| Commit message (Collapse) | Author | Age | Files | Lines |
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With --keep-actor, a node on a file whose last record is Closed writes on
as the actor the header names, which takes the file holding every change
of that actor. At a clean stop, the node's own workers go on writing
until it exits: its alive stamp in the member list, votes, a
coordinator's commit. One committed after Closed was appended, and sent
by the still-running sync, would be a change of that actor the file
lacks, and the next start would make another change with its number.
swarm::document_file::close now takes the document's write lock, marks
the file at the heads it sees there, and sets a fresh actor before
letting go: what the node writes after is no change of the marked actor.
A record the file worker appends after Closed (such a write, flushed)
leaves the file unmarked, which starts a fresh actor next time.
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actor
A node writes as a fresh Automerge actor at each start, so no change number of an actor
comes twice: one sent before a crash but not yet appended to the document file would
otherwise be made again, differently. An epoch thus gathers a writer per start, and
every transfer of its history carries a signature per writer.
The document file now says when it holds everything the node wrote:
* at a clean stop, after the last append, an empty `Closed` record, only where the
file is up to the document's heads (ready, not rejoining);
* as a node starts on the file, before anything is written, an empty `Opened` record,
so a crash from then on leaves a file without the mark;
* the header names the actor the node writes with (`current`).
With `--keep-actor` (off by default; needs `--document-file`), a node starting on a
file that ends with `Closed` writes on as that actor. A crash, a drop, a switch or a
rejoin still starts a fresh one, so an epoch's writers come to one per node plus one
per such event. lifecycle.md says so.
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A node's signatures are saved with its document (--document-file) and
loaded with it.
Auth plan M5.
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This allows a lot of operations to drop mut.
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