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module Gitlab
module HashedStorage
# Hashed Storage Migrator
#
# This is responsible for scheduling and flagging projects
# to be migrated from Legacy to Hashed storage, either one by one or in bulk.
class Migrator
BATCH_SIZE = 100
# Schedule a range of projects to be bulk migrated with #bulk_migrate asynchronously
#
# @param [Object] start first project id for the range
# @param [Object] finish last project id for the range
def bulk_schedule(start, finish)
StorageMigratorWorker.perform_async(start, finish)
end
# Start migration of projects from specified range
#
# Flagging a project to be migrated is a synchronous action,
# but the migration runs through async jobs
#
# @param [Object] start first project id for the range
# @param [Object] finish last project id for the range
def bulk_migrate(start, finish)
projects = build_relation(start, finish)
projects.with_route.find_each(batch_size: BATCH_SIZE) do |project|
migrate(project)
end
end
# Flag a project to me migrated
#
# @param [Object] project that will be migrated
def migrate(project)
Rails.logger.info "Starting storage migration of #{project.full_path} (ID=#{project.id})..."
project.migrate_to_hashed_storage!
rescue => err
Rails.logger.error("#{err.message} migrating storage of #{project.full_path} (ID=#{project.id}), trace - #{err.backtrace}")
end
private
def build_relation(start, finish)
relation = Project
table = Project.arel_table
relation = relation.where(table[:id].gteq(start)) if start
relation = relation.where(table[:id].lteq(finish)) if finish
relation
end
end
end
end
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