[OpenAFS] [Q] Funny Traffic ...

[Sungjin Chun]

Thanks for your help, here comes another question :-)

How can I know that the "hesitation" occurs using afsmonitor, what value
should I consult? And current chunksize is 256K, if bugger one shows better
performance, what is the limit ofr chunksize?

Thanks in advance.

On Tue, Mar 25, 2003 at 08:31:44AM -0700, Dexter Kim Kimball wrote:
> Use afsmonitor to look at your cache behavior.
> 
> You may find that the "hesitations" occur when the cache is purging.
> 
> If so, reduce cache size and repeat benchmarking until the hesitations go
> away.
> 
> With the large files you describe, I'd also look at changing the default
> chunksize (look at arguments to "afsd") from 64K to something much larger.
> 
> Kim
> ---------------------------------------------------
> Dexter "Kim" Kimball
> CCRE, Inc.
> dhk@ccre.com
> 
> 
> ----- Original Message -----
> From: "S.J.Chun" <chunsj@embian.com>
> To: <openafs-info@openafs.org>
> Sent: Tuesday, March 25, 2003 8:18 AM
> Subject: [OpenAFS] [Q] Funny Traffic ...
> 
> 
> > Hi,
> >
> > We are using one OpenAFS server and one OpenAFS client, through the client
> we are serving files(
> > rather big sized files, normally 600~800MB) using apache http server. Now,
> we have BIG performance
> > problem. We've chosen AFS for its high scalability but the performance is
> very bad. We are using
> > 100M dedicated line and expected the download speed as up to 800K or
> 1,000K through our cable
> > or ADSL line, but only got 40 ~ 80K. What is the best configuration for
> our purpose?
> >
> > And if I try to get file using ftp, the data transfer is rather funny; it
> gets 256K of data, then waits some
> > times(several seconds) then again gets another 256K of data. Why the data
> transfer is not continuous?
> > Misconfiguration?
> >
> > The server has 2 TB of storage and the client has 9GB of cache. And OS is
> Linux.
> >
> > Thanks in advance.
> > _______________________________________________
> > OpenAFS-info mailing list
> > OpenAFS-info@openafs.org
> > https://lists.openafs.org/mailman/listinfo/openafs-info
> 
> ----- Original Message -----
> From: "S.J.Chun" <chunsj@embian.com>
> To: <openafs-info@openafs.org>
> Sent: Tuesday, March 25, 2003 8:18 AM
> Subject: [OpenAFS] [Q] Funny Traffic ...
> 
> 
> > Hi,
> >
> > We are using one OpenAFS server and one OpenAFS client, through the client
> we are serving files(
> > rather big sized files, normally 600~800MB) using apache http server. Now,
> we have BIG performance
> > problem. We've chosen AFS for its high scalability but the performance is
> very bad. We are using
> > 100M dedicated line and expected the download speed as up to 800K or
> 1,000K through our cable
> > or ADSL line, but only got 40 ~ 80K. What is the best configuration for
> our purpose?
> >
> > And if I try to get file using ftp, the data transfer is rather funny; it
> gets 256K of data, then waits some
> > times(several seconds) then again gets another 256K of data. Why the data
> transfer is not continuous?
> > Misconfiguration?
> >
> > The server has 2 TB of storage and the client has 9GB of cache. And OS is
> Linux.
> >
> > Thanks in advance.
> > _______________________________________________
> > OpenAFS-info mailing list
> > OpenAFS-info@openafs.org
> > https://lists.openafs.org/mailman/listinfo/openafs-info
>