Ross S. W. Walker wrote:
-----Original Message-----
From: centos-bounces@xxxxxxxxxx
[mailto:centos-bounces@xxxxxxxxxx] On Behalf Of Karl R. Balsmeier
Sent: Tuesday, May 22, 2007 2:28 PM
To: centos@xxxxxxxxxx
Subject: Vsftpd & Iscsi - fast enough
To extend space on our 64-bit centos FTP servers, we are considering
setting them up to work with an existing PromiseRAID system via iscsi.
-just curious if anyone here knows if iScsi is fast enough to
serve up
all the images?
-might it be something where we get dedicated cards and put the iScsi
traffic on its own Vlan?
Just curious if this would hold up under alot of traffic,
like weather
images and the like...
The ability of iSCSI to support high throughput depends on:
1) How the back-end storage being served up by iSCSI is configured
2) How the network interconnects between the iSCSI targets and
initiators are configured
3) How well the FTP software does at reading the data from disk and
pumping it out the network
1Gbps ethernet can handle up to 115MB/s per interface. Using MPIO
round-robin over several interfaces you can continue to add throughput
if the application can scale well across these multiple paths.
-Ross
hey this part is fascinating, -so how would one practically deploy this,
-say 4 GB NICs and some supported hardware? for traffic 100 - 200 megs
daily perhaps this is too much? On the storage side, not sure if MPIO
will auto-detect the device, but maybe it'll see it. -wonder if Vsftpd
would play well with all of this.
-krb
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