Exadata V2数据库一体机的几大致命缺点
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：
- Exadata Cells from 11.2.1.3.1 to 11.2.2.2.0
- Exadata database nodes from 11.2.1.3.1 to 11.2.2.2.0
- 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
- Upgrade kernel on database nodes
- Upgrade GI Home to 11.2.0.2
- Upgrade ALL RDBMS Homes to 11.2.0.2
- Upgrade the database to 11.2.0.2
- 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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