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will more RAM = increase write performance

M

mjz_5

2[H]4U
Joined
May 24, 2001
Messages
3,637
Hi:

I have a p3 866 (w/ 256 RAM) as a file server with a Gigabit NIC. When i upload from my main rig (A64 3000+ w/ GIG RAM) to the server I get roughly 11 MB/s transfer; however, when downloading, i get ~18 MB/s.

Is this because my main rig has more RAM and is able to write faster? It can't be my server CPU because looking at task manager, it never goes above ~66%.

Thanks in advance
 
More memory will allow the OS to use a larger chunk of it as filesystem cache, but frankly, your performance is so low that this isn't a bottleneck. I'd suspect either your disks are old/slow, you're doing some sort of software RAID5 with that sky-high processor usage, your disks are stuck in PIO mode, or SMB/NFS whatever transport system you're using is terribly misconfigured.

It's actually fairly normal to see higher download (server->client) rates than upload (client->server) with SMB, as the protcol isn't too hot. You want to download when possible, and sometimes I even find myself logging into my fileserver and hooking into the client to suck down the file for huge transfers (i.e. role reversal). However, that's not the majority of your problem. Can't say much else without knowing more.
 
The server is a PIII 866 - Asus CUSL2C - Crucial 256 SDRAM - and the tests was done on a 200 GB WD 8MB Hard drive (different channel from system disk). I am using windows 2000 server with SP4. Updated all my chipset drivers.

:(
 
1) Benchmark the drive with one of the tools listed in the DS FAQ and see how it performs.
2) Benchmark your network with bricks or another network test utility to see how it performs (there are a lot of cheesy GigE products around and commonly overlooked things like interference on the wires).
3) Check and see if the nic and disk controller are sharing/fighting for resources with other system devices
 
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