[Gluster-users] simple AFR setup, one server crashes, entire cluster becomes unusable ?
Keith Freedman
freedman at FreeFormIT.com
Tue Dec 9 17:36:30 UTC 2008
At 09:28 AM 12/9/2008, Stas Oskin wrote:
>Hi.
>
>Thanks for the example, but how actually server-side AFR works?
>
>I mean, when you put a file on one server, it writes to the second
>one? And vice-versa?
yes.
client 1 updates file on server 1. server 1 and server 2 (if AFR'ed)
communicate and server 1 pushes file to server 2.
Client 1 reads file from server 1. Server 1 and server 2 coordinate
to see if they are already in sync. if so, server 1 sends file to
client 1. if not server 1 gets newer version first then send to client 1.
>Regards.
>
>here's my server configs:
>
>volume home1
> type storage/posix # POSIX FS translator
> option directory /gluster/home # Export this directory
>end-volume
>
>volume posix-locks-home1
> type features/posix-locks
> option mandatory on
> subvolumes home1
>end-volume
>
>## Reference volume "home2" from remote server
>volume home2
> type protocol/client # POSIX FS translator
> option transport-type tcp/client
> option remote-host <http://192.168.2.2>192.168.2.2 # IP
> address of remote host
> option remote-subvolume posix-locks-home1 # use home1 on remote host
> option transport-timeout 10
>end-volume
>
>### Create automatic file replication
>volume home
> type cluster/afr
> option read-subvolume posix-locks-home1
> subvolumes posix-locks-home1 home2
>end-volume
>
>### Add network serving capability to above home.
>volume server
> type protocol/server
> option transport-type tcp/server # For TCP/IP transport
> subvolumes posix-locks-home1
> option auth.addr.posix-locks-home1.allow
> <http://192.168.2.2>192.168.2.2,<http://127.0.0.1>127.0.0.1
>
>
>###I believe the following will do what you want, it's not exactly
>the same as mine since I added the auth option for the clients
>(192.168.1.x) to mount home--the AFR volume
> option auth.addr.home.allow
> <http://92.168.1.1>92.168.1.1,<http://192.168.1.2>192.168.1.2,<http://127.0.0.1>127.0.0.1
> #
>end-volume
>
>
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