Guys,Issue :Netbackup server sends alert NDMP communication failure once everyday. But there is no issue to run scheduled backup jobs.Environment : Netbackup server is RHEL 6.2 which also works as Media server, Netbackup 7.1 is running on it. NDMP host is Netapp filer 2240. Backup is being taken on HP MSL 4049 tape.Troubleshooting steps followed :Everyday I receive a NDMP communication error alert messages once. I don't know why. I tried to troubleshoot but no luck. Even Symantec doesn't have any answer apart from what they have in their...
Sunday, 12 May 2013
Sunday, 28 April 2013
CISCO UCS makes easy to manage IT setup and provides optimized usage of resources
Posted on 12:47 by Unknown
CISCO has launched UCS (unified computing system) few years back and this makes really easy to manage IT environment. CISCO UCS 5k chassis (containing 8 blades), fabric interconnect(6k) and fabric extender (2k) ie FEX make UCS environment where FCOE protocol is used. In a tipical setup, two FEX will be connected to one chassis. Each FEX has 8 Ethernet and 2 FC ports. Two downlink connection will be for single blade, each from FEX. You don't need to manually do cabling. You need to insert FEX module. That's it. This is also called IO...
Wednesday, 10 April 2013
multipath details on RHEL 6
Posted on 12:58 by Unknown
Guys,I'll mention one default configuration file(/etc/multipath.conf)Environment : RHEL 6 : Default : /etc/multipath.conf [comment should be removed]-------------#multipath.conf#NetApp recommended settingsdefaults{ user_friendly_names yes max_fds max queue_without_daemon no bindings_file "/var/lib/multipath/bindings" uid=500 ...
How to verify UDP packet communication between two linux system?
Posted on 12:13 by Unknown
Guys,Today, I had to check UDP packet communication between linux and a windows system. Main purpose of the windows system was to capturing or receiving syslog data from various linux system on arcsight. Hence, remote log forwarding was enabled on client. Following steps I followed :Sending UDP packets from client :$nc -uv IP_of_system_where_UDP_is_sending port_number_to_which_UDP_is_receivingHelloThis is test UDP packetAre you capturing itPlease let me knowExample :A$ nc 192.1.2.10 514HelloThis...
Tuesday, 26 February 2013
New posts are coming soon..
Posted on 10:45 by Unknown
Hi Guys,It's been a long time I didn't post any article or issue here. There were few transitions in my career and I was bit busy. Hence, I didn't get time to update or post. There are more technologies on which I'll discuss. Following are in pipeline :Linux KernelA bit about Red Hat Company and ProductLinux troubleshooting step and basic conceptCISCO unified computing system( UCS )CISCO Fabric Interconnect Switch, VLAN, port channeling etcFCOE, FC protocolRed Hat ClusterVeritas ClusterVeritas Volume ManagerDMP or Veritas Dynamic MultipathingSAN/NASVmware...
Tuesday, 17 July 2012
Steps to develop patch and apply it to original source file
Posted on 02:04 by Unknown
1. Create test.c Above file contains :--------[kamalma@test-1 C_Programming]$ cat test.c#include#includeint main() { printf("\n I'm kamal \n");return 0;}--------2. Compile it and check its output.OP :-------[kamalma@test-1 C_Programming]$ ./test I'm kamal[kamalma@test-1 C_Programming]$-------3. Modify test.c and add new lines or codes in it. Lets say it test_modifed.c. This file contains following codes :------[kamalma@test-1 C_Programming]$ cat test_modified.c#include#includeint main() { printf("\n I'm kamal \n"); printf("\nI...
Sunday, 3 June 2012
How to redirect tomcat log to syslog server?
Posted on 21:49 by Unknown
I assume that you are going to use log4j tool to log the tomcat messages. In order to redirect these messages in syslog file, you should modify4j$CATALINA_BASE/lib/log4j.properties and make sure following entries are present : -------------------log4j.rootLogger=INFO, CATALINA# Define all the appenderslog4j.appender.CATALINA=org.apache.log4j.DailyRollingFileAppenderlog4j.appender.CATALINA.File=${catalina.base}/logs/catalina.log4j.appender.CATALINA.Append=truelog4j.appender.CATALINA.Encoding=UTF-8# Roll-over the log once per daylog4j.appender.CATALINA.DatePattern='.'yyyy-MM-dd'.log'log4j.appender.CATALINA.layout...
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