Re: Smaller fs=x is better?!?

Joerg Schilling wrote:
> "Zoran Ljubisic" <[email protected]> wrote:
>
>> Hi,
>>
>> On SuSE 9.3 prof, I get better transfer rates if I am using default
>> fs=8m instead of say fs=128m.
>> Weird?!?
>
> How much RAM does your PC have?
>
> Reading TFM telly ou, that you should not use more than half of the
> physical RAM.

My PC has 1GB RAM.

I run several test with script that changes fs to 8m 16m 24m 32m 64m 128m or 
256m.
My results follows:

On dir that has 500 MB size:

server-Backup OK! 05.11.2005-17:06:28, Minuta=4.65, FS=8m

server-Backup OK! 05.11.2005-17:11:46, Minuta=4.36, FS=16m

server-Backup OK! 05.11.2005-17:16:47, Minuta=4.36, FS=24m

server-Backup OK! 05.11.2005-17:21:48, Minuta=4.36, FS=32m

server-Backup OK! 05.11.2005-17:26:49, Minuta=4.51, FS=64m

server-Backup OK! 05.11.2005-17:32:00, Minuta=4.38, FS=128m

server-Backup OK! 05.11.2005-17:37:02, Minuta=4.58, FS=256m


On dir that has 1,8 GB size:

server-Backup OK! 05.11.2005-17:42:16, Minuta=12.43, FS=8m

server-Backup OK! 05.11.2005-17:55:24, Minuta=12.33, FS=16m

server-Backup OK! 05.11.2005-18:08:27, Minuta=12.13, FS=24m

server-Backup OK! 05.11.2005-18:21:18, Minuta=12.40, FS=32m

server-Backup OK! 05.11.2005-18:34:25, Minuta=12.30, FS=64m

server-Backup OK! 05.11.2005-18:47:25, Minuta=12.40, FS=128m

server-Backup OK! 05.11.2005-19:00:31, Minuta=12.33, FS=256m



Minuta is seconds/60 so Minuta=1,5 = 90 seconds.
On my dat that has 3 MB/s native and 6 MB/s with compression throughput, 
256/6 ~ 42 seconds.
So 1/4 of physical RAM should be plenty.

Zoran