On Sat, 1 Mar 2008, Krishna Srinivas wrote:
Nathan,
Check the performance by bringing writebehind into the picture your
config file shows that WB and iocache translators are not being used.
Sorry, that was stupid, changed it to subvolumes nyc sjc_write-behind that
changed the delay to real 0m53.005s, still a far cry from .03 I get
local. This is only 748K, so I would expect it to write local and write
behind the 800K to the remote site.
On Sat, Mar 1, 2008 at 8:48 AM, <nathan@xxxxxxxxxxxx> wrote:
/etc/sysconfig is only 748K
cp /etc/sysconfig to /share/mirror took real 0m55.319s
cp /etc/sysconfig to /share took real 0m0.030s
I expected it to be much faster. :)
# Client
volume nyc
type protocol/client
option transport-type tcp/client
option remote-host 10.11.0.1
option remote-subvolume nyc
end-volume
volume sjc
type protocol/client
option transport-type tcp/client
option remote-host 10.12.0.1
option remote-subvolume sjc
end-volume
volume sjc_iocache
type performance/io-cache
option page-size 256KB
option page-count 2
subvolumes sjc
end-volume
volume sjc_write-behind
type performance/write-behind
option aggregate-size 1MB
option flush-behind on
subvolumes sjc_iocache
end-volume
volume mirror
type cluster/afr
subvolumes nyc sjc
end-volume
><>
Nathan Stratton
nathan at robotics.net
http://www.robotics.net
On Thu, 28 Feb 2008, Anand Avati wrote:
> on the client. you also might want to put this write-behind + io-cache pair
> in the subvolume path of afr which leads towards the remote site alone. Also
> make sure afr does not have the remote site as the first subvolume, and has
> the option read-subvolume <local-volume> so that reads are not scheduled to
> the remote site.
>
> avati
>
> 2008/2/28, nathan@xxxxxxxxxxxx <nathan@xxxxxxxxxxxx>:
>>
>>
>> On Thu, 28 Feb 2008, Anand Avati wrote:
>>
>>> using a combination of write-behind with io-threads (with option
>>> flush-behind on) prevents the wait of upto N-MB of data (where N is
>> 'option
>>> cache-size NMB' of io-threads)
>>
>>
>> Client and server are on each host, should I do this on the client or
>> server?
>>
>> -Nathan
>>
>
>
>
> --
> If I traveled to the end of the rainbow
> As Dame Fortune did intend,
> Murphy would be there to tell me
> The pot's at the other end.
>
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