[OpenAFS] [Q] Funny Traffic ...

[Dexter "Kim" Kimball]

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