Jianjian Huo 71d507f8e1 Proxy: restructure cached listing shard ranges ...

Updating shard range cache has been restructured and upgraded to v2
which only persist the essential attributes in memcache (see
Related-Change). This is the following patch to restructure the
listing shard ranges cache for object listing in the same way.

UpgradeImpact
=============
The cache key for listing shard ranges in memcached is renamed
from 'shard-listing/<account>/<container>' to
'shard-listing-v2/<account>/<container>', and cache data is
changed to be a list of [lower bound, name]. As a result, this
will invalidate all existing listing shard ranges stored in the
memcache cluster.

Co-Authored-By: Alistair Coles <alistairncoles@gmail.com>
Related-Change: If98af569f99aa1ac79b9485ce9028fdd8d22576b
Change-Id: I54a32fd16e3d02b00c18b769c6f675bae3ba8e01

2023-04-17 09:49:26 -07:00

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