mirror of
https://github.com/ceph/ceph
synced 2025-01-08 20:21:33 +00:00
41 lines
901 B
Perl
41 lines
901 B
Perl
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$ rbd create --size 20M img
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$ DEV=$(sudo rbd map img)
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$ blockdev --getiomin $DEV
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65536
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$ blockdev --getioopt $DEV
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65536
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$ cat /sys/block/${DEV#/dev/}/queue/discard_granularity
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65536
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$ sudo rbd unmap $DEV
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$ DEV=$(sudo rbd map -o alloc_size=512 img)
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$ blockdev --getiomin $DEV
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512
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$ blockdev --getioopt $DEV
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512
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$ cat /sys/block/${DEV#/dev/}/queue/discard_granularity
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512
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$ sudo rbd unmap $DEV
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$ DEV=$(sudo rbd map -o alloc_size=4194304 img)
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$ blockdev --getiomin $DEV
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4194304
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$ blockdev --getioopt $DEV
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4194304
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$ cat /sys/block/${DEV#/dev/}/queue/discard_granularity
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4194304
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$ sudo rbd unmap $DEV
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$ DEV=$(sudo rbd map -o alloc_size=8388608 img)
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$ blockdev --getiomin $DEV
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4194304
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$ blockdev --getioopt $DEV
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4194304
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$ cat /sys/block/${DEV#/dev/}/queue/discard_granularity
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4194304
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$ sudo rbd unmap $DEV
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$ rbd rm --no-progress img
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