慎用 AWS 中国 S3 Glacier

可能是个例，把遇到的情况发出来仅供参考

我厂在使用 AWS S3 Glacier 存储 Elasticsearch 快照，今天需要恢复大约 20 天的索引（按天建立的索引），总量约 1GB。

然而 Glacier 的解冻只能对每个对象进行解冻，不能使用通配符去解冻，当然可以使用 AWS cli 或 s3cmd 等工具来进行递归解冻。

问题就出在递归解冻上，每一个 Elasticsearch 索引快照会包含 100+ 的对象，所以每解冻一个快照索引都需要请求 100+ 次以上。

然而 AWS 中国 S3 Glacier 在请求 40+ 对象后就报错 503，尝试多次都是如此。

restore: 's3://BUCKET/index_20180401/1/__h'
restore: 's3://BUCKET/index_20180401/1/__i'
WARNING: Retrying failed request: /indices/index__20180401/1/__j?restore (503 (GlacierExpeditedRetrievalNotAvailable): Glacier expedited retrievals are currently not available, please try again later)
WARNING: Waiting 3 sec...
restore: 's3://BUCKET/index_20180401/1/__j'
WARNING: Retrying failed request: /indices/index__20180401/1/__k?restore (503 (GlacierExpeditedRetrievalNotAvailable): Glacier expedited retrievals are currently not available, please try again later)
WARNING: Waiting 3 sec...
WARNING: Retrying failed request: /indices/index__20180401/1/__k?restore (503 (GlacierExpeditedRetrievalNotAvailable): Glacier expedited retrievals are currently not available, please try again later)
WARNING: Waiting 6 sec...
WARNING: Retrying failed request: /indices/index__20180401/1/__k?restore (503 (GlacierExpeditedRetrievalNotAvailable): Glacier expedited retrievals are currently not available, please try again later)
WARNING: Waiting 9 sec...
WARNING: Retrying failed request: /indices/index__20180401/1/__k?restore (503 (GlacierExpeditedRetrievalNotAvailable): Glacier expedited retrievals are currently not available, please try again later)
WARNING: Waiting 12 sec...
WARNING: Retrying failed request: /indices/index__20180401/1/__k?restore (503 (GlacierExpeditedRetrievalNotAvailable): Glacier expedited retrievals are currently not available, please try again later)
WARNING: Waiting 15 sec...
ERROR: S3 error: 503 (GlacierExpeditedRetrievalNotAvailable): Glacier expedited retrievals are currently not available, please try again later

40+ 请求时间在 2 秒左右完成，大约 1 秒 20 个请求，如此大型的服务频率限制如此低？

目前还在联系 AWS 中国，询问具体原因，后续会附言更新