Distributed Computing

没想到想做"D"的人这么多……

Google了一下发现无数模块的实现……

New P2P framework

Today I have some ideas about P2P application framework. Would check if there is any available ones and whether they can fulfil my ideas. Maybe I would start a project to implement these ideas in Python and/or C++.

qmail最有效率的情形是3000-10000 queue的情形？！

由于某种原因需要一口气inject大约80万封信，结果中间就不成了。后来发现似乎3000-10000/queue为宜。什么原因呢？

Google WebAccelerator

So it happens.

As the website states, it works by:

• Sending your page requests through Google machines dedicated to handling Google Web Accelerator traffic.
• Storing copies of frequently looked at pages to make them quickly accessible.
  Downloading only the updates if a web page has changed slightly since you last viewed it.
• Prefetching certain pages onto your computer in advance.
• Managing your Internet connection to reduce delays.
• Compressing data before sending it to your computer.

postfix to release 2.2.0

Today, Wietse Venema has announced postfix 2.2.0-RELEASE. To quote him:

The official Postfix 2.2 release adopts widely used third-party patches and a bunch of new functionality that was developed over the past year. Below is a summary of the changes. These and more are detailed in the RELEASE_NOTES document, which also describe the incompatible changes that you should be aware of BEFORE upgrading from Postfix
2.1 or earlier.

• TLS and IPv6 support are now built into Postfix, based on code
  from third-party patches.

• Extended query interface for LDAP, MySQL and PostgreSQL with free
  form SQL queries, and domain name filters to reduce unnecessary
  lookups.

FreeBSD iSCSI implementation

Someone has disclosed that he is implementing iSCSI on FreeBSD, at scsi@. iSCSI is essential technology that is highly scalable and looks quite promising.

和hd聊了聊关于GNS等等的想法

在火车上跟HD聊了聊关于GNS等等一系列项目的想法。所谓GNS是一个全局的目录服务，包括客户和服务器两部分，客户运行在提供各种不同服务的机器上(www, databases, etc)。

客户启动时，向服务器发出一个「WAKEUP」信号，服务器则向需要该服务的所有服务器发出同样信号；反之，当客户所在的机器准备下线时，也类似地发出信号。

www, databases等服务的consumer据此在自己的本地可用服务表中添加/删除目录项。

The Sprite Operating System

Sprite is a research operating system developed at the University of California, Berkeley, by John Ousterhout’s research group.

Sprite is a distributed operating system that provides a single system image to a cluster of workstations. It provides very high file system performance through client and server caching. It has process migration to take advantage of idle machines. It was used as a testbed for research in log-structured file systems, striped file systems, crash recovery, and RAID file systems, among other things.

Preparing for disseration answering

I will be answering questions about my disseration on 16th, June. I will work hard for the answering, including PowerPoint Presentation, the design and implementation internals of the GridDistribute system, etc.

为delphij.net添加了一个备份MX

alu连夜帮忙配了一台备份的MX，总算是能够让断网期间少丢两封邮件了……这台备份的MX将在beastie.frontfree.net恢复时将邮件传递给它。我这都是在折腾什么？:|

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