| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Stephen Frost <sfrost(at)snowman(dot)net> |
| Cc: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Masahiko Sawada <masahiko(dot)sawada(at)2ndquadrant(dot)com> |
| Subject: | Re: Key management with tests |
| Date: | 2021-01-14 00:49:47 |
| Message-ID: | 20210114004947.GA15178@momjian.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Tue, Jan 12, 2021 at 01:46:53PM -0500, Bruce Momjian wrote:
> On Tue, Jan 12, 2021 at 01:15:44PM -0500, Bruce Momjian wrote:
> > Well, we have eight unused bits in the IV, so we could just increment
> > that for every hint bit change that uses the same LSN, and then force a
> > dummy WAL record when that 8-bit counter overflows --- that seems
> > simpler than logging hint bits.
>
> Sorry, I was incorrect. The IV is 16 bytes, made up of the LSN (8
> bytes), and the page number (4 bytes). That leaves 4 bytes unused or
> 2^32 values for hint bit changes before we have to generate a dummy LSN
> record.
I just did a massive update to the Transparent Data Encryption wiki page
to make it more readable and updated it with current decisions:
https://wiki.postgresql.org/wiki/Transparent_Data_Encryption
--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EnterpriseDB https://enterprisedb.com
The usefulness of a cup is in its emptiness, Bruce Lee
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Kyotaro Horiguchi | 2021-01-14 01:10:22 | Re: A failure of standby to follow timeline switch |
| Previous Message | tsunakawa.takay@fujitsu.com | 2021-01-14 00:27:16 | RE: Disable WAL logging to speed up data loading |