Google loses data as lightning strikes

懷疑兮笑話!  

Source: http://www.bbc.com/news/technology-33989384

Google says data has been wiped from discs at one of its data centres in Belgium - after the local power grid was struck by lightning four times.

Some people have permanently lost access to the files on the affected disks as a result.

A number of disks damaged following the lightning strikes did, however, later became accessible.

Generally, data centres require more lightning protection than most other buildings.

Google has said that lightning did not actually strike the data centre itself, but the local power grid and the BBC understands that customers, through various backup technologies, were able to recover all lost data.

While four successive strikes might sound unlikely, lightning does not need to repeatedly strike the same place or the actual building to cause damage.

Justinin Gale, project manager for the lightning protection service Orion, said lightning could strike power or telecommunications cables connected to a building at a distance and still cause disruptions.

"The cabling alone can be struck anything up to a kilometre away, bring [the shock] back to the data centre and fuse everything that's in it," he said.

Unlucky Strike

The Google Compute Engine (GCE) service allows Google's clients to store data and run virtual computers in the cloud. It's not known which clients were affected, or what type of data was lost.

In an online statement, Google said that data on just 0.000001% of disk space was permanently affected.

"Although automatic auxiliary systems restored power quickly, and the storage systems are designed with battery backup, some recently written data was located on storage systems which were more susceptible to power failure from extended or repeated battery drain," it said.

The company added it would continue to upgrade hardware and improve its response procedures to make future losses less likely.

A spokesman for data centre consultants Future-Tech, commented that while data centres were designed to withstand lightning strikes via a network of conductive lightning rods, it was not impossible for strikes to get through.

"Everything in the data centre is connected one way or another," said James Wilman, engineering sales director. "If you get four large strikes it wouldn't surprise me that it has affected the facility."

Although the chances of data being wiped by lightning strikes are incredibly low, users do have the option of being able to back things up locally as a safety measure.

笑話?
1.香港d server都有斷電保護 個voltage唔會跟住供電方出事而大上大落 google冇可能買唔起
2.好後備柴油發電機不用嗎?
3.如果係mysql access 唔到某ser應該會redirect去其他ser,而data一直同步緊…
4.還有主機板的保護呢
抱歉我認真了

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如果唔講, 部份客人會懷疑供應商做法.

基本上, GOOGLE用自家配套搞一大堆, 只是要時間調動. 我曾經見過一個中學生實驗, 因為保安問題(部份供應商只負責基本保安),一筆資訊要打散最少六份, 如果找到其中四份就可以復原.

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笑話?
1.香港d server都有斷電保護 個voltage唔會跟住供電方出事而大上大落 google冇可能買唔起
2.好後備柴 ...
抱歉我認真了
louis3412 發表於 23/8/2015 12:39
如果唔講, 部份客人會懷疑供應商做法.
基本上, GOOGLE用自家配套搞一大堆, 只是要時間調動. 我曾經見過一 ...
polarhei 發表於 23/8/2015 12:47

如果做緊 sync 或 disk writes 嗰陣斷哂電... 又真兮無得救!

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笑話?
1.香港d server都有斷電保護 個voltage唔會跟住供電方出事而大上大落 google冇可能買唔起
2.好後備柴 ...
louis3412 發表於 2015-8-23 12:39


同步緊 <-- yes
未同步好就死, cache內data就咁bye bye
最多rollback去之前既backup/snapshot

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如果雷電而個電網又PROTECT唔好,係好易沖到入DataCenter打死電腦,因為到了DataCenter 門口才探測到,個反應時間唔足夠做PROTECT。
香港好少發生係因為係電網有幾重保護,如果沿頭有問題,電腦系統可以即時知道控制後段自動做PROJECT或斷開線路。

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唔覺係咩笑話

睇個情況出事既DATA就係同步緊既DATA
佢既斷電亦只係一瞬,但呢一瞬同步既DATA係死硬
唔覺有咩特別
佢都有機制去做復原,基本唔係咩好值得擔心既事
GOOGLE只係義務性做報告

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本帖最後由 良優 於 2016-1-27 15:49 編輯

刪除

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唔覺係咩笑話

睇個情況出事既DATA就係同步緊既DATA
佢既斷電亦只係一瞬,但呢一瞬同步既DATA係死硬
唔覺有 ...
tuyylihk 發表於 2015-8-24 09:01


回溯姐
可能又係標題黨 回溯只係CACHE消失左
loses data 好多人都以為係成份唔見左
回溯既影響往往比成份野消失細好多

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本帖最後由 B687 於 2015-8-24 17:30 編輯
如果雷電而個電網又PROTECT唔好,係好易沖到入DataCenter打死電腦,因為到了DataCenter 門口才探測到,個反 ...
evec 發表於 2015-8-23 23:37

中電時不時有voltage dip

data centre用on-line UPS
你估直入?

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