AIX GLOBAL

There are three types of backup methods:1) Full backupAll the file are put into media during full backup.The advantages are:Restoring from a full backup lowers the tape handling activities compared to an incremental or differential backup.The content from media is from within the same backup window (rollback and redundancy)The disadvantages are The backup window is wide.if the data does not change,...

The mksysb command create a bootable image of all mounted file systems on the rootvg volume group. The root volume group image is in backup file format, starting with data files and then any optional map files. The image file contains information describing the image installed during the BOS installation process. This information includes the names, sizes, maps and mount points of logical volumes...

Reduced time to deployment IBM HPC clustering offers significant price/performance advantages for many high-performance workloads by harnessing the advantages of low cost servers plus innovative, easily available open source software.Today, some businesses are building their own Linux and Microsoft clusters using commodity hardware, standard interconnects and networking technology, open source software,...

IBM System Cluster 1600 systems are comprised of IBM POWER5™ and POWER5+™ symmetric multiprocessing (SMP) servers running AIX 5L™ or Linux®. Cluster 1600 is a highly scalable cluster solution for large-scale computational modeling and analysis, large databases and business intelligence applications and cost-effective datacenter, server and workload consolidation. Cluster 1600 systems can be deployed...

* Advanced IBM POWER6™ processor cores for enhanced performance and reliability* Building block architecture delivers flexible scalability and modular growth* Advanced virtualization features facilitate highly efficient systems utilization* Enhanced RAS features enable improved application availabilityThe IBM POWER6 processor-based System p™ 570 mid-range server delivers outstanding price/performance,...

Mirror Write Consistency (MWC) ensures data consistency on logical volumes in case asystem crash occurs during mirrored writes. The active method achieves this by loggingwhen a write occurs. LVM makes an update to the MWC log that identifies what areas ofthe disk are being updated before performing the write of the data. Records of the last 62distinct logical transfer groups (LTG) written to disk...

The objectives of the Web-based System Manager are:• Simplification of AIX administration by a single interface• Enable AIX systems to be administered from almost any client platform with a browserthat supports Java 1.3 or use downloaded client code from an AIX V5.3 code• Enable AIX systems to be administered remotely• Provide a system administration environment that provides a similar look and feel...

/var/adm/sulog Switch user log file (ASCII file). Use cat, pg ormore to view it and rm to clean it out./etc/security/failedlogin Failed logins from users. Use the who commandto view the information. Use "cat /dev/null >/etc/failedlogin" to empty it,/var/adm/wtmp All login accounting activity. Use the whocommand to view it use "cat /dev/null >/var/adm/wtmp" to empty it./etc/utmp Who has logged...

What is an LVM hot spare?A hot spare is a disk or group of disks used to replace a failing disk. LVM marks a physicalvolume missing due to write failures. It then starts the migration of data to the hot sparedisk.Minimum hot spare requirementsThe following is a list of minimal hot sparing requirements enforced by the operatingsystem.- Spares are allocated and used by volume group- Logical volumes...

List the licensed program productslslpp -LList the defined devices lsdev -C -HList the disk drives on the system lsdev -Cc diskList the memory on the system lsdev -Cc memory (MCA)List the memory on the system lsattr -El sys0 -a realmem (PCI)lsattr -El mem0List system resources lsattr -EHl sys0List the VPD (Vital Product Data) lscfg -vDocument the tty setup lscfg or smit screen capture F8Document...

This chapter describes the boot process and the different stages the systemuses to prepare the AIX 5L environment.Topics discussed in this chapter are: The boot process System initialization The /etc/inittab file How to recover from a non-responsive boot process Run levels An introduction to the rc.* fil...

The fundamental concepts used by LVM are physical volumes, volume groups,physical partitions, logical volumes, logical partitions, file systems, and rawdevices. Some of their characteristics are presented as follows: Each individual disk drive is a named physical volume (PV) and has a namesuch as hdisk0 or hdisk1. One or more PVs can make up a volume group (VG). A physical volume canbelong to a...

Specifying the default gateway on a specific interfaceWhen you're using HACMP, you usually have multiple network adapters installed and thus multiple network interface to handle with. If AIX configured the default gateway on a wrong interface (like on your management interface instead of the boot interface), you might want to change this, so network traffic isn't sent over the management interface....

Useful HACMP commandsclstat - show cluster state and substate; needs clinfo. cldump - SNMP-based tool to show cluster state cldisp - similar to cldump, perl script to show cluster state. cltopinfo - list the local view of the cluster topology. clshowsrv -a - list the local view of the cluster subsystems. clfindres (-s) - locate the resource groups and display status. clRGinfo -v - locate the resource...

Hacmp can be configured in 3 ways.1. Rotating2. Cascading3. Mutual FailoverThe cascading and rotating resource groups are the “classic”, pre-HA 5.1 types. The new “custom” type of resource group has been introduced in HA 5.1 onwards.Cascading resource group:Upon node failure, a cascading resource group falls over to the available node with the next priority in the node priority list.Upon node reintegration...

Authorization/authentication administration ____Report all password inconsistencies and not fix them: pwdck –n ALL ____Report all password inconsistencies and fix them: pwdck –y ALL ____Report all group inconsistencies and not fix them: grpck –n ALL ____Report all group inconsistencies and fix them: grpck –y ALL ____Browse the /etc/shadow, etc/password and /etc/group file weekly SUID/SGID ____Review...

AIX Security Checklist AIX Environment Procedures The best way to approach this portion of the checklist is to do a comprehensive physical inventory of the servers. Serial numbers and physical location would be sufficient. ____Record server serial numbers ____Physical location of the servers Next we want to gather a rather comprehensive list of both the AIX and pseries inventories. By running these...

As stated above, each network defined to HACMP should have at least two adapters per node. While it ispossible to build a cluster with fewer, the reaction to adapter failures is more severe: the resource groupmust be moved to another node. AIX provides support for Etherchannel, a facility that can used to aggregateadapters (increase bandwidth) and provide network resilience. Etherchannel is particularly...

HACMP BasicsHistoryIBM's HACMP exists for almost 15 years. It's not actually an IBM product, they bought it from CLAM, which was later renamed to Availant and is now called LakeViewTech. Until august 2006, all development of HACMP was done by CLAM. Nowadays IBM does it's own development of HACMP in Austin, Poughkeepsie and BangaloreIBM's high availability solution for AIX, High Availability Cluster...

/usr/sbin/cluster/etc/rhosts --- to accept incoming communication from clcomdES (cluster communucation enahanced security)/usr/es/sbin/cluster/etc/rhostsNote: If there is an unresolvable label in the /usr/es/sbin/cluster/etc/rhosts file, then all clcomdES connections from remote nodes will be denied.cluster manager clstrmgrEScluster lock Daemon (clockdES)cluster multi peer extension communication...

Graceful For graceful failover, you can run “smitty clstop” then select graceful option. This will not change anything except stopping the cluster on that node.Note: If you stop the cluster, check the status using lssrc –g cluster, sometimes clstrmgrES daemon will take long time to stop, DO NOT KILL THIS DAEMON.It will stop automatically after a while.You can do this on both the nodes2. TakeoverFor...