now my issue is that when i transfer large files to it the network performance contantly spikes at about 40% of the GB connection and then plummets to 0% and keeps doing that contantly ( goes up then down every 4 seconds or so ) - This is from a windows box and ive tried multiple boxes
Doesn't looks like a problem to me as long as the disks are ~100% busy, which you you don't tell. Gigabit Ethernet is simply not the bottleneck here.
What says:
during a transfer ?
Hello,
I used the search engine but could not find the solution I am looking for. Probably its simple but I do not know the solution.
My requirement is I ftp files every day in the morning from the remote server to the local machine. Now if the files are not there at the time I schedule the ftp... (2 Replies)
Was wonder if there was a tool or program I could run to measure throughput on our CentoS 4.x server. Our current dedicated host provider is charging us by how much throughput we are using and I just want to see if their numbers add up to whatever I get using a throughput tool of some kind.
... (6 Replies)
As a rule of thumb in doing calculations, what figure would you use in Mbytes/sec? I know the answer varies grealty on the topolgy of the network but I wonde what newteok engineers use a rough rule of thumb?
Many thanks. (1 Reply)
I have a 10Gbps network link connecting two machines A and B. I want to transfer 20GB data from A to B using TCP. With default setting, I can use 50% bandwidth. How to improve the throughput? Is there any way to make throughput as close to 10Gbps as possible? thanks~ :) (3 Replies)
We have a DB server which is constantly utilised above 95% above.
This is becoming nuisance when the monitoring team frequently calls to check on it. Frankly I do not know what to tweak or even interpret the outputs.
I noticed constant 30 to 60% in wio column of the cpu utilisation.
There... (1 Reply)
Hello gurus,
I have the following configuration in the server side:
# dladm show-aggr
key: 33 (0x0021) policy: L4 address: 0:14:4f:6c:11:8 (auto)
device address speed duplex link state
nxge0 0:14:4f:6c:11:8 1000 Mbps ... (3 Replies)
Hello,
First time poster here hoping to get some help with ns2.
I've recently started using ns2(first time user) but I'm having difficulty getting the results I'm after.
I am trying to set up a network with wireless nodes(5-15 nodes) and then use xgraph to display a timing diagram,... (0 Replies)
Hey Guys,
Does anybody know, which OID's of Net-SNMP is used to collect throughput and bandwith usage of machine??
I got these OID's
..iso.org.dod.internet.mgmt.mib-2.interfaces.ifTable.ifEntry.ifOutOctets
..1.3.6.1.2.1.2.2.1.16
... (1 Reply)
Discussion started by: franzramadhan
1 Replies
LEARN ABOUT NETBSD
iostat
IOSTAT(8) BSD System Manager's Manual IOSTAT(8)NAME
iostat -- report I/O statistics
SYNOPSIS
iostat [-CdDITx] [-c count] [-M core] [-N system] [-w wait] [drives]
DESCRIPTION
iostat displays kernel I/O statistics on terminal, disk and CPU operations. By default, iostat displays one line of statistics averaged over
the machine's run time. The use of -c presents successive lines averaged over the wait period. The -I option causes iostat to print raw,
unaveraged values.
Only the last disk option specified (-d, -D, or -x) is used.
The options are as follows:
-c count Repeat the display count times. Unless the -I flag is in effect, the first display is for the time since a reboot and each sub-
sequent report is for the time period since the last display. If no wait interval is specified, the default is 1 second.
-C Show CPU statistics. This is enabled by default unless the -d, -D, -T, or -x flags are used.
-d Show disk statistics. This is the default. Displays kilobytes per transfer, number of transfers, and megabytes transferred.
Use of this flag disables display of CPU and tty statistics.
-D Show alternative disk statistics. Displays kilobytes transferred, number of transfers, and time spent in transfers. Use of this
flag disables the default display.
-I Show the running total values, rather than an average.
-M core Extract values associated with the name list from the specified core instead of the default ``/dev/mem''.
-N system Extract the name list from the specified system instead of the default ``/netbsd''.
-T Show tty statistics. This is enabled by default unless the -C, -d, or -D flags are used.
-w wait Pause wait seconds between each display. If no repeat count is specified, the default is infinity.
-x Show extended disk statistics. Each disk is displayed on a line of its own with all available statistics. This option overrides
all other display options, and all disks are displayed unless specific disks are provided as arguments. Additionally, separate
read and write statistics are displayed.
iostat displays its information in the following format:
tty
tin characters read from terminals
tout characters written to terminals
disks
Disk operations. The header of the field is the disk name and unit number. If more than four disk drives are configured in the sys-
tem, iostat displays only the first four drives. To force iostat to display specific drives, their names may be supplied on the com-
mand line.
KB/t Kilobytes transferred per disk transfer
t/s transfers per second
MB/s Megabytes transferred per second
The alternative display format, (selected with -D), presents the following values.
KB Kilobytes transferred
xfr Disk transfers
time Seconds spent in disk activity
cpu
us % of CPU time in user mode
ni % of CPU time in user mode running niced processes
sy % of CPU time in system mode
id % of CPU time in idle mode
FILES
/netbsd Default kernel namelist.
/dev/mem Default memory file.
SEE ALSO fstat(1), netstat(1), nfsstat(1), ps(1), systat(1), vmstat(1), pstat(8)
The sections starting with ``Interpreting system activity'' in Installing and Operating 4.3BSD.
HISTORY
iostat appeared in Version 6 AT&T UNIX. The -x option was added in NetBSD 1.4.
BSD March 1, 2003 BSD