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Amazon Glacier
の落とし穴
株式会社HDE
岩立 将和 (IWATATE, Masakazu)
2014-04-25 アカリク&HDE 合同勉強会
Amazon Glacier
● 安価なストレージ
○ S3: ¥3.30/GB/月
○ Glacier: ¥1.14/GB/月
● ただし、取り出しには3〜5時間かかる
取り出し時間を許容できるのであれば、
めったに取り出さないデータを
安価で保存できる
※ $1==¥100 (税別)
直接使用 or S3の一部として使用
Amazon S3
S3 Bucket
Standard Storage
Reduced Redundancy
Storage
Glacier Storage
Object
(ファイル)
Amazon Glacier
Glacier Vault
Glacier
Archive
S3のストレージクラス比較
Standard
Storage
Reduced
Redundancy
Storage (RRS)
Glacier Storage
GET 即時可能 即時可能 3〜5時間待ち(目安)
ストレージ料金 〜¥3.30/GB/月 〜¥2.64/GB/月 〜¥1.14/GB/月
耐久性(ファイルの
平均年間予測喪失
率)
99.999999999%
(1000億ファイル
あたり1件)
99.99%
(1万ファイルあたり
1件)
99.999999999%
(1000億ファイルあたり1
件)
Glacier StorageからのGET
Standard
Storage
(GET可能)
Reduced
Redundancy
Storage
(GET可能)
Glacier
Storage
ファイル S3 Bucketに
移動ルールを指定し
ておくと、自動的に移
動される
GETしたくなったら、
復元操作を行う
一定期間、コピーが
RRSに置かれる3〜5時間
数日(期間を指定する)
1日程度
PUT
GET
落とし穴
S3のリクエスト料金表(東京)
● 例: 100GBのファイルを1個復元した
○ 100GB / 4時間 = 25GB/時
○ 復元料金は毎月のピーク復元レートに基づいて計算
■ 25GB/時 * 24時間 * 30日 * ¥1.14 = ¥20,520/月
GB/時
0
25
4/1 00:00 4/30 23:59
100GB
Glacier データ復元料金
18,000GB
0
25
0
25
¥20,520
¥20,520
¥20,520
身に覚えのない請求書
「$181で最大15TB復元できる」という意味。
「あなたは15TB復元しました」という意味ではない。
(実際は90GB程度しか復元していない。)
GB/時
0
30,720
4/1 00:00 4/30 23:59
120TB
21PB
0
30,720
0
30,720
2,521万円
5,127万円
2,521万円
120TBを(まちがって)
復元してしまうと...
月額なので...
4月 5月
2,521万円
(30日分)
2,606万円
(31日分)
「無料で復元できるのは、1 か月当たり、お客様の月平均
Glacier 保管量の 5% まで(1 日ごとに案分)です。」
● 120TB * 5% = 6144GB
● 6144 / 30日 = 205GB (0.17%)
GB/時
4/1 00:00 4/30 23:59
6144GB
0
8.5 無料
122万円
(1,485GB/時 相当)
4/5 10:00 13:59
205GB
0
51
無料
4/5 00:00 04:00 23:59
200GB
0
50
¥34,063
(41.5GB/時 相当)
5GB
8.5
4/5 10:00 13:59
6144
GB
0
1,536
51
ファイルサイズに注意
大きすぎると復元料金が高額になる
 例) 5TBのファイル1個 (1.25TB/時): 105万円
細かすぎる(ファイル数が多い)とリクエスト料金が
高額になる
 例) 1億個のファイルをPUT
● Standard Storage: ¥47,000
● Glacier Storage: ¥571,000
まとめ: Glacierの利用は計画的に
● 料金体系の詳細を把握した上で利用する
● 復元リクエスト状況を一括管理する
● 計画的に使えば安価
○ ストレージ料金: たとえば120TBの場合
■ Standard Storage: 40万円/月
■ Glacier Storage: 14万円/月
○ 復元料金: たとえば「25GB/時 (最大18TB/月) の復元枠
を¥20,520で買う」と考える
参考資料 / 料金計算機
http://aws.amazon.
com/s3/faqs/#How_will_I_be_charged_when_restoring_lar
ge_amounts_of_data_from_Amazon_Glacier
Example 1: Archiving 75TB of data to Amazon Glacier and restoring
140GB in 4 hours.
First we calculate your peak restore rate. Your peak hourly restore rate
each month is equal to the greatest amount of data you restore in any hour
over the course of the month. If you initiate several restores in the same
hour, these are added together to determine your hourly restore rate. We
always assume that a restore request completes in 4 hours for the
purpose of calculating your peak restore rate. In this case your peak
rate is 140GB/4 hours, which equals 35 GB per hour.
Unofficial Amazon AWS Glacier Calculator
 http://liangzan.net/aws-glacier-calculator/

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Amazon Glacier の落とし穴