monitoring multipath IO for read and write operation

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Read and write in the file

Hello Guys, How all are doing? I have an issue in Unix and want help from all of you I have a file in UNIX which it read by line by line , If at the end of line '0' is written the it should fetch that line into another file and change '0' to '1' and If at the end of line '1' is written then it...

2. Shell Programming and Scripting

Grab data between 2 keywords any do an array operation and write the file intact

Hi Unix Gurus, I need to grep for a block that is between a start and end keyword and then in between I need to find and replace a keyword. for eg: I need to search between Test = 000; and Test = 000; and find K9 and replace with M9 INPUT FILE Define { Replace = K9; Test =...

3. Shell Programming and Scripting

Transferring file write operation to another host

I have a process running on two hosts in Active/Standby mode. Process running on active machine is handling the traffic while process running on Standby machine is sitting idle. We have a debugging mechanism in which logs are generated on local machine. When logging is enabled then process running...

4. AIX

Monitoring AIX with System Center Operation Manager 2007 R2

I can get my AIX servers to show up in SCOM but I'm struggling with running personal scripts and have the result of these scripts show up in SCOM. I'm currently using BigBrother and I've written some scripts for BB. I would like to convert these scripts to something that can be used in SCOM. ...

5. Shell Programming and Scripting

Column operation : cosne and sine operation

I have a txt file with several columns and i want to peform an operation on two columns and output it to a new txt file . file.txt 900.00000 1 1 1 500.00000 500.00000 100000.000 4 4 1.45257346E-07 899.10834 ...

6. Linux

File read/ write operation

Hi, I am creating a progress bar for file upload for which I have CGI script which copies the data and depending on certain bytes it increments the progress bar. Here, I am writing the incremented value to a file which is read by Ajax at server end. However, here I want to ask that, is it...

7. IP Networking

read/write,write/write lock with smbclient fails

Hi, We have smb client running on two of the linux boxes and smb server on another linux system. During a backup operation which uses smb, read of a file was allowed while write to the same file was going on.Also simultaneous writes to the same file were allowed.Following are the settings in the...

8. Shell Programming and Scripting

Find all files with group read OR group write OR user write permission

I need to find all the files that have group Read or Write permission or files that have user write permission. This is what I have so far: find . -exec ls -l {} \; | awk '/-...rw..w./ {print $1 " " $3 " " $4 " " $9}' It shows me all files where group read = true, group write = true...

9. UNIX for Dummies Questions & Answers

Simultaneous file read operation

Hi All, I need information on file handling in UNIX enviornment. If in UNIX enviornment I have two process.. P1 P2 Both accessing the same file simultaneosuly(read operation).. Suppose P1 opened the file in read mode first and started reading the file.. Then P2 opens the same file in...

10. IP Networking

how do you get to know if the write operation was succesful.

how do you get to know if the write operation for writing to a socket was succesful was succesful.

LEARN ABOUT CENTOS

mpathconf

MPATHCONF(8)						   Linux Administrator's Manual 					      MPATHCONF(8)

NAME

       mpathconf - A tool for configuring device-mapper-multipath

SYNOPSIS

       mpathconf [commands] [options]

DESCRIPTION

       mpathconf  is  a  utility  that	creates  or modifies /etc/multipath.conf.  It can enable or disable multipathing and configure some common
       options.  mpathconf can also load the dm_multipath module, start and stop the multipathd daemon, and configure the  multipathd  service	to
       start automatically or not. If mpathconf is called with no commands, it will display the current configuration.

       The  default  options  for mpathconf are --with_module The --with_multipathd option is not set by default.  Enabling multipathing will load
       the dm_multipath module but it will not immediately start it. This is so that users can manually  edit  their  config  file  if	necessary,
       before starting multipathd.

       If /etc/multipath.conf already exists, mpathconf will edit it. If it does not exist, mpathconf will use /usr/share/doc/device-mapper-multi-
       path-0.4.9/multipath.conf as the starting file. This file has user_friendly_names set. If this file does not exist, mpathconf  will  create
       /etc/multipath.conf  from  scratch.   For  most	users,	this  means  that  user_friendly_names will be set by default, unless they use the
       --user_friendly_names n command.

COMMANDS

       --enable
	      Removes any line that blacklists all device nodes from the /etc/multipath.conf blacklist section.

       --disable
	      Adds a line that blacklists all device nodes to the /etc/multipath.conf blacklist section. If no blacklist section exists,  it  will
	      create one.

       --user_friendly_name  { y | n }
	      If  set  to y, this adds the line user_friendly_names yes to the /etc/multipath.conf defaults section. If set to n, this removes the
	      line, if present. This command can be used along with any other command.

       --find_multipaths { y | n }
	      If set to y, this adds the line find_multipaths yes to the /etc/multipath.conf defaults section. If set to n, this removes the line,
	      if present. This command can be used aldong with any other command.

OPTIONS

       --with_module { y | n }
	      If  set  to  y,  this runs modprobe dm_multipath to install the multipath modules. This option only works with the --enable command.
	      This option is set to y by default.

       --with_multipathd { y | n }
	      If set to y, this runs service multipathd start to start the multipathd daemon on --enable, service multipathd stop to stop the mul-
	      tipathd  daemon on --disable, and service multipathd reload to reconfigure multipathd on --user_frindly_names and --find_multipaths.
	      This option is set to n by default.

FILES

       /etc/multipath.conf

SEE ALSO

       multipath.conf(5), modprobe(8), multipath(8), multipathd(8), service(8),

AUTHOR

       Benjamin Marzinski <bmarzins@redhat.com>

								     June 2010							      MPATHCONF(8)

Solaris