Netapp deduplication
cloudibee Netapp deduplication – is a new technology to control the rate of data growth. The average UNIX or Windows disk volume contains thousands or even millions of duplicate data objects.…
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HPUX tips
1) Find number of processors in the machine. # /usr/sbin/ioscan -k -C processorH/W Path Class Description===============================160 processor Processor166 processor Processor# 2) Find the model of the hardware # model9000/800/L2000-44# 3)…
AIX performance monitoring : filemon
“filemon” command monitors the performance of the file system, and reports the I/O activity. The I/O activity monitored is based on the time interval during which the filemon is run.…
HP-UX : Kernel Parameter Recommendations
Below is the list of commonly recommended HPUX kernel parameters. But this may vary based on your application need. # Parameter Value bufpages 0 # on HP-UX 10.X create_fastlinks 1…
HPUX : Identify 32-bit or 64-bit kernel
Here are the steps to identify whether you are running a 32-bit or 64-bit kernel. getconf KERNEL_BITS will return whether it is a 32 bit or 64 bit. hpux1 #…
Oracle’s Direct NFS
Direct NFS (DNFS) is an Oracle Database 11g implementation of NFS client that runs as part of the Oracle Database 11g engine. Through this integration, the Oracle database engine optimizes…
Few /proc files
/proc/cmdline – file has the parameters passed to the kernel while the system boots-up. /proc/kcore – This file represents the physical memory of the system and is stored in the…
Know about Netapp Snapvault
Netapp SnapVault is a heterogeneous disk-to-disk backup solution for Netapp filers and systems with other OS (Solaris, HP-UX, AIX, Windows, and Linux). In event of data loss or corruption on…
AIX : Managing service subsystem
lssrv , stopsrc and startsrc are used to manage service subsystem in AIX. lssrc lists out all services that are active and inactive. “startsrc” and “stopsrc” are used to start…
Netapp VIFs loadbalancing
NetApp loadbalancing algorithm for determining ethernet load balancing (vifs) differs from Cisco, so it’s normal to see unbalanced traffic in Netapp vifs. The Cisco method for determining load balancing is…
Steps to create initrd
Creating initrd using mkinitrd # mkinitrd -v -f –with=e1000 /tmp/initrd.gz 2.6.9-55 Extracting the initrd image to add contents in it # mkdir /initrdroot# cd /initrdroot# gzip -dc /tmp/initrd.gz | cpio…
Resizing ext3 filesystem
The ext3 filesystem on Linux can be resized using ext2online . This can only be done when the filesystem is online (mounted) and where the the filesystem is on a…
Windows provisioning from PXE
Two opensource solutions through which you can provision Windows servers by network booting from a Linux PXE : http://unattended.sourceforge.net/http://unattended-gui.sourceforge.net/ Good one & they worked for me.
NFS mount options
Some important nfs mount options in Linux. tcp – Specifies for the NFS mount to use the TCP protocol instead of UDP. rsize=8192 and wsize=8192 – These settings speed up…
Netapp Flexshare
A very good demo on Netapp Flexshare and how it impacts performance : http://www.netapp.com/ftp/flash/flexshare-demo/flexshare_demo.html