之前已看過舞台劇版本的《Mamma Mia!》，氣氛相當不錯，而電影版也很成功地將這個開心、充滿活力、青春的氣氛帶給觀眾。
一向覺得音樂劇，劇情還是其次，最重要是歌曲與情節的融合。這個融合在電影版會更難，因為我們看舞
Why ZFS's raidz design decision is sensible (or at least rational)
Given the downsides covered in yesterday's entry , ZFS's decision to stripe data blocks acrossall of the disks in a raidz probably sounds rather odd. However, itactually is a sensible decision given ZFS's overall design goals. Theeasiest way to see why is to contemplate the problems posed by analternate design.
Suppose that ZFS did not turn a single data block into a 'paritystripe', but instead had the idea of what I will call a 'block set',a group of
A read performance surprise with ZFS's raidz and raidz2
Sun's ZFS contains a performance surprise for people using its versionof RAID-5 and RAID-6, which ZFS calls raidz and raidz2. To understandwhat is going on, it is necessary to start with some basic ZFS ideas.
One of the things that ZFS is worried about is disk corruption . To deal with this, ZFS famously checksums everythingthat it writes (both filesystem metadata and file data) and thenverifies that checksum when you read the things back; specifically,ZFS computes and checks a
政治馬戲團
政治馬戲團
「只要有恆心，鐵柱磨成針」這種事，我Daisy是從來不信的。我只相信「人蠢無藥醫」。無論幾有恆心，蠢就是蠢。直至一個星期前我才知錯，原來只要恆心爆膨地不斷參選，終有一天可以像謝偉俊那樣得米。
接下來的
999 days is not forever
One of my peculiar perversions is that I want my browser's history ofvisited URLs to stick around forever (or at least to not expire in a acrude time-based way). Firefox doesn't have an option to do this, butit does have an expiry time in days in a field that only accepts threedigits, and back in the halcyon days of yore when I switched to Firefoxand set it up, 999 days seemed acceptably close to forever.
Recently, I noticed that
Fracture
"Your humerus bone at the right arm has broken, at the site called greater tuberosity."
I told my friend firmly, with an authoritative tone, when he called me for help after a fall around one year ago.
Months later, I still remember the moment when I was first shown his X-ray at the emergency room waiting hall. "Going to be nonoperative treatment and short period of shoulder immobilization," I advised. "Well, at most two weeks," I continued, almost whispering to
I told my friend firmly, with an authoritative tone, when he called me for help after a fall around one year ago.
Months later, I still remember the moment when I was first shown his X-ray at the emergency room waiting hall. "Going to be nonoperative treatment and short period of shoulder immobilization," I advised. "Well, at most two weeks," I continued, almost whispering to
一體兩面:《緬甸豎琴》與《野火》
評論《緬甸豎琴》 (The Burmese Harp, 1956) 的, 大多數因市川崑在影片裡頭不明確針對日本發動戰爭的「尷尬位」, 而認定他不敢面對歷史, 未免有欠公允. 當你看過《緬甸豎琴》和《野火》(Fires on the Plain, 1959)後, 會明白市
Blogger 與宣傳
記得在香港 Google Map 發佈會上，公關公司人員問我：「上幾次唔見你？」，我純綷說笑回答：「有飯食我就黎！」。但這可能也是很多公司在找 Blogger 宣傳時的疑問：向這班人宣傳有效果嗎？會不會是浪費時間？這也是我的疑問。
首先要
ZFS's helpful attention to detail
Because I just ran into this:
Imagine that you have a ZFS pool, call it tank to match the conventionof ZFS examples, and that it has three spare devices configured. Furtherimagine that you want to remove those three configured spares from thepool:
# zpool remove tank c4t0d0 c4t0d1 c4t0d2
(No error messages are emitted.)
Then, because you are a cautious person (or because you have a toolthat automatically saves your pool