월: 2012 12월

[ZDNet 컬럼] 가장 강력하고 안전한 리눅스 서버, Linux on zEnterprise!

스크린샷-2012-12-14-오전-11.34.06

ZDNet에 기고한 컬럼이 떳네요. 잘 설명이 되었을려나 모르겠습니다. 🙂

가장 강력하고 안전한 리눅스 서버, Linux on zEnterprise!

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Linux on System z Kernel Dumps

2010년 Enterprise Systems Media에 게재된 기사입니다. 리눅스 커널 덤프에 대한 간단한 히스토리를 얘기하고 있고, 또 System z에서만 사용하는 Standalone Dump에 대해서 소개하고 있습니다. 리눅스 커널 덤프에 대한 개략적인 내용을 알 수 있는 기사라 링크합니다.

Linux on System z Kernel Dumps

이와 더불어, 아래와 같은 일정으로 “kdump on System z”라는 웹캐스트가 진행될 예정이니 관심있으신 분들께서는 참여해서 들어보시는 것도 좋을 듯 합니다.

Target audience: Linux on System z Customers: IT Manager, IT Administrator, System Administrator
Date & Time: Wednesday, December 19, 2012 at 12:00 PM ET, 17:00 UTC & Thursday, December 20, 2012 at 8:00 UTC

Duration: 75 minutes

Technical level: Intermediate

Abstract: The Linux kernel code is robust, but even the best kernel hackers are only human and make mistakes. So, while kernel crashes are rare, they can occur and are unpleasant events. To find the cause of such crashes, kernel dumps containing the crashed system state are often the only available approach.Because mainframes traditionally run mission critical workloads, there is a particular big focus on the serviceability of the platform. Customers expect that all problems are solved in a short time. Therefore, when Linux was ported to s390 beginning of 2000, IBM also provided a reliable kernel dump mechanism. This was about five years before kdump was integrated into the upstream Linux kernel.In some areas, kdump offers advantages over the traditional s390 dump methods. Therefore, in 2011, kdump was ported to s390. The code was enriched by specific s390 features and, as much as possible, kdump was integrated into the existing s390 dump infrastructure.
This presentation reviews the traditional s390 Linux kernel dump methods, describes the specifics of the s390 kdump port, and explains the integration into the existing s390 dump infrastructure.

See also: http://enterprisesystemsmedia.com/article/linux-on-system-z-kernel-dumps

Michael presented this topic at the ‘LinuxCon Europe’ in Barcelona in November this year.

Note: we will be using Adobe Connect for this webcast: Audio support is only by VOIP

Speaker: Michael Holzheu, Linux kernel developer, IBM Boeblingen

Date: December 19, 2012 (US/Canada/LA/Europe)
Time: 12:00 PM ET / 11:00 AM CT / 6:00 PM Boeblingen / 17:00 UTC
Registration Link: http://ibmstg.adobeconnect.com/kdumpsystemzamericas12192012e/event/registration.html

Date: December 20, 2012 (Asia/Australia/Europe)
Time: 9:00 AM Boeblingen / 08:00:00 UTC / 03:00 AM ET
Registration Link: http://ibmstg.adobeconnect.com/kdumpsystemzapemea12202012e/event/registration.html

After registering you will receive a confirmation email containing information about joining the Webcast.
If you can not join us for this session, the replay will be available after December 22nd on the z/VM LVC website at http://www.vm.ibm.com/education/lvc/

CMSVMLIB problem

가끔 cold start를 하여 spool정보가 깨져 아래와 같은 에러가 발생할 때 recovery하는 방법입니다.

> DMSDCS1083E Saved segment CMSVMLIB does not exist
>
> i cms
> 07:31:35 HCPCLT044E System CMS does not exist

* segments (like CMSVMLIB) 재생성

EXEC VMFBLD PPF SEGBLD ESASEGS SEGBLIST (ALL
ACCESS 190 T
COPYFILE SYSTEM SEGID D = = T (REPLACE OLDDATE

* CMS 재생성

ACCESS 193 R
SAMPNSS CMS
IPL 190 PARM SAVESYS CMS