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rbd striping
※ストライピング対応のイメージの作成
# rbd create --size 10 --stripe-unit 2097152 --stripe-count 2 --image-format 2 test3
※イメージ内のデータすべてを"0"(文字)で埋める(sample program)
# python bin/rbd_write.py test3 0 10 0
※2MB/4MB/6MB/8MB/10MBのユニットの境界にa~iの文字を書き込み(sample program)
# python bin/rbd_write.py test3 a 1 2097151
# python bin/rbd_write.py test3 b 1 2097152
# python bin/rbd_write.py test3 c 1 4194303
# python bin/rbd_write.py test3 d 1 4194304
# python bin/rbd_write.py test3 e 1 6291455
# python bin/rbd_write.py test3 f 1 6291456
# python bin/rbd_write.py test3 g 1 8388607
# python bin/rbd_write.py test3 h 1 8388608
# python bin/rbd_write.py test3 i 1 10485759
※radosからオブジェクトデータを取得
# rados get -p rbd rbd_data.26b12ae8944a.0000000000000000
# rados get -p rbd rbd_data.26b12ae8944a.0000000000000001
# rados get -p rbd rbd_data.26b12ae8944a.0000000000000002
※取得したデータを確認(4MB,4MB,2MBのデータになっています)
# ls -l rbd*
-rw-r--r-- 1 root root 4194304 Jun 24 11:43 rbd_data.26b12ae8944a.0000000000000000
-rw-r--r-- 1 root root 4194304 Jun 24 11:43 rbd_data.26b12ae8944a.0000000000000001
-rw-r--r-- 1 root root 2097152 Jun 24 11:43 rbd_data.26b12ae8944a.0000000000000002
※取得したオブジェクトデータのa~iのindexを確認
# python bin/check_offset.py test3/rbd_data.26b12ae8944a.0000000000000000 a
2097151
# python bin/check_offset.py test3/rbd_data.26b12ae8944a.0000000000000001 b
0
# python bin/check_offset.py test3/rbd_data.26b12ae8944a.0000000000000001 c
2097151
# python bin/check_offset.py test3/rbd_data.26b12ae8944a.0000000000000000 d
2097152
# python bin/check_offset.py test3/rbd_data.26b12ae8944a.0000000000000000 e
4194303
# python bin/check_offset.py test3/rbd_data.26b12ae8944a.0000000000000001 f
2097152
# python bin/check_offset.py test3/rbd_data.26b12ae8944a.0000000000000001 g
4194303
# python bin/check_offset.py test3/rbd_data.26b12ae8944a.0000000000000002 h
0
# python bin/check_offset.py test3/rbd_data.26b12ae8944a.0000000000000002 i
2097151
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