On Wed, Jun 11, 2014 at 4:19 PM, Fujii Masao <masao.fu...@gmail.com> wrote:

> IIUC even when we adopt only one algorithm, additional at least one bit is
> necessary to see whether this backup block is compressed or not.
> This flag is necessary only for backup block, so there is no need to use
> the header of each WAL record. What about just using the backup block
> header?
+1. We can also steal a few bits from ForkNumber field in the backup block
header if required.


Pavan Deolasee

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