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How to increase "SHARED MEMORY"

Posted 09-17-2013 at 03:17 AM by pantdk

=> INCREASE SHARED MEMORY

1) Check the requirement of the user - say it is 75 % of RAM

2) Check RAM (free -m)

3) Calculate new shared memory size, 75 % in our example - say it is 105 G

4) Follow below steps

# sudo cp -p /etc/fstab /etc/fstab_`date +%d-%m-%Y`

# sudo vim /etc/fstab

tmpfs /dev/shm tmpfs defaults,size=107520m 0 0

#...
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Old

Multipath disk identify

Posted 09-16-2013 at 02:57 AM by pantdk
Updated 01-01-2014 at 01:14 PM by pantdk

To find the fiber port & model name in the server.
$sudo /sbin/lspci |grep -i "Fibre"

$ sudo /usr/bin/systool -c scsi_host -v "
$ sudo /usr/bin/systool -c fc_host -v "port name node name"

WWN & WWPN
We have Two HBA here example (host0 and host1).

To get the WWNN (World Wide Node Number) in Linux:

dpant# cat /sys/class/fc_host/host0/node_name
0x20000000c9538d93
dpant#...
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Old

Syslog server in rhel5

Posted 12-02-2011 at 03:48 AM by pantdk

#################################################################################################
syslog server 192.168.0.120
##################################################################################################
[root@deepak ~]# mkdir /var/client/

[root@deepak ~]# vi /etc/syslog.conf

192.168.0.20
*.* /var/client/192.168.0.20.log

192.168.0.20
*.* /var/client/192.168.0.20.ker.log

[root@deepak...
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