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import redis
from django.conf import settings
from django.core.management import BaseCommand
'''
日记相关redis 部分和gaia 分隔
'''
class Command(BaseCommand):
def add_arguments(self, parser):
parser.add_argument('-t', '--test', action='store_true',
help="Run test for redis migrate, a redis server should run on localhost:6379")
parser.add_argument('-m', '--migrate', action='store_true', help="Redis data migrate")
def handle(self, *args, **options):
"""
redis migrate.
:param args:
:param options:
:return:
"""
for rd in settings.REDIS_MIGRATE_TALOS:
for prefix in rd['prefix']:
self.migrate_v2(rd['source'], rd['target'], prefix=prefix)
def migrate_v2(self, source, target, prefix=""):
"""
适用于:redis >= 2.6
:param source:
:param target:
:param prefix:
:return:
"""
self.stdout.write(self.style.SUCCESS(
"Start to migrate from %s to %s, prefix: %s" % (
"redis://" + source['host'] + ":" + str(source['port']) + "/" + str(source['db']),
"redis://" + target['host'] + ":" + str(target['port']) + "/" + str(target['db']),
prefix
)
))
src_rd = redis.StrictRedis(**source)
dst_rd = redis.StrictRedis(**target)
total = len(src_rd.keys(prefix + "*"))
for key in src_rd.keys(prefix + "*"):
try:
""" redis> SET """
v = src_rd.get(key)
dst_rd.set(key, v)
except redis.exceptions.ResponseError:
""" redis> HSET """
try:
v = src_rd.hgetall(key)
dst_rd.hmset(key, v)
except redis.exceptions.ResponseError:
"""redis> ZADD """
zv = src_rd.zrange(key, 0, -1, withscores=True)
v = {key.decode(): value for key, value in zv}
dst_rd.zadd(key, **v)
self.stdout.write(self.style.SUCCESS("Migrate success: %s key." % total))