Francisco Tapia
fhtapia at gmail.com
Fri May 18 18:26:35 CDT 2007
you sure love your comodo :) On 5/18/07, jwcolby <jwcolby at colbyconsulting.com> wrote: > > I just thought you might be interested in some numbers, transferring a > large > file from system to system on a network. > > Two identical computers, 3.8g X2 AMD proc systems, running Windows 2003. > Both systems run Comodo personal firewall (software firewall) with > specific > rules allowing transfers from/to any other computer within my internal > network. Both systems use an Areca 1220 dedicated RAID controller, and > both > systems use Seagate 7200.10 drives in the arrays. The "From" system has a > Raid6 Array, the "To" system has a Raid 5 array. There is a gigabit > switch > between the systems. > > I am transferring a 120 gbyte SQL Server database file (dbf). When the > transfer started it "settled down" after a couple of seconds saying it > would > take 48 minutes to transfer the file, which indicates about 2.5 gigabytes > / > minute, 42 mb / second. Testing has shown the read speed to be about 450 > mbyte / sec for these arrays, so that is most likely the write speed of > the > Raid5 destination array. Write speed for these arrays is just slightly > worse than the write speed of any single disk. > > Using task manager to simply view the network usage, the network seems to > be > using about 40% capacity on average. > > Again, using task manager, the CPU usage for the two cores shows core one > swinging between 0 and 40%with a rough average around 20%. Core two is > swinging between 60% and 80%. When the work is steady (and there are > places > where both cores, but particularly core 2 varies wildly), the "average" is > reported as around 40%, as displayed in the CPU Usage. All of this usage > being on the transmitting system. The task reporting most usage time is > system idle, then explorer. > > System two (the receiving system) shows almost no Core 1 usage and Core 2 > swinging wildly, but again averaging around 40% or so usage, both cores > combined, per the CPU Usage display. > > John W. Colby > Colby Consulting > www.ColbyConsulting.com > > _______________________________________________ > dba-VB mailing list > dba-VB at databaseadvisors.com > http://databaseadvisors.com/mailman/listinfo/dba-vb > http://www.databaseadvisors.com > > -- -Francisco http://sqlthis.blogspot.com | Tsql and More...