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How to start SNMPD in debug mode |
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Written by geekyS
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Saturday, 26 February 2011 04:46 |
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Below instructions shows how to start snmpd daemon in debug mode ,
[root@geekyS ~ ]# /etc/init.d/snmpd stop
[root@geekyS ~ ]# /usr/sbin/snmpd -Lf /tmp/snmp.log -p /var/run/snmpd.pid -a -d -V
-Lf - Log the debug output to file /tmp/snmp.log
-a - Log the source address of incoming requests
-d - Dump the sent and received SNMP packets in hexadecimal
-V - Dumps SNMP transactions
Refer SNMPD / SNMPD CMD man page for other daemon options . |
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Last Updated on Saturday, 26 February 2011 04:59 |
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VMware to Xen image conversion guide |
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Written by geekyB
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Monday, 02 February 2009 07:48 |
This Geekyfacts document has detailed steps about converting a Windows VMware guest image into a Xen guest image. The document expects you to have good knowledge of Vmware and Xen. To convert a Vmware image (vmdk file) to Xen compatible image, the steps listed below has to be followed. There are 3 major activities involved in this- Update Vmware Windows machine's registry entries
- Convert the image to xen format
- Configure the image as xen vm.
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Netapp - How to disable snapshot for a volume |
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Written by geekyS
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Tuesday, 06 January 2009 06:39 |
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Perform the following steps to disable automatic snapshot for a volume, Disable the snapshot schedule for the volume
Below command will disable the snapshot schedule for the volume "testvol" filer > snap sched testvol
Volume testvol: 2 4 8@2,4,6,12,16
filer > snap sched testvol 0 0 0
filer > snap sched testvol
Volume testvol: 0 0 0
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Last Updated on Tuesday, 06 January 2009 07:53 |
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Netapp Admin guide : Basics |
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Written by geekyB
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Tuesday, 13 January 2009 08:14 |
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This GeekyFacts Netapp beginner guide has details about basic Netapp commands and an example to explain each command.
How to find Data Ontap version on a filer :
geekyFiler> version
NetApp Release 7.3P3: Wed Sep 17 22:29:32 PDT 2008
How to find "uptime" of a filer?
The uptime command gives system uptime, similar to Unix. Also it gives number of NFS, CIFS, FCP, iSCSI operations on a Netapp filer.
geekyFiler*> uptime
8:58pm up 23 days, 43 mins, 1354234 NFS ops, 940 CIFS ops, 0 HTTP ops, 0 FCP ops, 0 iSCSI ops
geekyFiler*>
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Last Updated on Tuesday, 13 January 2009 08:25 |
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Tunable Virtual memory kernel parameters : Part 1 |
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Written by geekyB
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Monday, 05 January 2009 17:22 |
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This document gives you details about tunable virtual memory parameters in Linux, that can help you to improve your system performance. vm.nr_hugepages
Linux 2.6 has the feature which allows processes to use large paging sizes, called as hugetlb pages. This feature will be used to gain good performance in high performance computing systems. Hugetlb behavior is similar to that of bigpages, the pages are backed by large TLB entries, are not pageable, and are preallocated, which means that once you allocate X megabytes of hugetlb pages, that amount of physical memory can be used only through hugetlbfs.
/proc/meminfo also provides information about the total number of hugetlb pages configured in the kernel. It also displays information about the number of free hugetlb pages at any time. It also displays information about the configured hugepage size - this is needed for generating the proper alignment and size of the arguments to the above system calls. |
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Last Updated on Monday, 05 January 2009 17:31 |
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