[Gluster-users] Bug of write-behind client side

[Raghavendra G]

Hi,

what patch are you using? with glusterfs--mainline--3.0--patch-329 and a
basics setup of write-behind over protocol/client, glusterfs cpu usage never
went above 65% in my tests. Can you please confirm whether the problem
persists in patch-329?

regards,

On Thu, Aug 28, 2008 at 6:27 AM, Dai, Manhong <daimh at umich.edu> wrote:

>  Hi,
>
> client.vol is
>
> volume unify-brick
>   type cluster/unify
>   option scheduler rr # round robin
>   option namespace muskie-ns
> #  subvolumes muskie-brick pike1-brick pike2-brick pike3-brick
>   subvolumes muskie-brick pike1-brick pike3-brick
> end-volume
>
> volume wb
>   type performance/write-behind
>   option aggregate-size 1MB
>   option flush-behind on
>   subvolume
> client.vol is
>
> volume unify-brick
>   type cluster/unify
>   option scheduler rr # round robin
>   option namespace muskie-ns
> #  subvolumes muskie-brick pike1-brick pike2-brick pike3-brick
>   subvolumes muskie-brick pike1-brick pike3-brick
> end-volume
>
> volume wb
>   type performance/write-behind
>   option aggregate-size 1MB
>   option flush-behind on
>   subvolumes unify-brick
> end-volume
>
>
> yes abcdefghijklmn | while read l; do echo $l; done > a
>
> would cause glusterfs process 100% busy and files system hang when the
> output size is around the aggregate-size.
>
>
> removing write-behind translator would get rid of this problem.
>
>
> s unify-brick
> end-volume
>
>
> command "yes abcdefghijklmn | while read l; do echo $l; done > a" would
> cause glusterfs process 100% busy and files system hang when the output size
> is around the aggregate-size. removing write-behind translator would get rid
> of this problem.
>
>
>
>
> Best,
> Manhong
>
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>
>


-- 
Raghavendra G

A centipede was happy quite, until a toad in fun,
Said, "Prey, which leg comes after which?",
This raised his doubts to such a pitch,
He fell flat into the ditch,
Not knowing how to run.
-Anonymous
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