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HomeDatabaseMysql TutorialExadata V2数据库一体机的几大致命缺点

Exadata V2数据库一体机的几大致命缺点

Jun 07, 2016 pm 03:38 PM
One machineclientdatabaseyesterdayshortcoming

昨天客户语重心长的告诉我,他们准备把Exadata V2 上的核心应用迁移走,客户在09年就开始用Exadata,是不是国内第一家我不知道,但至少应该是用于生产的第一批。但是这2年来因为Exadata折腾了无数次,现在终于不想折腾了。实际是用户在测试Exadata时总是能看

昨天客户语重心长的告诉我,他们准备把Exadata V2 上的核心应用迁移走,客户在09年就开始用Exadata,是不是国内第一家我不知道,但至少应该是用于生产的第一批。但是这2年来因为Exadata折腾了无数次,现在终于不想折腾了。实际是用户在测试Exadata时总是能看到其优点,但实际使用时只看到缺点了!


历数Exadata V2数据库一体机的几大致命缺点


1.软硬件一体,耦合过于紧密 
2.升级操作十分复杂,客户看到升级流程后几乎绝望 
3.国内使用经验贫乏 
4.support只有Oracle自己一家,没有第三方可选 

5.就以往的表现来看美国支撑的X team并不给力。。。。。。


Exadata上复杂的数据库升级步骤:

Infiniband Switch – > Exadata Storage Software – > Exadata Host Minimal Patch -> Grid Infrastructure – > Database

客户视角的Exadata 详细升级过程:

  1. Exadata Cells from 11.2.1.3.1 to 11.2.2.2.0
  2. Exadata database nodes from 11.2.1.3.1 to 11.2.2.2.0
  3. Applying a number of pre and post patching fixes (addendums to the standard patching instructions,probably included due to customer reported issue with eth patching
  4. Upgrade kernel on database nodes
  5. Upgrade GI Home to 11.2.0.2
  6. Upgrade ALL RDBMS Homes to 11.2.0.2
  7. Upgrade the database to 11.2.0.2
  8. Apply 11.2.0.2 BP2 to ALL Homes(Part of this need to be done manually ,as opatch auto doesn’t work when the installation has different GI and RDBMS owners)

升级流程图:



这升级步骤不是人写的,有木有?!

Exadata上的 Bundle Patch (Replaces recalled patch 8626760) 是可以recall 召回的有木有?!

#别去搜这个patch,说了recall了就是不会让你能找到了!

号称出厂即最优的配置,结果连简单的ulimit-memlock参数设置都有问题的情况,有木有?


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