Lowyat.NET: Latest topics by YiQi

[WTB] Sapphire HD3470

YiQi — Fri, 09 Jan 2009 09:35:45 +0800

Item(s): Sapphire HD3470

Price: <$150 (new) <$100 (2nd)

Dealing method: COD

Location of buyer: Old klang road, Puchong, PJ around Bandar Utama

Contact method/details: PM

Age of item: New / 2nd hand

Want to buy HD3470 PCI-e card, new (<$150) or 2nd(<$100) also can.
Sapphire is prefer brand, if got other brand also OK.

[Release] Debian GNU/Linux 4.0 Etch

YiQi — Mon, 09 Apr 2007 22:42:44 +0800

The long-delayed Debian GNU/Linux 4.0 "Etch" was finally released.

News: http://www.debian.org/News/2007/20070408

Release Notes: http://www.debian.org/releases/etch/i386/release-notes/

Download: http://www.debian.org/releases/stable/

First Impression: http://opensourcelearning.info/blog/?p=318
First Review: http://lunapark6.com/debian-40-etch.html

Enjoy!!

Seagate ES 320GB

YiQi — Mon, 05 Mar 2007 23:15:49 +0800

Hello,

Manage to find Seagate ES 250GB on pricelist.
However, try to ask if got 320GB last month, reply was "The smallest of ES is 400GB... @#$%"
This Sunday, try to asked again, reply was "Can try to ask supplier, but supplier not open business on Sunday."
So, can someone (who know them better) here tell me (or help me to ask), can I (pre)order Seagate ES 320GB from Cycom and what is the price?

Thanks a lot!

[share] Thinking about how TMNut throttle P2P

YiQi — Thu, 01 Feb 2007 17:10:21 +0800

Well, today is 1st Feb, the first day of the month.
When people of Selangor & KL enjoying public holiday, P2Pers enjoy the "Speed is Back"...
But, do you wonder why it just happen suddenly? For no reason? Or because of 99% international link restored?

Well, well, well. Being a system/network administrator, who also implement some kind of P2P throttlering in my office, I think I should share a bit information to forumers.

I will use the setup in my office's firewall as example. It doesn't mean the same way how TMNut's Screamyx system works.

1. We have limited bandwidth, 1.5Mbps for Internet.
2. Without throttlering, P2P traffic will definitely eat up all traffic and cause others service, eg. Email, Web, DNS very very slow.

I split 1.5Mbps into 2 pools, A is 1Mbps, B is 0.5Mbps.
Pool A is for normal usage, typically Email, Web, DNS, VPN.. etc.
Pool B is for low priority usage, anything which is not belongs to Pool A.
However, bandwith for Pool A is strictly protected, which means even it is not fully utilize, it can not lend the bandwith to Pool B. However, Pool B is open, which mean if Pool A is 100% utilize, Pool A can borrow bandwith from Pool B.

So, think about it, if 10 people using P2P at the same time, you will only get 500Kbps / 10 = 50Kbps ~ 6KB/s. The more people using P2P, the less average speed for each. And some more, bandwith will be borrowed to higher priority usage in Pool A.

So, do I need to monitoring all the time?
No, once setup, it runs all the way. Only occasionally tweak a bit in Pool A to allow new services.

Well, how about Screamyx?

I suspect they have multiple pools for different segment (by network class? by area? by DSLAM...?) So, if you are in the pool that not so many people downloading using P2P, you are getting higher speed, but from time to time.

Remember? Today is 1st of Feb, a new beginning of the month.
So, don't joy too fast. What if Screamyx implement the 'quota' method for each user, e.g you have 50GB per month. Today is just a new accounting day, that's why you still have a long way to reach your limit. Once you reach, sorry, you're throttled again.
The Quota Limitation is my assumption only. If this is really true, it can be various type of setting. e.g Daily base, Monthly base, or even Daily+Monthly base.

So, guys, don't celebrate too fast, don't run too fast. Keep monitoring until end of this month.

Sorry for my lousy english...

Note: I'm using Linux Kernel 2.2 + ipchains + CBQ
Not easy to setup due to the limitation of Kernel 2.2 and IPChains.
Will install a new Linux later to use iptables + l7-filter.

[Motherboard] GigaByte GA-965G-DS4

YiQi — Wed, 06 Dec 2006 21:34:52 +0800

Hi,

Wanna get one, do you have it?

Gigabyte GA-965G-DS4

Thanks!

Enterprise Hardisk & ICH7R/ICH8R Motherboard

YiQi — Sat, 25 Nov 2006 16:16:09 +0800

Enterprise Hardisk not easy to find in Lowyat, do you carry them?
Prefer SATA.

WD RE Series:
WD1600YS - 160GB
WD2500YS - 250GB
WD3200YS - 320GB

Seagate Barracuda ES Series:
ST3250820NS/ST3250620NS - 250GB
ST3320620NS/ST3320820NS - 320GB

Intend to buy 2 for setting up RAID.
Mainly for 24/7 Server.

BTW, any recommend Motherboard with ICH7R / ICH8R southbridge.
Don't mind using i945 / i955 / i965 / i975 northbridge.
As long as cheap enough around $500~$600
Prefer full/partial solid capacitors like Gigabyte GA-965P-DS4 or Abit AB9 Pro

Thanks!