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+# pict-rs 0.4.5
+
+## Overview
+
+pict-rs 0.4.5 contains a new commandline option for improving throughput when migrating storage, as
+well as a change in behavior for the delete endpoint. Additionally there are a few dependency
+upgrades.
+
+### Features
+
+- [Migration Concurrency](#migration-concurrency)
+
+
+### Changes
+
+- [Inline Delete](#inline-delete)
+
+
+## Upgrade Notes
+
+There's no significant changes from 0.4.4, so upgrading should be as simple as pulling a new version
+of pict-rs.
+
+
+## Descriptions
+
+### Migration Concurrency
+
+When migrating from filesystem storage to object storage, pict-rs initially migrated every file
+sequentially. This was extremely slow, so in 0.4.1 this was made concurrent. Since then, the object
+storage migration has moved 32 files at a time. This still might be too slow for some large
+deployments, so pict-rs 0.4.5 is making this value configurable.
+
+Thew new `--concurrency` flag can be passed to the `migrate-store` subcommand with any integer
+value. By default, pict-rs sets this value to 32, but for large deployments, setting it to 128, 256,
+or even 512 might be useful. Note that increasing the concurrency will increase the number of
+connections to the object storage provider.
+
+Example:
+```bash
+$ pict-rs \
+    migrate-store \
+        --concurrency 32 \
+    filesystem \
+        -p /path/to/files \
+    object-storage \
+        -e https://object-storage-endpoint \
+        -b bucket-name \
+        -r region \
+        -a access-key \
+        -s secret-key \
+    sled \
+        -p /path/to/sled-repo
+```
+
+
+### Inline Delete
+
+Previously, the endpoint for deleting images would always return an HTTP 204 status after queueing a
+job to delete the image. This meant that if an invalid `delete token` was provided, or if the
+deletion failed for some other reason, the client making the request would not be informed of this.
+pict-rs 0.4.5 now performs this deletion inline to ensure the client is made aware of problems.