- get_missing_time_partition_ranges: Gets the ranges of missing partitions for the given table, interval and range unless any existing partition conflicts with calculated missing ranges.
- create_time_partitions: Creates partitions by getting range values from get_missing_time_partition_ranges.
- drop_old_time_partitions: Drops partitions of the table older than given threshold.
Relevant PG commit:
9e38c2bb5093ceb0c04d6315ccd8975bd17add66
fix array_cat_agg for pg upgrades
array_cat_agg now needs to take anycompatiblearray instead of anyarray
because array_cat changed its type from anyarray to anycompatiblearray
with pg14.
To handle upgrades correctly, we drop the aggregate in
citus_pg_prepare_upgrade. To be able to drop it, we first remove the
dependency from pg_depend.
Then we create the right aggregate in citus_finish_pg_upgrade and we
also add the dependency back to pg_depend.
update_distributed_table_colocation can be called by the relation
owner, and internally it updates pg_dist_partition. With this
commit, update_distributed_table_colocation uses an internal
UDF to access pg_dist_partition.
As a result, this operation can now be done by regular users
on MX.
* Add parameter to cleanup metadata
* Set clear metadata default to true
* Add test for clearing metadata
* Separate test file for start/stop metadata syncing
* Fix stop_sync bug for secondary nodes
* Use PreventInTransactionBlock
* DRemovedebuggiing logs
* Remove relation not found logs from mx test
* Revert localGroupId when doing stop_sync
* Move metadata sync test to mx schedule
* Add test with name that needs to be quoted
* Add test for views and matviews
* Add test for distributed table with custom type
* Add comments to test
* Add test with stats, indexes and constraints
* Fix matview test
* Add test for dropped column
* Add notice messages to stop_metadata_sync
* Add coordinator check to stop metadat sync
* Revert local_group_id only if clearMetadata is true
* Add a final check to see the metadata is sane
* Remove the drop verbosity in test
* Remove table description tests from sync test
* Add stop sync to coordinator test
* Change the order in stop_sync
* Add test for hybrid (columnar+heap) partitioned table
* Change error to notice for stop sync to coordinator
* Sync at the end of the test to prevent any failures
* Add test case in a transaction block
* Remove relation not found tests
Sometimes the background daemon doesn't cleanup orphaned shards quickly
enough. It's useful to have a UDF to trigger this removal when needed.
We already had a UDF like this but it was only used during testing. This
exposes that UDF to users. As a safety measure it cannot be run in a
transaction, because that would cause the background daemon to stop
cleaning up shards while this transaction is running.
Without this change the rebalancer progress monitor gets the shard sizes
from the `shardlength` column in `pg_dist_placement`. This column needs to
be updated manually by calling `citus_update_table_statistics`.
However, `citus_update_table_statistics` could lead to distributed
deadlocks while database traffic is on-going (see #4752).
To work around this we don't use `shardlength` column anymore. Instead
for every rebalance we now fetch all shard sizes on the fly.
Two additional things this does are:
1. It adds tests for the rebalance progress function.
2. If a shard move cannot be done because a source or target node is
unreachable, then we error in stop the rebalance, instead of showing
a warning and continuing. When using the by_disk_size rebalance
strategy it's not safe to continue with other moves if a specific
move failed. It's possible that the failed move made space for the
next move, and because the failed move never happened this space now
does not exist.
3. Adds two new columns to the result of `get_rebalancer_progress` which
shows the size of the shard on the source and target node.
Fixes#4930
We often change result types of functions slightly. Our downgrade tests
wouldn't notice these changes. This change adds them to the description
of these items.
An example of an SQL change that isn't caught without this change and is
caught with the get_rebalance_progress change in this PR:
https://github.com/citusdata/citus/pull/4963
Every move in the rebalancer algorithm results in an improvement in the
balance. However, even if the improvement in the balance was very small
the move was still chosen. This is especially problematic if the shard
itself is very big and the move will take a long time.
This changes the rebalancer algorithm to take the relative size of the
balance improvement into account when choosing moves. By default a move
will not be chosen if it improves the balance by less than half of the
size of the shard. An extra argument is added to the rebalancer
functions so that the user can decide to lower the default threshold if
the ignored move is wanted anyway.
* When moving a shard to a new node ensure there is enough space
* Add WairForMiliseconds time utility
* Add more tests and increase readability
* Remove the retry loop and use a single udf for disk stats
* Address review
* address review
Co-authored-by: Jelte Fennema <github-tech@jeltef.nl>
* Introduce 3 partitioned size udfs
* Add tests for new partition size udfs
* Fix type incompatibilities
* Convert UDFs into pure sql functions
* Fix function comment
With citus shard helper view, we can easily see:
- where each shard is, which node, which port
- what kind of table it belongs to
- its size
With such a view, we can see shards that have a size bigger than some
value, which could be useful. Also debugging can be easier in production
as well with this view.
Fetch shards in one go per node
The previous implementation was slow because it would do a lot of round
trips, one per shard to be exact. Hence it is improved so that we fetch
all the shard_name, shard-size pairs per node in one go.
Construct shards_names, sizes query on coordinator
* Replace master_add_node with citus_add_node
* Replace master_activate_node with citus_activate_node
* Replace master_add_inactive_node with citus_add_inactive_node
* Use master udfs in old scripts
* Replace master_add_secondary_node with citus_add_secondary_node
* Replace master_disable_node with citus_disable_node
* Replace master_drain_node with citus_drain_node
* Replace master_remove_node with citus_remove_node
* Replace master_set_node_property with citus_set_node_property
* Replace master_unmark_object_distributed with citus_unmark_object_distributed
* Replace master_update_node with citus_update_node
* Replace master_update_shard_statistics with citus_update_shard_statistics
* Replace master_update_table_statistics with citus_update_table_statistics
* Rename master_conninfo_cache_invalidate to citus_conninfo_cache_invalidate
Rename master_dist_local_group_cache_invalidate to citus_dist_local_group_cache_invalidate
* Replace master_copy_shard_placement with citus_copy_shard_placement
* Replace master_move_shard_placement with citus_move_shard_placement
* Rename master_dist_node_cache_invalidate to citus_dist_node_cache_invalidate
* Rename master_dist_object_cache_invalidate to citus_dist_object_cache_invalidate
* Rename master_dist_partition_cache_invalidate to citus_dist_partition_cache_invalidate
* Rename master_dist_placement_cache_invalidate to citus_dist_placement_cache_invalidate
* Rename master_dist_shard_cache_invalidate to citus_dist_shard_cache_invalidate
* Drop master_modify_multiple_shards
* Rename master_drop_all_shards to citus_drop_all_shards
* Drop master_create_distributed_table
* Drop master_create_worker_shards
* Revert old function definitions
* Add missing revoke statement for citus_disable_node
Columnar options were by accident linked to the relfilenode instead of the regclass/relation oid. This PR moves everything related to columnar options to their own catalog table.
As the previous versions of Citus don't know how to handle citus local
tables, we should prevent downgrading from 9.5 to older versions if any
citus local tables exists.
* use adaptive executor even if task-tracker is set
* Update check-multi-mx tests for adaptive executor
Basically repartition joins are enabled where necessary. For parallel
tests max adaptive executor pool size is decresed to 2, otherwise we
would get too many clients error.
* Update limit_intermediate_size test
It seems that when we use adaptive executor instead of task tracker, we
exceed the intermediate result size less in the test. Therefore updated
the tests accordingly.
* Update multi_router_planner
It seems that there is one problem with multi_router_planner when we use
adaptive executor, we should fix the following error:
+ERROR: relation "authors_range_840010" does not exist
+CONTEXT: while executing command on localhost:57637
* update repartition join tests for check-multi
* update isolation tests for repartitioning
* Error out if shard_replication_factor > 1 with repartitioning
As we are removing the task tracker, we cannot switch to it if
shard_replication_factor > 1. In that case, we simply error out.
* Remove MULTI_EXECUTOR_TASK_TRACKER
* Remove multi_task_tracker_executor
Some utility methods are moved to task_execution_utils.c.
* Remove task tracker protocol methods
* Remove task_tracker.c methods
* remove unused methods from multi_server_executor
* fix style
* remove task tracker specific tests from worker_schedule
* comment out task tracker udf calls in tests
We were using task tracker udfs to test permissions in
multi_multiuser.sql. We should find some other way to test them, then we
should remove the commented out task tracker calls.
* remove task tracker test from follower schedule
* remove task tracker tests from multi mx schedule
* Remove task-tracker specific functions from worker functions
* remove multi task tracker extra schedule
* Remove unused methods from multi physical planner
* remove task_executor_type related things in tests
* remove LoadTuplesIntoTupleStore
* Do initial cleanup for repartition leftovers
During startup, task tracker would call TrackerCleanupJobDirectories and
TrackerCleanupJobSchemas to clean up leftover directories and job
schemas. With adaptive executor, while doing repartitions it is possible
to leak these things as well. We don't retry cleanups, so it is possible
to have leftover in case of errors.
TrackerCleanupJobDirectories is renamed as
RepartitionCleanupJobDirectories since it is repartition specific now,
however TrackerCleanupJobSchemas cannot be used currently because it is
task tracker specific. The thing is that this function is a no-op
currently.
We should add cleaning up intermediate schemas to DoInitialCleanup
method when that problem is solved(We might want to solve it in this PR
as well)
* Revert "remove task tracker tests from multi mx schedule"
This reverts commit 03ecc0a681.
* update multi mx repartition parallel tests
* not error with task_tracker_conninfo_cache_invalidate
* not run 4 repartition queries in parallel
It seems that when we run 4 repartition queries in parallel we get too
many clients error on CI even though we don't get it locally. Our guess
is that, it is because we open/close many connections without doing some
work and postgres has some delay to close the connections. Hence even
though connections are removed from the pg_stat_activity, they might
still not be closed. If the above assumption is correct, it is unlikely
for it to happen in practice because:
- There is some network latency in clusters, so this leaves some times
for connections to be able to close
- Repartition joins return some data and that also leaves some time for
connections to be fully closed.
As we don't get this error in our local, we currently assume that it is
not a bug. Ideally this wouldn't happen when we get rid of the
task-tracker repartition methods because they don't do any pruning and
might be opening more connections than necessary.
If this still gives us "too many clients" error, we can try to increase
the max_connections in our test suite(which is 100 by default).
Also there are different places where this error is given in postgres,
but adding some backtrace it seems that we get this from
ProcessStartupPacket. The backtraces can be found in this link:
https://circleci.com/gh/citusdata/citus/138702
* Set distributePlan->relationIdList when it is needed
It seems that we were setting the distributedPlan->relationIdList after
JobExecutorType is called, which would choose task-tracker if
replication factor > 1 and there is a repartition query. However, it
uses relationIdList to decide if the query has a repartition query, and
since it was not set yet, it would always think it is not a repartition
query and would choose adaptive executor when it should choose
task-tracker.
* use adaptive executor even with shard_replication_factor > 1
It seems that we were already using adaptive executor when
replication_factor > 1. So this commit removes the check.
* remove multi_resowner.c and deprecate some settings
* remove TaskExecution related leftovers
* change deprecated API error message
* not recursively plan single relatition repartition subquery
* recursively plan single relation repartition subquery
* test depreceated task tracker functions
* fix overlapping shard intervals in range-distributed test
* fix error message for citus_metadata_container
* drop task-tracker deprecated functions
* put the implemantation back to worker_cleanup_job_schema_cachesince citus cloud uses it
* drop some functions, add downgrade script
Some deprecated functions are dropped.
Downgrade script is added.
Some gucs are deprecated.
A new guc for repartition joins bucket size is added.
* order by a test to fix flappiness
DESCRIPTION: Alter role only works for citus managed roles
Alter role was implemented before we implemented good role management that hooks into the object propagation framework. This is a refactor of all alter role commands that have been implemented to
- be on by default
- only work for supported roles
- make the citus extension owner a supported role
Instead of distributing the alter role commands for roles at the beginning of the node activation role it now _only_ executes the alter role commands for all users in all databases and in the current database.
In preparation of full role support small refactors have been done in the deparser.
Earlier tests targeting other roles than the citus extension owner have been either slightly changed or removed to be put back where we have full role support.
Fixes#2549
- Stop the daemon when citus extension is dropped
- Bail on maintenance daemon startup if myDbData is started with a non-zero pid
- Stop maintenance daemon from spawning itself
- Don't use postgres die, just wrap proc_exit(0)
- Assert(myDbData->workerPid == MyProcPid)
The two issues were that multiple daemons could be running for a database,
or that a daemon would be leftover after DROP EXTENSION citus
DESCRIPTION: Propagate ALTER FUNCTION statements for distributed functions
Using the implemented deparser for function statements to propagate changes to both functions and procedures that are previously distributed.
@thanodnl told me it was a bit of a problem that it's impossible to see
the history of a UDF in git. The only way to do so is by reading all the
sql migration files from new to old. Another problem is that it's also
hard to review the changed UDF during code review, because to find out
what changed you have to do the same. I thought of a IMHO better (but
not perfect) way to handle this.
We keep the definition of a UDF in sql/udfs/{name_of_udf}/latest.sql.
That file we change whenever we need to make a change to the the UDF. On
top of that you also make a snapshot of the file in
sql/udfs/{name_of_udf}/{migration-version}.sql (e.g. 9.0-1.sql) by
copying the contents. This way you can easily view what the actual
changes were by looking at the latest.sql file.
There's still the question on how to use these files then. Sadly
postgres doesn't allow inclusion of other sql files in the migration sql
file (it does in psql using \i). So instead I used the C preprocessor+
make to compile a sql/xxx.sql to a build/sql/xxx.sql file. This final
build/sql/xxx.sql file has every occurence of #include "somefile.sql" in
sql/xxx.sql replaced by the contents of somefile.sql.
DESCRIPTION: Refactor ensure schema exists to dependency exists
Historically we only supported schema's as table dependencies to be created on the workers before a table gets distributed. This PR puts infrastructure in place to walk pg_depend to figure out which dependencies to create on the workers. Currently only schema's are supported as objects to create before creating a table.
We also keep track of dependencies that have been created in the cluster. When we add a new node to the cluster we use this catalog to know which objects need to be created on the worker.
Side effect of knowing which objects are already distributed is that we don't have debug messages anymore when creating schema's that are already created on the workers.
DESCRIPTION: Add functions to help with postgres upgrades
Currently there is [a list of manual steps](https://docs.citusdata.com/en/v8.2/admin_guide/upgrading_citus.html?highlight=upgrade#upgrading-postgresql-version-from-10-to-11) to perform during a postgres upgrade. These steps guarantee our catalog tables are kept and counter values are maintained across upgrades.
Having more than 1 command in our docs for users to manually execute during upgrades is error prone for both the user, and our docs. There are already 2 catalog tables that have been introduced to citus that have not been added to our docs for backing up during upgrades (`pg_authinfo` and `pg_dist_poolinfo`).
As we add more functionality to citus we run into situations where there are more steps required either before or after the upgrade. At the same time, when we move catalog tables to a place where the contents will be maintained automatically during upgrades we could have less steps in our docs. This will come to a hard to maintain matrix of citus versions and steps to be performed.
Instead we could take ownership of these steps within the extension itself. This PR introduces two new functions for the user to use instead of long lists of error prone instructions to follow.
- `citus_prepare_pg_upgrade`
This function should be called by the user right before shutting down the cluster. This will ensure all citus catalog tables are backed up in a location where the information will be retained during an upgrade.
- `citus_finish_pg_upgrade`
This function should be called right after a pg_upgrade of the cluster. This will restore the catalog tables to the state before the upgrade happend.
Both functions need to be executed both on the coordinator and on all the workers, in the same fashion our current documentation instructs to do.
There are two known problems with this function in its current form, which is also a problem with our docs. We should schedule time in the future to improve on this, but having it automated now is better as we are about to add extra steps to take after upgrades.
- When you install citus in a clean cluster we do enable ssl for communication between the coordinator and the workers. If an upgrade to a clean cluster is performed we do not setup ssl on the new cluster causing the communication to fail.
- There are no automated tests added in this PR to execute an upgrade test durning every build.
Our current test infrastructure does not allow for 2 versions of postgres to exist in the same environment. We will need to invest time to create a new testing harness that could run the following scenario:
1. Create cluster
2. Run extensible scripts to execute arbitrary statements on this cluster
3. Perform an upgrade by preparing, upgrading and finishing
4. Run extensible scripts to verify all objects created by earlier scripts exists in correct form in the upgraded cluster
Given the non trivial amount of work involved for such a suite I'd like to land this before we have
automated testing.
On a side note; As the reviewer noticed, the tables created in the public namespace are not visible in `psql` with `\d`. The backup catalog tables have the same name as the tables in `pg_catalog`. Due to postgres internals `pg_catalog` is first in the search path and therefore the non-qualified name would alwasy resolve to `pg_catalog.pg_dist_*`. Internally this is called a non-visible table as it would resolve to a different table without a qualified name. Only visible tables are shown with `\d`.
Burak Velioglu
Sait Talha Nisanci
Halil Ozan Akgul
Naisila Puka
naisila
Onder Kalaci
Jelte Fennema
Hanefi Onaldi
Marco Slot
Ahmet Gedemenli
Onur Tirtir
Hadi Moshayedi
Jeff Davis
Hadi Moshayedi
Nils Dijk
Philip Dubé
Hanefi Onaldi