Shulou(Shulou.com)05/31 Report--

How to carry out AIX minicomputer learning analysis, I believe that many inexperienced people do not know what to do. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

1. Check the system: command: # df-k

% Used is the file system usage. The utilization of all file systems cannot be greater than 80%

2. Inspection of tape drive cleaning: command:

# / usr/lpp/diagnostics/bin/utape-cd rmt0-n

The display result is the number of hours used by the tape drive. If it is more than 72 hours, clean tape cleaning will be applied regardless of whether the yellow light of the tape drive is on or not.

3. Detection of letter system:

A. status of the network card: command:

# ifconfig-a

Output judgment:

En0: flags=e080863

Inet 192.9.200.2 netmask 0xffffff00 broadcast 192.9.200.255

En1: flags=e080863

Inet 192.9.201.1 netmask 0xffffff00 broadcast 192.9.200.255

It is normal that the flag of the master / slave Nic is UP. Check that both the ip address and netmask are correct.

B. Route detection

Command:

# lsattr-El inet0

Authm 65536 Authentication Methods True

Hostname h34 Host Name True

Gateway Gateway True

Route net,0172.16.23.81 Route True

Bootup_option no Serial Optical Network Interface True

Rout6 FDDI Network Interface True

C. Detection of collaterals

Command:

# ping [ip address]

Output judgment:

Use the ping command to operate the IP address in the / etc/hosts file to detect whether the network is connected.

Whether the Hotspare property of RAID is turned on

# smitty ssaraid? Change/Show Attributes of an SSA RAID Array

Check whether the Enable Use of Hot Spares property is YES

4. Check the DUMP settings of the system

Command:

# sysdumdev-l

Output judgment:

The result should be

Primary / dev/hd6

Secondary / dev/sysdumpnull

Copy directory / var/adm/ras

Forced copy flag TRUE

Always allow dump FALSE

Dump compression OFF

If it is incorrect, modify it with the following command:

# sysdumdev-P-p / dev/hd6-s / dev/sysdumpnull

5.HACMP configuration Detection: Cluster Verification:

Command:

# / usr/sbin/cluster/diag/clconfig-v'- tr'

Output judgment:

As a result, there is no Fail item output.

6. System hardware diagnostics:

The order of commands is:

1.#diag

2.Enter

3.Diagnostic Routines

4.System Verification

5.All Resources

6.F7

Output judgment:

The result should be No trouble was found.

7. Check for patch (PTF)

The system maintenance patch version is ML09, and the check command is: # instfix-I | grep ML

8. Check of system parameters

A.HIGH water mark for pending write I/Os

# lsattr-El sys0 | grep maxpout

Output judgment:

The result should be

Maxpout 33 HIGH water mark for pending write I/Os per file True

B.LOW water mark for pending write I/Os

# lsattr-El sys0 | grep minpout

Output judgment:

The result should be

Minpout 24 LOW water mark for pending write I/Os per file True

Change the command to:

# chdev-l sys0-a maxpout='33'-a minpout='24'

C.Syncd parameter

# grep syncd / sbin/rc.boot

Output judgment:

The result should be

Nohup / usr/sbin/syncd 10 > / dev/null 2 > & 1 &

Change the command to:

# vi / sbin/rc.boot

D.aio parameter

# lsdev-Cc aio

Output judgment:

The result should be

Aio0 Available Asynchronous I/O

# lsattr-El aio0

Output judgment:

The result should be

Minservers 1 MINIMUM number of servers True

Maxservers 10 MAXIMUM number of servers True

Maxreqs 4096 Maximum number of REQUESTS True

Kprocprio 39 Server PRIORITY True

Autoconfig available STATE to be configured at system restart True

Fastpath enable State of fastpath True

Change the command to:

# smitty aio

Settings for the e.Limits file:

# ulimit-a

Output judgment:

The result should be

Time (seconds) unlimited

File (blocks) 2097151

Data (kbytes) 262144 / / especially this parameter

Stack (kbytes) 32768

Memory (kbytes) 32768

Coredump (blocks) 2097151

Nofiles (descriptors) 2000

Change the command to:

# vi / etc/security/limits

Change data to 524288

9. The battery of the SSA card can see the battery life of the SSA card with the following command:

/ usr/lpp/diagnostics/bin/ssa_fw_status-a ssan

10. There is not enough dump device space:

1. Use sysdumpdev-l to see dump device.

2. Estimate the size of dump by sysdumpdev-e.

3. Expand the size of dump device as needed.

11. The percentage of files in the view / var:

1 、 cd / var

2. Du-a | sort-rn | more

12. Size of JFS LOG:

1. The maximum JFS LOG is 256MB.

2. 2MB JFS LOG can support file systems of 4GB size.

3. The file system of 1 100GB does not necessarily need 50MB's JFS Log, but also depends on the number of files in the file system and the commonness of modification.

4. Multiple file systems can use the same JFS LOG, but for very busy file systems, you should establish their own JFS LOG and put the JFS LOG on different PV as much as possible. In addition, it is recommended that in some complex environments, you should avoid using the JFS LOG: loglvxx created automatically when creating a file system in some complex environments. You should specifically rename the loglvxx according to the naming rules or create a new JFS LOG, so as to avoid the occurrence of LV duplicate names in different systems when importvg.

13: the method of finding files larger than a byte:

Find-size + file size. The file size found by-size is calculated in terms of 512 bytes. For files larger than 15MB, use find /-size + 30720.

After reading the above, have you mastered the method of learning and analyzing AIX minicomputer? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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