On 20.04.2016 10:47, John R Pierce wrote:
On 4/20/2016 12:43 AM, Alex Ignatov wrote:
Today in Big Data epoch silent data corruption becoming more and more
issue to afraid of. With uncorrectable read error rate ~ 10^-15on
multiterabyte disk bit rot is the real issue.
are not those uncorrectable errors detected by the disk hardware ?
thats not 'silent'.
whats the rate of uncorrectable AND undetected read errors ?
--
john r pierce, recycling bits in santa cruz
Uncorrectable read error rate ~ 10^-15- 10^-14. This error stays
undetected and uncorrectable.
Also how can you associate disk block ->> file block without knowing
fs structure? Also not every hardware include this checksum feature
under the hood.
--
Alex Ignatov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
