Heikki Linnakangas 4917f52c88 Server support for new pagestream protocol version (#7377) ...

In the old protocol version, the client sent with each request:

- latest: bool. If true, the client requested the latest page
  version, and the 'lsn' was just a hint of when the page was last
  modified
- lsn: Lsn, the page version to return

This protocol didn't allow requesting a page at a particular
non-latest LSN and *also* sending a hint on when the page was last
modified. That put a read only compute into an awkward position where
it had to either request each page at the replay-LSN, which could be
very close to the last LSN written in the primary and therefore
require the pageserver to wait for it to arrive, or an older LSN which
could already be garbage collected in the pageserver, resulting in an
error. The new protocol version fixes that by allowing a read only
compute to send both LSNs.

To use the new protocol version, use "pagestream_v2" command instead
of just "pagestream". The old protocol version is still supported, for
compatibility with old computes (and in fact there is no client
support yet, it is added by the next commit).

2024-04-25 20:45:37 +03:00

..

src

Server support for new pagestream protocol version (#7377)

2024-04-25 20:45:37 +03:00

Cargo.toml

Update most of the dependencies to their latest versions (#4026)

2023-04-14 18:28:54 +03:00