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One of the reasons good alerting is tough

Wandering Thoughts | June 13, 2009, 1:18 a.m. | Original

One of the reasons that alerting is a tough problem to solve well iswhat I'll call the dependency problem. It goes like this: imagine thatyou have a nice monitoring system and it's keeping track of all sortsof things in your environment. One day you get a huge string of alerts,reporting that server after server is down. Oh, and also a networkswitch isn't responding.

Of course, the real problem is that the switch has died. It's beingcamouflaged behind

反饋期間

tswtsw | June 12, 2009, 2:52 p.m. | Original

1. 動力和反動力。這些病是開始六月暴走後完全沒遇上的：背痛、常常直不起腰來，腳患復發，以及單純的累，禁不住要馬上蓋起眼皮那種。現在都來了。然而這個時候才最重要，要累積，要用思索把所做的行為編織入我們的

雷朋三世主題曲

agnesvaria | June 12, 2009, 11:03 a.m. | Original

幾乎沒有看過《雷朋三世》(Lupin the Third) . 是小時候媽媽朋友的小兒子愛看《雷朋三世》, 經常租錄影帶欣賞. 依稀記得那是劇場版《カリオストロの城》, 雷朋三世追著偷了印鈔票版的(緊身衣、電單車─小朋友唔識野都知道「

What I know about Solaris 10 NFS server file lock limits

Wandering Thoughts | June 12, 2009, 1:18 a.m. | Original

Suppose that you have a Solaris fileserver and a bunch of NFS clients(in this case they're Linux machines, but I don't think it matters).Perhaps one or two of them are Samba servers. Further suppose that yourclient machines start reporting things like ' fcntl() failed: No locksavailable '. What is limiting you, and what do you do about it?

(We'll assume that you use tools like lslk to rule out some process ona client machine holding on to

入寶山而空手回 – 未來戰士 2018

JackysBlog | June 11, 2009, 1:33 p.m. | Original

Terminator Salvation

《未來戰士》系列重新上路，已經不可能再用舊有故事模式，所以這次是新的三步曲，時間背景是人機混戰的未來，帶我們真正經歷 Skynet 的天羅地網下，人類掙扎求存的實況。然而不知是否基於先天的限制，故事卻以乎玩不出甚麼

病好了,但未復原

silencemo | June 11, 2009, 10:05 a.m. | Original

病了兩天
都在吃藥
總以為自己會被隔離
故意去醫院看醫生他們都沒有什麼表示
現在豬流感人心惶惶
我搞了兩天人流感也變得死氣沉沉
即使吃完了藥流感而已去
還是感到有點虛浮且不知所措

病中有一晚徹夜失眠
在tvb星河頻道看到黃

There are two different purposes of monitoring systems

Wandering Thoughts | June 11, 2009, 1:18 a.m. | Original

It's worth saying this explicitly: monitoring systems have two differentpurposes, one of which is sort of a subset of the other (but notnecessarily).

The first purpose of monitoring, and what many people initially installa system for, is alerting, letting you when there are problems. Thesecond purpose of monitoring is tracking, gathering ongoing data forhistorical analysis; this is part of the vital work of gettingstatistics . Put this way, it's clear that these twooverlap (sometimes badly )