var.tempo_worker.ingester_units
-  metrics_generator_units          = var.tempo_worker.metrics_generator_units
-  querier_units                    = var.tempo_worker.querier_units
-  query_frontend_units             = var.tempo_worker.query_frontend_units
+  source                                      = "git::https://github.com/canonical/tempo-operators//terraform"
+  anti_affinity                               = var.anti_affinity
+  channel                                     = var.channel
+  model_uuid                                  = var.model_uuid
+  s3_endpoint                                 = var.s3_endpoint
+  s3_access_key                               = var.s3_access_key
+  s3_secret_key                               = var.s3_secret_key
+  s3_bucket                                   = var.tempo_bucket
+  s3_integrator_channel                       = var.s3_integrator.channel
+  s3_integrator_config                        = var.s3_integrator.config
+  s3_integrator_constraints                   = var.s3_integrator.constraints
+  s3_integrator_revision                      = var.s3_integrator.revision
+  s3_integrator_storage_directives            = var.s3_integrator.storage_directives
+  s3_integrator_units                         = var.s3_integrator.units
+  coordinator_config                          = var.tempo_coordinator.config
+  coordinator_constraints                     = var.tempo_coordinator.constraints
+  coordinator_revision                        = var.tempo_coordinator.revision
+  coordinator_storage_directives              = var.tempo_coordinator.storage_directives
+  coordinator_units                           = var.tempo_coordinator.units
+  querier_config                              = var.tempo_worker.querier_config
+  query_frontend_config                       = var.tempo_worker.query_frontend_config
+  ingester_config                             = var.tempo_worker.ingester_config
+  distributor_config                          = var.tempo_worker.distributor_config
+  compactor_config                            = var.tempo_worker.compactor_config
+  metrics_generator_config                    = var.tempo_worker.metrics_generator_config
+  worker_constraints                          = var.tempo_worker.constraints
+  worker_revision                             = var.tempo_worker.revision
+  compactor_worker_storage_directives         = var.tempo_worker.compactor_worker_storage_directives
+  distributor_worker_storage_directives       = var.tempo_worker.distributor_worker_storage_directives
+  ingester_worker_storage_directives          = var.tempo_worker.ingester_worker_storage_directives
+  metrics_generator_worker_storage_directives = var.tempo_worker.metrics_generator_worker_storage_directives
+  querier_worker_storage_directives           = var.tempo_worker.querier_worker_storage_directives
+  query_frontend_worker_storage_directives    = var.tempo_worker.query_frontend_worker_storage_directives
+  compactor_units                             = var.tempo_worker.compactor_units
+  distributor_units                           = var.tempo_worker.distributor_units
+  ingester_units                              = var.tempo_worker.ingester_units
+  metrics_generator_units                     = var.tempo_worker.metrics_generator_units
+  querier_units                               = var.tempo_worker.querier_units
+  query_frontend_units                        = var.tempo_worker.query_frontend_units
 }
 
 module "traefik" {
diff --git a/terraform/cos/variables.tf b/terraform/cos/variables.tf
index e8372714..46150c31 100644
--- a/terraform/cos/variables.tf
+++ b/terraform/cos/variables.tf
@@ -157,15 +157,17 @@ variable "loki_coordinator" {
 
 variable "loki_worker" {
   type = object({
-    backend_config     = optional(map(string), {})
-    read_config        = optional(map(string), {})
-    write_config       = optional(map(string), {})
-    constraints        = optional(string, "arch=amd64")
-    revision           = optional(number, null)
-    storage_directives = optional(map(string), {})
-    backend_units      = optional(number, 3)
-    read_units         = optional(number, 3)
-    write_units        = optional(number, 3)
+    backend_config             = optional(map(string), {})
+    read_config                = optional(map(string), {})
+    write_config               = optional(map(string), {})
+    constraints                = optional(string, "arch=amd64")
+    revision                   = optional(number, null)
+    backend_storage_directives = optional(map(string), {})
+    read_storage_directives    = optional(map(string), {})
+    write_storage_directives   = optional(map(string), {})
+    backend_units              = optional(number, 3)
+    read_units                 = optional(number, 3)
+    write_units                = optional(number, 3)
   })
   default     = {}
   description = "Application configuration for all Loki Workers. For more details: https://registry.terraform.io/providers/juju/juju/latest/docs/resources/application"
@@ -185,15 +187,17 @@ variable "mimir_coordinator" {
 
 variable "mimir_worker" {
   type = object({
-    backend_config     = optional(map(string), {})
-    read_config        = optional(map(string), {})
-    write_config       = optional(map(string), {})
-    constraints        = optional(string, "arch=amd64")
-    revision           = optional(number, null)
-    storage_directives = optional(map(string), {})
-    backend_units      = optional(number, 3)
-    read_units         = optional(number, 3)
-    write_units        = optional(number, 3)
+    backend_config             = optional(map(string), {})
+    read_config                = optional(map(string), {})
+    write_config               = optional(map(string), {})
+    constraints                = optional(string, "arch=amd64")
+    revision                   = optional(number, null)
+    backend_storage_directives = optional(map(string), {})
+    read_storage_directives    = optional(map(string), {})
+    write_storage_directives   = optional(map(string), {})
+    backend_units              = optional(number, 3)
+    read_units                 = optional(number, 3)
+    write_units                = optional(number, 3)
   })
   default     = {}
   description = "Application configuration for all Mimir Workers. For more details: https://registry.terraform.io/providers/juju/juju/latest/docs/resources/application"
@@ -254,21 +258,26 @@ variable "tempo_coordinator" {
 
 variable "tempo_worker" {
   type = object({
-    querier_config           = optional(map(string), {})
-    query_frontend_config    = optional(map(string), {})
-    ingester_config          = optional(map(string), {})
-    distributor_config       = optional(map(string), {})
-    compactor_config         = optional(map(string), {})
-    metrics_generator_config = optional(map(string), {})
-    constraints              = optional(string, "arch=amd64")
-    revision                 = optional(number, null)
-    storage_directives       = optional(map(string), {})
-    compactor_units          = optional(number, 3)
-    distributor_units        = optional(number, 3)
-    ingester_units           = optional(number, 3)
-    metrics_generator_units  = optional(number, 3)
-    querier_units            = optional(number, 3)
-    query_frontend_units     = optional(number, 3)
+    querier_config                              = optional(map(string), {})
+    query_frontend_config                       = optional(map(string), {})
+    ingester_config                             = optional(map(string), {})
+    distributor_config                          = optional(map(string), {})
+    compactor_config                            = optional(map(string), {})
+    metrics_generator_config                    = optional(map(string), {})
+    constraints                                 = optional(string, "arch=amd64")
+    revision                                    = optional(number, null)
+    compactor_worker_storage_directives         = optional(map(string), {})
+    distributor_worker_storage_directives       = optional(map(string), {})
+    ingester_worker_storage_directives          = optional(map(string), {})
+    metrics_generator_worker_storage_directives = optional(map(string), {})
+    querier_worker_storage_directives           = optional(map(string), {})
+    query_frontend_worker_storage_directives    = optional(map(string), {})
+    compactor_units                             = optional(number, 3)
+    distributor_units                           = optional(number, 3)
+    ingester_units                              = optional(number, 3)
+    metrics_generator_units                     = optional(number, 3)
+    querier_units                               = optional(number, 3)
+    query_frontend_units                        = optional(number, 3)
   })
   default     = {}
   description = "Application configuration for all Tempo workers. For more details: https://registry.terraform.io/providers/juju/juju/latest/docs/resources/application"
diff --git a/terraform/loki/README.md b/terraform/loki/README.md
index c3fa27c0..f826c447 100644
--- a/terraform/loki/README.md
+++ b/terraform/loki/README.md
@@ -29,6 +29,7 @@ This is a Terraform module facilitating the deployment of Loki solution, using t
 | <a name="input_backend_config"></a> [backend\_config](#input\_backend\_config) | Map of the backend worker configuration options | `map(string)` | `{}` | no |
 | <a name="input_backend_name"></a> [backend\_name](#input\_backend\_name) | Name of the Loki app with the backend role | `string` | `"loki-backend"` | no |
 | <a name="input_backend_units"></a> [backend\_units](#input\_backend\_units) | Number of Loki worker units with the backend role | `number` | `1` | no |
+| <a name="input_backend_worker_storage_directives"></a> [backend\_worker\_storage\_directives](#input\_backend\_worker\_storage\_directives) | Map of storage used by the backend worker application, which defaults to 1 GB, allocated by Juju | `map(string)` | `{}` | no |
 | <a name="input_channel"></a> [channel](#input\_channel) | Channel that the applications are deployed from | `string` | n/a | yes |
 | <a name="input_coordinator_config"></a> [coordinator\_config](#input\_coordinator\_config) | Map of the coordinator configuration options | `map(string)` | `{}` | no |
 | <a name="input_coordinator_constraints"></a> [coordinator\_constraints](#input\_coordinator\_constraints) | String listing constraints for the coordinator application | `string` | `"arch=amd64"` | no |
@@ -39,6 +40,7 @@ This is a Terraform module facilitating the deployment of Loki solution, using t
 | <a name="input_read_config"></a> [read\_config](#input\_read\_config) | Map of the read worker configuration options | `map(string)` | `{}` | no |
 | <a name="input_read_name"></a> [read\_name](#input\_read\_name) | Name of the Loki app with the read role | `string` | `"loki-read"` | no |
 | <a name="input_read_units"></a> [read\_units](#input\_read\_units) | Number of Loki worker units with the read role | `number` | `1` | no |
+| <a name="input_read_worker_storage_directives"></a> [read\_worker\_storage\_directives](#input\_read\_worker\_storage\_directives) | Map of storage used by the read worker application, which defaults to 1 GB, allocated by Juju | `map(string)` | `{}` | no |
 | <a name="input_s3_access_key"></a> [s3\_access\_key](#input\_s3\_access\_key) | S3 access-key credential | `string` | n/a | yes |
 | <a name="input_s3_bucket"></a> [s3\_bucket](#input\_s3\_bucket) | Bucket name | `string` | `"loki"` | no |
 | <a name="input_s3_endpoint"></a> [s3\_endpoint](#input\_s3\_endpoint) | S3 endpoint | `string` | n/a | yes |
@@ -52,10 +54,10 @@ This is a Terraform module facilitating the deployment of Loki solution, using t
 | <a name="input_s3_secret_key"></a> [s3\_secret\_key](#input\_s3\_secret\_key) | S3 secret-key credential | `string` | n/a | yes |
 | <a name="input_worker_constraints"></a> [worker\_constraints](#input\_worker\_constraints) | String listing constraints for the worker application | `string` | `"arch=amd64"` | no |
 | <a name="input_worker_revision"></a> [worker\_revision](#input\_worker\_revision) | Revision number of the worker application | `number` | `null` | no |
-| <a name="input_worker_storage_directives"></a> [worker\_storage\_directives](#input\_worker\_storage\_directives) | Map of storage used by the worker application, which defaults to 1 GB, allocated by Juju | `map(string)` | `{}` | no |
 | <a name="input_write_config"></a> [write\_config](#input\_write\_config) | Map of the write worker configuration options | `map(string)` | `{}` | no |
 | <a name="input_write_name"></a> [write\_name](#input\_write\_name) | Name of the Loki app with the write role | `string` | `"loki-write"` | no |
 | <a name="input_write_units"></a> [write\_units](#input\_write\_units) | Number of Loki worker units with the write role | `number` | `1` | no |
+| <a name="input_write_worker_storage_directives"></a> [write\_worker\_storage\_directives](#input\_write\_worker\_storage\_directives) | Map of storage used by the write worker application, which defaults to 1 GB, allocated by Juju | `map(string)` | `{}` | no |
 
 ## Outputs
 
diff --git a/terraform/loki/main.tf b/terraform/loki/main.tf
index 138d26bb..bd4465e9 100644
--- a/terraform/loki/main.tf
+++ b/terraform/loki/main.tf
@@ -60,7 +60,7 @@ module "loki_backend" {
   }, var.backend_config)
   model_uuid         = var.model_uuid
   revision           = var.worker_revision
-  storage_directives = var.worker_storage_directives
+  storage_directives = var.backend_worker_storage_directives
   units              = var.backend_units
 }
 
@@ -76,7 +76,7 @@ module "loki_read" {
   }, var.read_config)
   model_uuid         = var.model_uuid
   revision           = var.worker_revision
-  storage_directives = var.worker_storage_directives
+  storage_directives = var.read_worker_storage_directives
   units              = var.read_units
 }
 
@@ -92,7 +92,7 @@ module "loki_write" {
   }, var.write_config)
   model_uuid         = var.model_uuid
   revision           = var.worker_revision
-  storage_directives = var.worker_storage_directives
+  storage_directives = var.write_worker_storage_directives
   units              = var.write_units
 }
 
diff --git a/terraform/loki/variables.tf b/terraform/loki/variables.tf
index c3676c6f..46f5bbd8 100644
--- a/terraform/loki/variables.tf
+++ b/terraform/loki/variables.tf
@@ -172,8 +172,20 @@ variable "coordinator_storage_directives" {
   default     = {}
 }
 
-variable "worker_storage_directives" {
-  description = "Map of storage used by the worker application, which defaults to 1 GB, allocated by Juju"
+variable "backend_worker_storage_directives" {
+  description = "Map of storage used by the backend worker application, which defaults to 1 GB, allocated by Juju"
+  type        = map(string)
+  default     = {}
+}
+
+variable "read_worker_storage_directives" {
+  description = "Map of storage used by the read worker application, which defaults to 1 GB, allocated by Juju"
+  type        = map(string)
+  default     = {}
+}
+
+variable "write_worker_storage_directives" {
+  description = "Map of storage used by the write worker application, which defaults to 1 GB, allocated by Juju"
   type        = map(string)
   default     = {}
 }
diff --git a/terraform/mimir/README.md b/terraform/mimir/README.md
index db9b0698..2b04d652 100644
--- a/terraform/mimir/README.md
+++ b/terraform/mimir/README.md
@@ -29,6 +29,7 @@ This is a Terraform module facilitating the deployment of Mimir solution, using
 | <a name="input_backend_config"></a> [backend\_config](#input\_backend\_config) | Map of the backend worker configuration options | `map(string)` | `{}` | no |
 | <a name="input_backend_name"></a> [backend\_name](#input\_backend\_name) | Name of the Mimir backend (meta role) app | `string` | `"mimir-backend"` | no |
 | <a name="input_backend_units"></a> [backend\_units](#input\_backend\_units) | Number of Mimir worker units with the backend meta role | `number` | `1` | no |
+| <a name="input_backend_worker_storage_directives"></a> [backend\_worker\_storage\_directives](#input\_backend\_worker\_storage\_directives) | Map of storage used by the backend worker application, which defaults to 1 GB, allocated by Juju | `map(string)` | `{}` | no |
 | <a name="input_channel"></a> [channel](#input\_channel) | Channel that the applications are deployed from | `string` | n/a | yes |
 | <a name="input_coordinator_config"></a> [coordinator\_config](#input\_coordinator\_config) | Map of the coordinator configuration options | `map(string)` | `{}` | no |
 | <a name="input_coordinator_constraints"></a> [coordinator\_constraints](#input\_coordinator\_constraints) | String listing constraints for the coordinator application | `string` | `"arch=amd64"` | no |
@@ -39,6 +40,7 @@ This is a Terraform module facilitating the deployment of Mimir solution, using
 | <a name="input_read_config"></a> [read\_config](#input\_read\_config) | Map of the read worker configuration options | `map(string)` | `{}` | no |
 | <a name="input_read_name"></a> [read\_name](#input\_read\_name) | Name of the Mimir read (meta role) app | `string` | `"mimir-read"` | no |
 | <a name="input_read_units"></a> [read\_units](#input\_read\_units) | Number of Mimir worker units with the read meta role | `number` | `1` | no |
+| <a name="input_read_worker_storage_directives"></a> [read\_worker\_storage\_directives](#input\_read\_worker\_storage\_directives) | Map of storage used by the read worker application, which defaults to 1 GB, allocated by Juju | `map(string)` | `{}` | no |
 | <a name="input_s3_access_key"></a> [s3\_access\_key](#input\_s3\_access\_key) | S3 access-key credential | `string` | n/a | yes |
 | <a name="input_s3_bucket"></a> [s3\_bucket](#input\_s3\_bucket) | Bucket name | `string` | `"mimir"` | no |
 | <a name="input_s3_endpoint"></a> [s3\_endpoint](#input\_s3\_endpoint) | S3 endpoint | `string` | n/a | yes |
@@ -52,10 +54,10 @@ This is a Terraform module facilitating the deployment of Mimir solution, using
 | <a name="input_s3_secret_key"></a> [s3\_secret\_key](#input\_s3\_secret\_key) | S3 secret-key credential | `string` | n/a | yes |
 | <a name="input_worker_constraints"></a> [worker\_constraints](#input\_worker\_constraints) | String listing constraints for the worker application | `string` | `"arch=amd64"` | no |
 | <a name="input_worker_revision"></a> [worker\_revision](#input\_worker\_revision) | Revision number of the worker application | `number` | `null` | no |
-| <a name="input_worker_storage_directives"></a> [worker\_storage\_directives](#input\_worker\_storage\_directives) | Map of storage used by the worker application, which defaults to 1 GB, allocated by Juju | `map(string)` | `{}` | no |
 | <a name="input_write_config"></a> [write\_config](#input\_write\_config) | Map of the write worker configuration options | `map(string)` | `{}` | no |
 | <a name="input_write_name"></a> [write\_name](#input\_write\_name) | Name of the Mimir write (meta role) app | `string` | `"mimir-write"` | no |
 | <a name="input_write_units"></a> [write\_units](#input\_write\_units) | Number of Mimir worker units with the write meta role | `number` | `1` | no |
+| <a name="input_write_worker_storage_directives"></a> [write\_worker\_storage\_directives](#input\_write\_worker\_storage\_directives) | Map of storage used by the write worker application, which defaults to 1 GB, allocated by Juju | `map(string)` | `{}` | no |
 
 ## Outputs
 
diff --git a/terraform/mimir/main.tf b/terraform/mimir/main.tf
index 92b030b8..98ee580b 100644
--- a/terraform/mimir/main.tf
+++ b/terraform/mimir/main.tf
@@ -61,7 +61,7 @@ module "mimir_backend" {
   }, var.backend_config)
   model_uuid         = var.model_uuid
   revision           = var.worker_revision
-  storage_directives = var.worker_storage_directives
+  storage_directives = var.backend_worker_storage_directives
   units              = var.backend_units
 }
 
@@ -77,7 +77,7 @@ module "mimir_read" {
   constraints        = var.anti_affinity ? "arch=amd64 tags=anti-pod.app.kubernetes.io/name=${var.read_name},anti-pod.topology-key=kubernetes.io/hostname" : var.worker_constraints
   model_uuid         = var.model_uuid
   revision           = var.worker_revision
-  storage_directives = var.worker_storage_directives
+  storage_directives = var.read_worker_storage_directives
   units              = var.read_units
 }
 
@@ -93,7 +93,7 @@ module "mimir_write" {
   constraints        = var.anti_affinity ? "arch=amd64 tags=anti-pod.app.kubernetes.io/name=${var.write_name},anti-pod.topology-key=kubernetes.io/hostname" : var.worker_constraints
   model_uuid         = var.model_uuid
   revision           = var.worker_revision
-  storage_directives = var.worker_storage_directives
+  storage_directives = var.write_worker_storage_directives
   units              = var.write_units
 }
 
diff --git a/terraform/mimir/variables.tf b/terraform/mimir/variables.tf
index fa908ce8..f4f717fd 100644
--- a/terraform/mimir/variables.tf
+++ b/terraform/mimir/variables.tf
@@ -172,8 +172,20 @@ variable "coordinator_storage_directives" {
   default     = {}
 }
 
-variable "worker_storage_directives" {
-  description = "Map of storage used by the worker application, which defaults to 1 GB, allocated by Juju"
+variable "backend_worker_storage_directives" {
+  description = "Map of storage used by the backend worker application, which defaults to 1 GB, allocated by Juju"
+  type        = map(string)
+  default     = {}
+}
+
+variable "read_worker_storage_directives" {
+  description = "Map of storage used by the read worker application, which defaults to 1 GB, allocated by Juju"
+  type        = map(string)
+  default     = {}
+}
+
+variable "write_worker_storage_directives" {
+  description = "Map of storage used by the write worker application, which defaults to 1 GB, allocated by Juju"
   type        = map(string)
   default     = {}
 }