bvandeusenandClaude Opus 5.5
5259caa846
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The daily recovery reset every dead link to a fresh three-attempt budget, so a link that can never succeed (an archive too big to import inside the fetch's hard limit, a file made private) was downloaded up to three times a day, every day. Recovery now gives a dead link one more attempt once it has been dead for 2**recoveries days (1, 2, 4, 8, 16), and stops after five. A recovered link that fails again goes straight back to dead. Retention prunes only links recovery has given up on, 30 days after their last attempt. A manual refetch of a post restores the full budgets. Migration 0118 adds external_link.recoveries. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
33 lines
768 B
Python
33 lines
768 B
Python
"""external_link.recoveries: how many times recovery has retried a dead link.
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The daily recovery gives a dead link one more attempt, spaced further apart
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each time, and leaves it dead once the count reaches its limit. A link that
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can never succeed is then downloaded a handful of times in total, not every
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day.
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Revision ID: 0118
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Revises: 0117
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Create Date: 2026-11-05
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"""
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import sqlalchemy as sa
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from alembic import op
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revision = "0118"
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down_revision = "0117"
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branch_labels = None
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depends_on = None
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def upgrade() -> None:
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op.add_column(
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"external_link",
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sa.Column(
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"recoveries", sa.Integer(), nullable=False, server_default=sa.text("0")
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),
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)
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def downgrade() -> None:
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op.drop_column("external_link", "recoveries")
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