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Finish sync algorithm in theory

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This commit is contained in:
Vitaliy Filippov
2019-11-10 12:52:37 +03:00
parent 24f5d71595
commit ae56fe1067
4 changed files with 109 additions and 63 deletions
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blockstore_write.cpp
+25 -13
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@@ -29,6 +29,7 @@ int blockstore::dequeue_write(blockstore_operation *op)
);
op->pending_ops = 1;
op->min_used_journal_sector = op->max_used_journal_sector = 0;
in_progress_ops.insert(op);
}
else
{
@@ -110,6 +111,7 @@ int blockstore::dequeue_write(blockstore_operation *op)
journal.sector_info[journal.cur_sector].usage_count++;
op->pending_ops = 2;
op->min_used_journal_sector = op->max_used_journal_sector = 1 + journal.cur_sector;
in_progress_ops.insert(op);
}
return 1;
}
@@ -123,29 +125,39 @@ void blockstore::handle_write_event(ring_data_t *data, blockstore_operation *op)
throw new std::runtime_error("write operation failed. in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111");
}
op->pending_ops--;
if (op->min_used_journal_sector > 0)
{
for (uint64_t s = op->min_used_journal_sector; s <= op->max_used_journal_sector; s++)
{
journal.sector_info[s-1].usage_count--;
}
op->min_used_journal_sector = op->max_used_journal_sector = 0;
}
if (op->pending_ops == 0)
{
// Acknowledge write without sync
// Release used journal sectors
if (op->min_used_journal_sector > 0)
{
for (uint64_t s = op->min_used_journal_sector; s <= op->max_used_journal_sector; s++)
{
journal.sector_info[s-1].usage_count--;
}
op->min_used_journal_sector = op->max_used_journal_sector = 0;
}
// Switch object state
auto dirty_it = dirty_db.find((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
dirty_it->second.state = (dirty_it->second.state == ST_J_SUBMITTED
? ST_J_WRITTEN : (dirty_it->second.state == ST_DEL_SUBMITTED ? ST_DEL_WRITTEN : ST_D_WRITTEN));
// Acknowledge write without sync
op->retval = op->len;
op->callback(op);
in_progress_ops.erase(op);
unsynced_writes.push_back((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
// Remember write as unsynced
if (IS_BIG_WRITE(dirty_it->second.state))
{
unsynced_big_writes.push_back((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
}
else
{
unsynced_small_writes++;
}
}
}