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Feb
11
awarded  Caucus
Jul
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Jun
25
comment Why is 12.04 removing the -server kernel flavour?
The I/O scheduler does indeed make a difference especially for virtualization workloads. Take a look here: publib.boulder.ibm.com/infocenter/lnxinfo/v3r0m0/topic/liaat/…, it concludes "overall, the figure shows that the Deadline I/O scheduler outperforms the CFQ I/O scheduler, especially in multi-threaded scenarios".
Jun
25
comment MDADM Superblock Recovery
-1 for the "unrecoverable bit error rate" hysteria. All of the articles I've seen on this topic were misinterpreting the manufacturer's numbers as "errors per bits read" whereas they are "errors per sectors read" - which makes a differentiating factor of 2^17 or more than 10^3, making it roughly 1500 exabytes. The common sense should have taught anybody spreading this rumor that with a substantial number of RAID5 arrays are running with drives >> 2 TB nowadays, the word would already have been around much faster than with theoretical calculations based on wrong assumptions.
Jun
25
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Jun
25
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Jun
25
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Apr
16
answered Why is 12.04 removing the -server kernel flavour?