drbd9資料 osc発表

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DRBD 9.0

2013-02

2

! DRBD Distributed Replicated Block Device

DRBD

Host2

Network

Host1

3

DRBD

! 4

Host3 Host4

Host1

Host2

Stacked

Stacked

4

DRBD

! ! /dev/drbdN ! ! LVMMD

! Primary ! Secanday

!

5

.1:

6

Primary

Secondary

Secondary

! : 112 (4)

! :

7

! (create-md) ! ! 32 ! PrimarySecondary !

8

:

1

2

9

:

3

3

6

4

n (

n

1 )

2

n

1

2

10

vs

Secondary

Secondary

Primary

Stacked

Primary

Stacked

! !

11

vs

Secondary

Primary

Secondary

! !

12

! 8.3 ! )

! 8.4 !

! 9.0 !

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8.3 Objects

14

8.4 Objects

1

n

15

9.0 Objects

1

n

1

n

1 m

1 m

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drbdadm arguments

1

n

1

n

1 m

1 mdrbdadm res ... drbdadm conn@res ...

drbdadm conn@res...drbdadm res/0 ...

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: resource example { volume 0 {...} volume 1 {...} on alice { node-id 0; address 10.0.42.1:7001; } on bob { node-id 1; address 10.0.42.2:7002; } on rick { node-id 2; address 10.0.42.3:7003; } connection { host alice port 7001; host bob port 7002; } connection {

host rick port 7003; } connection {...} }

host bob port 7002;

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: id ! 031 ! ! ! idDRBD

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! net ! ... ! ...

!

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.2:

22

8.x

# drbdadm primary res Primary

# mount /dev/drbd0

..

# umount /dev/drbd0

# drbdadm secondary resSecondary

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9.0

# mount /dev/drbd0

..

# umount /dev/drbd0

# drbdadm primary res Primary

# drbdadm secondary resSecondary

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! Primary

! Primary ! ! Secondary ! Pacemaker

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.3:

26

Source

Target

Target

! 1 ! (--force primary)

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! !

Paused Source

Target Paused

Source

28

Primary

Secondary

Secondary

! Primary

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! Primary !

Primary

Secondary

Secondary Target

Source

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.4:

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! drbdsetup status ! --statistics ! --verbose ! drbdadm status ! /proc/drbd DRBD

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3

33

34

()

! 2 ! =

! ! 2Primary ! UDP multicast transport

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