if your mount options *(tcp/udp-rsize/wsize-nfs/cifs and vers and the other opt) and nic settings are same on the both of them server
then we may check the rx/tx (eg.number of packets which hold by driver) buffer queue sizes.because of there is seem drops in the rx buffer.
if any operations needs high traffic we can increase the driver buffers.
we are facing the slow read operations so you likely pointed the correct value.
check the your (vm) nic card driver and search for , is there a bug or update or patches and then apply it.
Code:
# ethtool -i eth0
check the current ring buffer settings.
Code:
# ethtool -g eth0
and try to increase the rx value to defined maximum values.(eg..256/512/1024)
Code:
# ethtool -G eth0 rx 512
and test again and check the drops count.
if there is no change after dd tests then you can try to change the virtual nic to avaliable other one in the oracle vm net settings.
Hallo,
i need a Prompting read in my script:
read -p "Enter your command: " command
But i always get this Error:
-p: is not an identifier
When I run these in c-shell i get this error
/usr/bin/read: read: bad option(s)
How can I use a Prompt in the read command? (9 Replies)
Hi,
Currently I have a Samba shared configured as follows:
comment = Public fileshare
path = /u02/pub
guest ok = Yes
writeable = Yes
There is a subfolder under /u02/pub called /u02/pub/expenses/hardware that I need to make read only. How do I do this? I am new to using Samba.
... (2 Replies)
I analysed disk performance with blktrace and get some data:
read:
8,3 4 2141 2.882115217 3342 Q R 195732187 + 32
8,3 4 2142 2.882116411 3342 G R 195732187 + 32
8,3 4 2144 2.882117647 3342 I R 195732187 + 32
8,3 4 2145 ... (1 Reply)
Being a novice user to linux i m little unaware of how would i check disk read write speed.
One of my mate is suggesting to create a file using dd command and check how much time it takes to create a 30 gb file .
I think this has a little sense however i would also like to take your reviews... (5 Replies)
I'm hoping someone here can help me. I'm computer literate but by no means an expert! I'm simply trying to recover data from my DLink DNS343 NAS mounted on my X86 iMac using SMB. Somehow, in moving to a new computer, I have lost access to some files on the NAS. Just some files are access denied.
... (0 Replies)
there are few nas shares that would be mounted on the local zone. should i add an entry into the add an entry in zone.xml file so that it gets mounted automatically when the zone gets rebooted? or whats the correct way to get it mounted automatically when the zone reboots (2 Replies)
I have an AIX box that mounts a Windows share across subnets. When I try to copy a 100 MB file to it, it copies around 2 MB/s. If I copy to another Windows share on the same subnet it copies around 12 MB/s. All I have is gigabit networks so I would expect it to go well over 12 MB/s, which is the... (8 Replies)
Heyas
At home i have 1 nas with 3 shares, of which i used to mount 2 of them using a script with hardcoded password and username in it.
EDIT: Turns out, its not the script, but 'how i access' the nas share.. (-o user=XY,password=... VS. -o credentials=...).
Figured about credential files,... (0 Replies)
Hello All,
I am building a real time parser for a log file in my application.
The log file is continuously written at a very fast pace and gets rolled over every 10 minutes.
I have measured the speed and observed that around 1000 lines are written to it every second, each line about 30-40... (7 Replies)
Discussion started by: cool.aquarian
7 Replies
LEARN ABOUT REDHAT
ethtool
ETHTOOL(8) System Manager's Manual ETHTOOL(8)NAME
ethtool - Display or change ethernet card settings
SYNOPSIS
ethtool ethX
ethtool -h
ethtool -a ethX
ethtool -A ethX [autoneg on|off] [rx on|off] [tx on|off]
ethtool -c ethX
ethtool -C ethX [adaptive-rx on|off] [adaptive-tx on|off] [rx-usecs N] [rx-frames N] [rx-usecs-irq N] [rx-frames-irq N] [tx-usecs N] [tx-
frames N] [tx-usecs-irq N] [tx-frames-irq N] [stats-block-usecs N] [pkt-rate-low N] [rx-usecs-low N] [rx-frames-low N] [tx-usecs-low N]
[tx-frames-low N] [pkt-rate-high N] [rx-usecs-high N] [rx-frames-high N] [tx-usecs-high N] [tx-frames-high N] [sample-interval N]
ethtool -g ethX
ethtool -G ethX [rx N] [rx-mini N] [rx-jumbo N] [tx N]
ethtool -i ethX
ethtool -d ethX
ethtool -e ethX
ethtool -k ethX
ethtool -K ethX [rx on|off] [tx on|off] [sg on|off]
ethtool -p ethX [N]
ethtool -r ethX
ethtool -S ethX
ethtool -t ethX [offline|online]
ethtool -s ethX [speed 10|100|1000] [duplex half|full] [port tp|aui|bnc|mii] [autoneg on|off] [phyad N] [xcvr internal|external]
[wol p|u|m|b|a|g|s|d...] [sopass xx:yy:zz:aa:bb:cc] [msglvl N]
DESCRIPTION
ethtool is used for querying settings of an ethernet device and changing them.
ethX is the name of the ethernet device to work on.
OPTIONS
ethtool with a single argument specifying the device name prints current setting of the specified device.
-h shows a short help message.
-a queries the specified ethernet device for pause parameter information.
-A change the pause parameters of the specified ethernet device.
autoneg on|off
Specify if pause autonegotiation is enabled.
rx on|off
Specify if RX pause is enabled.
tx on|off
Specify if TX pause is enabled.
-c queries the specified ethernet device for coalescing information.
-C change the coalescing settings of the specified ethernet device.
-g queries the specified ethernet device for rx/tx ring parameter information.
-G change the rx/tx ring parameters of the specified ethernet device.
rx N Change number of ring entries for the Rx ring.
rx-mini N
Change number of ring entries for the Rx Mini ring.
rx-jumbo N
Change number of ring entries for the Rx Jumbo ring.
tx N Change number of ring entries for the Tx ring.
-i queries the specified ethernet device for associated driver information.
-d retrieves and prints a register dump for the specified ethernet device.
-e retrieves and prints an EEPROM dump for the specified ethernet device.
-k queries the specified ethernet device for checksumming information.
-K change the checksumming parameters of the specified ethernet device.
rx on|off
Specify if RX checksumming is enabled.
tx on|off
Specify if TX checksumming is enabled.
sg on|off
Specify if scatter-gather is enabled.
-p initiates adapter-specific action intended to enable an operator to easily identify the adapter by sight. typically this involves
blinking one or more LEDs on the specific ethernet port.
N Length of time to perform phys-id, in seconds.
-r restarts auto-negotiation on the specified ethernet device, if auto-negotiation is enabled.
-S queries the specified ethernet device for NIC- and driver-specific statistics.
-t executes adapter selftest on the specified ethernet device. Possible test modes are:
offline|online
defines test type: offline (default) means to perform full set of tests possibly causing normal operation interruption during the
tests, online means to perform limited set of tests do not interrupting normal adapter operation.
-s option allows changing some or all settings of the specified ethernet device. All following options only apply if -s was specified.
speed 10|100|1000
Set speed in Mb/s. ethtool with single argument will show you the supported device speeds.
duplex half|full
Set full or half duplex mode.
port tp|aui|bnc|mii
Select device port.
autoneg on|off
Specify if autonegotiation is enabled. In the usual case it is, but might cause some problems with some network devices, so you can
turn it off.
phyad N
PHY address.
xcvr internal|external
Select transceiver type. Currently only internal and external can be specified, in the future further types might be added.
wol p|u|m|b|a|g|s|d...
Set Wake-on-LAN options. Not all devices support this. The argument to this option is a string of characters specifying which
options to enable.
p Wake on phy activity
u Wake on unicast messages
m Wake on multicast messages
b Wake on broadcast messages
a Wake on ARP
g Wake on MagicPacket(tm)
s Enable SecureOn(tm) password for MagicPacket(tm)
d Disable (wake on nothing). This option clears all previous options.
sopass xx:yy:zz:aa:bb:cc
Set the SecureOn(tm) password. The argument to this option must be 6 bytes in ethernet MAC hex format (xx:yy:zz:aa:bb:cc).
msglvl N
Set the driver message level. Meanings differ per driver.
BUGS
Not supported (in part or whole) on all ethernet drivers.
AUTHOR
ethtool was written by David Miller.
Modifications by Jeff Garzik, Tim Hockin, Jakub Jelinek, Andre Majorel, Eli Kupermann.
AVAILABILITY
ethtool is available over the Web on the SourceForge site at http://sourceforge.net/projects/gkernel/
Ethtool version 1.6 June 2002 ETHTOOL(8)
11-04-2014
