Re: Initdb --data-checksums by default

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^-15   on 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