browsertrix/backend/btrixcloud/migrations/migration_0042_page_filenames.py
Tessa Walsh f8fb2d2c8d
Rework crawl page migration + MongoDB Query Optimizations (#2412)
Fixes #2406 

Converts migration 0042 to launch a background job (parallelized across
several pods) to migrate all crawls by optimizing their pages and
setting `version: 2` on the crawl when complete.

Also Optimizes MongoDB queries for better performance.

Migration Improvements:

- Add `isMigrating` and `version` fields to `BaseCrawl`
- Add new background job type to use in migration with accompanying
`migration_job.yaml` template that allows for parallelization
- Add new API endpoint to launch this crawl migration job, and ensure
that we have list and retry endpoints for superusers that work with
background jobs that aren't tied to a specific org
- Rework background job models and methods now that not all background
jobs are tied to a single org
- Ensure new crawls and uploads have `version` set to `2`
- Modify crawl and collection replay.json endpoints to only include
fields for replay optimization (`initialPages`, `pageQueryUrl`,
`preloadResources`) if all relevant crawls/uploads have `version` set to
`2`
- Remove `distinct` calls from migration pathways
- Consolidate collection recompute stats

Query Optimizations:
- Remove all uses of $group and $facet
- Optimize /replay.json endpoints to precompute preload_resources, avoid
fetching crawl list twice
- Optimize /collections endpoint by not fetching resources 
- Rename /urls -> /pageUrlCounts and avoid $group, instead sort with
index, either by seed + ts or by url to get top matches.
- Use $gte instead of $regex to get prefix matches on URL
- Use $text instead of $regex to get text search on title
- Remove total from /pages and /pageUrlCounts queries by not using
$facet
- frontend: only call /pageUrlCounts when dialog is opened.


---------

Co-authored-by: Ilya Kreymer <ikreymer@gmail.com>
Co-authored-by: Emma Segal-Grossman <hi@emma.cafe>
Co-authored-by: Ilya Kreymer <ikreymer@users.noreply.github.com>
2025-02-20 15:26:11 -08:00

41 lines
1.1 KiB
Python

"""
Migration 0042 - Add filename to pages
"""
from btrixcloud.migrations import BaseMigration
MIGRATION_VERSION = "0042"
class Migration(BaseMigration):
"""Migration class."""
# pylint: disable=unused-argument
def __init__(self, mdb, **kwargs):
super().__init__(mdb, migration_version=MIGRATION_VERSION)
self.background_job_ops = kwargs.get("background_job_ops")
async def migrate_up(self):
"""Perform migration up.
Optimize crawl pages for optimized replay in background job by adding
filename, isSeed, depth, and favIconUrl as needed.
"""
if self.background_job_ops is None:
print(
"Unable to start background job to optimize pages, ops class missing",
flush=True,
)
return
try:
await self.background_job_ops.create_optimize_crawl_pages_job()
# pylint: disable=broad-exception-caught
except Exception as err:
print(
f"Unable to start background job to optimize pages: {err}",
flush=True,
)