John Spray

Only shard zero maintains accurate relation sizes. Currently, other shards calculate their own logical size (which can be smaller than the real one), which is a waste of resources, and...

```[tasklist] ### Tasks - [ ] Compaction: figure out if gap detection needs to be made stripe-aware to avoid spuriously splitting layers - [ ] https://github.com/neondatabase/neon/issues/5953 - [ ] initdb...

For example, RemoteTimelineClientMetrics has a `tenant_id` label but no shard label. In general, anything with a tenant label will also need a shard label. It is probably better to have...

pageserver: cancellation for remote ops in tenant deletion on shutdown

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## Problem ## Summary of changes ## Checklist before requesting a review - [ ] I have performed a self-review of my code. - [ ] If it is a...

control_plane: generalize attachment_service to handle sharding

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This PR includes commits from: - #6246 - #6205 ## Problem To test sharding, we need something to control it. We could write python code for doing this from the...

docs: sharding phase 1 RFC

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We need to shard our Tenants to support larger databases without those large databases dominating our pageservers and/or requiring dedicated pageservers. This RFC aims to define an initial capability that...

pageserver: eviction for secondary mode tenants

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Follows #6123 Closes: #evictionhttps://github.com/neondatabase/neon/issues/5342 The approach here is to avoid using `Layer` from secondary tenants, and instead make the eviction types (e.g. `EvictionCandidate`) have a variant that carries a Layer...

`Error: timelines dir not empty: Timelines directory is not empty after all timelines deletion: ["initdb.tar.zst.upload-.___temp"]` This happens when deletion races with creation. Timeline deletion code should remove this file if...

In this test failure, postgres is getting "Cannot assign requested address" errors, which may be a test environment issue (run out of ports?). It appears to be reconnecting more frequently...