# Eventstore fixes
- `event.Position` used float64 before which can lead to [precision
loss](https://github.com/golang/go/issues/47300). The type got replaced
by [a type without precision
loss](https://github.com/jackc/pgx-shopspring-decimal)
- the handler reported the wrong error if the current state was updated
and therefore took longer to retry failed events.
# Mirror fixes
- max age of auth requests can be configured to speed up copying data
from `auth.auth_requests` table. Auth requests last updated before the
set age will be ignored. Default is 1 month
- notification projections are skipped because notifications should be
sent by the source system. The projections are set to the latest
position
- ensure that mirror can be executed multiple times
---------
Co-authored-by: Livio Spring <livio.a@gmail.com>
# Which Problems Are Solved
The `auth.auth_requests` table is not cleaned up so long running Zitadel
installations can contain many rows.
The mirror command can take long because a the data are first copied
into memory (or disk) on cockroach and users do not get any output from
mirror. This is unfortunate because people don't know if Zitadel got
stuck.
# How the Problems Are Solved
Enhance logging throughout the projection processes and introduce a
configuration option for the maximum age of authentication requests.
# Additional Changes
None
# Additional Context
closes https://github.com/zitadel/zitadel/issues/9764
---------
Co-authored-by: Livio Spring <livio.a@gmail.com>
# Which Problems Are Solved
Zitadel currently uses 3 database pool, 1 for queries, 1 for pushing
events and 1 for scheduled projection updates. This defeats the purpose
of a connection pool which already handles multiple connections.
During load tests we found that the current structure of connection
pools consumes a lot of database resources. The resource usage dropped
after we reduced the amount of database pools to 1 because existing
connections can be used more efficiently.
# How the Problems Are Solved
Removed logic to handle multiple connection pools and use a single one.
# Additional Changes
none
# Additional Context
part of https://github.com/zitadel/zitadel/issues/8352
# Which Problems Are Solved
Float64 which was used for the event.Position field is [not precise in
go and gets rounded](https://github.com/golang/go/issues/47300). This
can lead to unprecies position tracking of events and therefore
projections especially on cockcoachdb as the position used there is a
big number.
example of a unprecies position:
exact: 1725257931223002628
float64: 1725257931223002624.000000
# How the Problems Are Solved
The float64 was replaced by
[github.com/jackc/pgx-shopspring-decimal](https://github.com/jackc/pgx-shopspring-decimal).
# Additional Changes
Correct behaviour of makefile for load tests.
Rename `latestSequence`-queries to `latestPosition`
# Which Problems Are Solved
The mirror command used the wrong position to filter for events if
different database technologies for source and destination were used.
# How the Problems Are Solved
The statements which diverge are stored on the client so that different
technologies can use different statements.
# Additional Context
- https://discord.com/channels/927474939156643850/1256396896243552347
# Which Problems Are Solved
Adds the possibility to mirror an existing database to a new one.
For that a new command was added `zitadel mirror`. Including it's
subcommands for a more fine grained mirror of the data.
Sub commands:
* `zitadel mirror eventstore`: copies only events and their unique
constraints
* `zitadel mirror system`: mirrors the data of the `system`-schema
* `zitadel mirror projections`: runs all projections
* `zitadel mirror auth`: copies auth requests
* `zitadel mirror verify`: counts the amount of rows in the source and
destination database and prints the diff.
The command requires one of the following flags:
* `--system`: copies all instances of the system
* `--instance <instance-id>`, `--instance <comma separated list of
instance ids>`: copies only the defined instances
The command is save to execute multiple times by adding the
`--replace`-flag. This replaces currently existing data except of the
`events`-table
# Additional Changes
A `--for-mirror`-flag was added to `zitadel setup` to prepare the new
database. The flag skips the creation of the first instances and initial
run of projections.
It is now possible to skip the creation of the first instance during
setup by setting `FirstInstance.Skip` to true in the steps
configuration.
# Additional info
It is currently not possible to merge multiple databases. See
https://github.com/zitadel/zitadel/issues/7964 for more details.
It is currently not possible to use files. See
https://github.com/zitadel/zitadel/issues/7966 for more information.
closes https://github.com/zitadel/zitadel/issues/7586
closes https://github.com/zitadel/zitadel/issues/7486
### Definition of Ready
- [x] I am happy with the code
- [x] Short description of the feature/issue is added in the pr
description
- [x] PR is linked to the corresponding user story
- [x] Acceptance criteria are met
- [x] All open todos and follow ups are defined in a new ticket and
justified
- [x] Deviations from the acceptance criteria and design are agreed with
the PO and documented.
- [x] No debug or dead code
- [x] My code has no repetitions
- [x] Critical parts are tested automatically
- [ ] Where possible E2E tests are implemented
- [x] Documentation/examples are up-to-date
- [x] All non-functional requirements are met
- [x] Functionality of the acceptance criteria is checked manually on
the dev system.
---------
Co-authored-by: Livio Spring <livio.a@gmail.com>
