tonydlut
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I've written before about how Exalogic enables Oracle Middleware products to use Sockets Direct Protocol (SDP) under the covers, rather than TCP-IP, to achieve lower latency communication over an InfiniBand network. Originally, the capability to leverage SDP was limited to Oracle internal-only APIs ...
For version 1.0 of Exalogic there is a number of Exalogic-specific enhancements and optimisations that have been made to the Oracle Application Grid middleware products, specifically:
the WebLogic application server product;
the JRockit Java Virtual Machine (JVM) product;
the Coherence in-memo ...
Xa resource is used where there is a distributed transaction is required.==============================================According to my knowledge XA drivers are used for globule transaction..and non XA drivers are used for local transaction..=========================================================== ...
Link aggregation
- 博客分类：
- 网络基础
In computer networking, the term link aggregation applies to various methods of combining (aggregating) multiple network connections in parallel in order to increase throughput beyond what a single connection could sustain, and to provide redundancy in case one of the links should fail. A LAG (Link ...
1 Weblogic Muxer Socket Thread
Weblogic has Thread group called ‘Weblogic Muxer’, once you take thread dumps you could see always 4-8 running Muxer Threads e.g. ExecuteThread: '3' for queue: 'weblogic.socket.Muxer
Muxer threads plays very important role when your Production environment ...
Use one of the following methods to find Oracle WebLogic Server version
1. From registry.xml in MW_HOMEGo to Middleware Home under which WebLogic is installed and look for file registry.xmlOpen registry.xml and search for “component name=”WebLogic Server”” version=”10.3.3.0″ (variable version next ...
ZFS on Linux
- 博客分类：
- Linux
转：http://www.andybotting.com/zfs-on-linux
ZFS is a fantastic filesystem developed by Sun. Compared to other filesystems, it’s quite interesting as it combines both a filesystem and a logical volume manager. This allows you to get great flexibility, features and performance. It supports things l ...
LVM snapshots explained
- 博客分类：
- Linux
This article explains how LVM snapshots work and what the advantage of read/write snapshots is.
We will go through a simple example to illustrate our explanation.
First, create a dummy device that we will initialize as a PV:
# dd if=/dev
一、RAID 简介
RAID 是英文Redundant Array of Independent Disks 的缩写，翻译成中文意思是“独立磁盘冗余阵列”，有时也简称磁盘阵列（Disk Array）。
简单的说，RAID是一种把多块独立的硬盘（物理硬盘）按不同的方式组合起来形成一个硬盘组（逻辑硬盘），从而提供比单个硬盘更高的存储性能和提供数据备份的技术。
组成磁盘阵列的不同方式称为RAID级别（RAID Levels），常见的RAID Level 包括raid0, raid1, raid5, raid10。各level 对比如下：
RAID等级
最少硬盘
最大容错
可用容量 ...
CentOS 6.3下配置LVM（逻辑卷管理）
- 博客分类：
- Linux
一、简介
LVM是逻辑盘卷管理（Logical Volume Manager）的简称，它是Linux环境下对磁盘分区进行管理的一种机制，LVM是建立在硬盘和分区之上的一个逻辑层，来提高磁盘分区管理的灵活性。
LVM的工作原理其实很简单，它就是通过将底层的物理硬盘抽象的封装起来，然后以逻辑卷的方式呈现给上层应用。在传统的磁盘管理机制中，我们的上层应用是直接访问文件系统，从而对底层的物理硬盘进行读取，而在LVM中，其通过对底层的硬盘进行封装，当我们对底层的物理硬盘进行操作时，其不再是针对于分区进行操作，而是通过一个叫做逻辑卷的东西来对其进行底层的磁盘管理操作。比如说我增加一个物理硬盘，这个时候 ...
linux 路由表 的一些相关资料
- 博客分类：
- 网络基础
===============================================================================
linux 路由表维护
查看 Linux 内核路由表
使用下面的 route 命令可以查看 Linux 内核路由表。
# route
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 * 255.255.255.0 U 0 ...
【转至】http://blog.csdn.net/turui/article/details/2048582
一直以来对公钥和私钥都理解得不是很透彻，感觉到模棱两可。今天在网上找了半天，通过查看对这个密钥对的理解，总算弄清楚了。
公钥和私钥就是俗称的不对称加 ...
HTTP（HyperTextTransferProtocol）是超文本传输协议的缩写，它用于传送WWW方式的数据，关于HTTP协议的详细内容请参
考RFC2616。HTTP协议采用了请求/响应模型。客户端向服务器发送一个请求，请求头包含请求的方法、URI、协议版本、以 ...
在WebLogic 10.3.4中，为了增强对RAC的支持，Oracle推出了Gridlink Data Source，取代原先的Multi Data Source：
http://download.oracle.com/docs/cd/E17904_01/web.1111/e13737/jdbc_intro.htm#BHCBACAG
Enhanced Oracle RAC Support
This release provides a new data source type, a GridLink Data Source, to provide enhanced su ...
http://maping930883.blogspot.com/2009_03_01_archive.html