最近在聽周杰倫的新碟《依然范特西》的歌,老實說其實跟他其他的專輯差不多,所有的歌曲都可以找到之前作品的影子。不過這並不緊要,我就是想聽周氏曲風,只此一家的東西。
聽慣了周杰倫,都知道咬字不清算是他的個人
IRON File Systems [PDF] is apaper from the 2005 ACM Symposium on Operating Systems Principles.To quote from the abstract:
Commodity file systems trust disks to either work or fail completely,yet modern disks exhibit more complex failure modes. We suggest a newfail-partial failure model for disks, which incorporates realisticlocalized faults such as latent sector errors and block corruption.We then develop and apply a novel failure-policy fingerprintingframework, to investigate how commodity file systems react to a rangeof more
If you boot a Disksuite-using Solaris 8 machine into single-user modeto do maintenance and do a metastat , you'll discover that all of yourmirrored metadevices are marked as needing to be metasync'd, even ifthey actually are fully consistent.
What seems to be going on is that Disksuite doesn't update thingsfrom the on-disk metadata state database when the kernel bringsup the metadevices themselves in early boot. Instead, it defers thisuntil you explicitly run ' metasync -r ',
I have been trying to spec out a new machine lately, which is remindingme all over again how I hate hardware. This time around, the target ofmy particular hate is AMD CPUs, especially the new AM2 ones, where theperformance picture has become so complicated that you need a largechart to understand it.
Choosing CPUs used to be simple: within a given CPU family, the onlything that changed performance was the clock speed, so you could justbuy the fastest CPU your budget and desires afforded
最近在聽周杰倫的新碟《依然范特西》的歌,老實說其實跟他其他的專輯差不多,所有的歌曲都可以找到之前作品的影子。不過這並不緊要,我就是想聽周氏曲風,只此一家的東西。
聽慣了周杰倫,都知道咬字不清算是他的個人
It's not uncommon to have people harsh on Python and similar languagesas being 'scripting languages', not suitable for serious jobs becausethey're not fast enough or they use too much memory, or the like. I haveto beg to differ, because I have a great counter-example.
We use a SMTP frontend daemon to check connections before we bother tostart a real SMTP conversation. This program does our greylisting, ourDNS blocklist checking, connection count limiting, and a number of otherchecks
Henry Spencer recently wrote some very useful words of advice on backupson a local sysadmin mailing list. They struck me as the sort of thingsthat are useful enough to share more widely, so with Henry's permissionI'm putting his message here. (I thought about running just part of hisemail, but the more I read it, the more I wanted people to see all ofit, so I'm just going to put up the whole thing.)
So, in Henry Spencer's
One of my small peculiarities is that I'm an old-fashioned CRT person.By now this is an unfortunate affliction since it's pretty clear thatLCDs are the future, whether or not I really like them. (If the pricesfor good CRTs haven't already bottomed out and started climbing due todecreased production, it probably won't be long.)
Part of the reason I haven't warmed to LCDs is that they have scary andvisible failure modes, like stuck pixels, that