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Thursday, October 9, 2014

Exadata 11.2 Support



Попался  хороший документ:

page 6:
Oracle Database 11gR2:The Extended Support fee has been waived for the period of February 2015 – January 2016. During this period, you will receive Extended Support during these periods as described in the Oracle Technical Support Levels section below.

Page8:
Oracle Exadata Storage Server Software 11.2 (program releases 11.2.3.2.2 and above): The Extended Support fee will be waived from October 2014 – September 2015.

Что это значит: 
на 1 год продлена не Premier поддержка, а Extended поддержка освобождена от дополнительной оплаты в +10%. 
Т.е. Extended вступает в силу с января 15 года в любом случае.

Extended:
For DB 11.2 - until January 1
For Storage Server Software - until September 2015.

Tuesday, October 7, 2014

timed out waiting for input: auto-logout

I connected to db node of Exadata and after some idle time I was disconnected from server with the message:

[root@ed02dbadm02 ~]# timed out waiting for input: auto-logout

Connection closed.

As I remember my terminal can stay connected to Exadata all day, many hours.  
Whats the matter ? It is something new ...


Internet explain this behaviour:

Auto-Logout Timeout in SSH


The ssh "timed out waiting for input: auto-logout" messages is generated by ssh upon reaching a auto-logout after an inactivity time specified by the TMOUT environment variable. If this variable is not set your session will not be auto-logged out due to inactivity. If the environment variable is set, your session will be automatically closed/logged out after the amount of seconds specified by the TMOUT variable.

To see if your auto-logout variable is set and/or see what it is set to issue the following command:
 $ echo $TMOUT

Often this value is defined in /etc/profile (globally) or your user's profile (~/.profile or ~/.bash_profile).

To alter the auto-logout amount, set the TMOUT environment variable accordingly:
* TMOUT=600   #set an auto-logout timeout for 10 minutes
* TMOUT=1200  #set an auto-logout timeout for 20 minutes
* TMOUT=   #turn off auto-logout (user session will not auto-logout due to session inactivity)

This value can be set globally (e.g. TMOUT=1200) in the /etc/profile file;

Monday, October 6, 2014

Exadata X5-2


Прошел OpenWorld но Х5-2 так и не появилась.
Тем не менее в продолжение предыдущей темы
http://exadata-dba.blogspot.ru/2014/08/exadata-x5.html
:

В августе Seagate выпустил 8Т-диски.А Hitachi делает 10Т.


В общем, ответ на вопрос какие диски будут стоять в Экзадате Х5 - практически очевидный.
В 1/4 будет где-то от 36*8 до 36*18 = 280-350 Т сырой емкости.

Wednesday, September 24, 2014

Hard Drive Reliability Statistics


https://www.backblaze.com/blog/hard-drive-reliability-update-september-2014/

In Russian:

http://www.opennet.ru/opennews/art.shtml?num=40656

Tuesday, September 16, 2014

Is it good idea to connect production and standby Exadatas by Infiniband ?

Some time ago I used to think that the two Exadatas (production and standby) is better to bind by IB.
But from now i think otherwise:



"Primary and standby databases should NOT reside on the same IB Fabric"




Oracle Sun Database Machine Setup/Configuration Best Practices (Doc ID 1274318.1)