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feat(tvix/store/pathinfoservice/bigtable): stream rows

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Instead of collecting all rows into a Vec, use the stream_rows function,
and massage Ok values into the right shape.

This avoids collecting everything into memory.

Change-Id: I2f03434c7e1e25ee8395c69685b16100aec36f89
Reviewed-on: https://cl.tvl.fyi/c/depot/+/13163
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: Connor Brewster <cbrewster@hey.com>
This commit is contained in:
Florian Klink 2025-02-20 11:41:15 +07:00 • committed by clbot
parent 299d957df7
commit 22d68b3100
1 changed files with 17 additions and 11 deletions
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28
tvix/store/src/pathinfoservice/bigtable.rs
View file

@ -11,7 +11,7 @@ use serde::{Deserialize, Serialize};
use serde_with::{serde_as, DurationSeconds};
use std::sync::Arc;
use tonic::async_trait;
use tracing::{instrument, trace};
use tracing::{instrument, trace, warn, Span};
use tvix_castore::composition::{CompositionContext, ServiceBuilder};
use tvix_castore::Error;
@ -318,22 +318,22 @@ impl PathInfoService for BigtablePathInfoService {
};
let stream = try_stream! {
// TODO: add pagination, we don't want to hold all of this in memory.
let response = client
.read_rows(request)
let mut rows = client
.stream_rows(request)
.await
.map_err(|e| Error::StorageError(format!("unable to read rows: {}", e)))?;
.map_err(|e| Error::StorageError(format!("unable to read rows: {}", e)))?.enumerate();
use futures::stream::StreamExt;
while let Some((i, elem)) = rows.next().await {
let (row_key, mut cells) = elem.map_err(|e| Error::StorageError(format!("unable to stream row {}: {}", i, e)))?;
let span = Span::current();
span.record("row.key", bstr::BStr::new(&row_key).to_string());
for (row_key, mut cells) in response {
let cell = cells
.pop()
.ok_or_else(|| Error::StorageError("found no cells".into()))?;
// The cell must have the same qualifier as the row key
if row_key != cell.qualifier {
Err(Error::StorageError("unexpected cell qualifier".into()))?;
}
// Ensure there's only one cell (so no more left after the pop())
// This shouldn't happen, We filter out other cells in our query.
if !cells.is_empty() {
@ -343,6 +343,12 @@ impl PathInfoService for BigtablePathInfoService {
))?
}
// The cell must have the same qualifier as the row key
if row_key != cell.qualifier {
warn!("unexpected cell qualifier");
Err(Error::StorageError("unexpected cell qualifier".into()))?;
}
// Try to parse the value into a PathInfo message.
let path_info_proto = proto::PathInfo::decode(Bytes::from(cell.value))
.map_err(|e| Error::StorageError(format!("unable to decode pathinfo proto: {}", e)))?;