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cherry pick pingcap#2437 to release-3.0
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,68 @@ | ||
| --- | ||
| title: TiDB 3.1 Beta.2 Release Notes | ||
| category: Releases | ||
| --- | ||
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| # TiDB 3.1 Beta.2 Release Notes | ||
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| Release date: March 9, 2020 | ||
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| TiDB version: 3.1.0-beta.2 | ||
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| TiDB Ansible version: 3.1.0-beta.2 | ||
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| > **Warning:** | ||
| > | ||
| > Some known issues are found in this version, and these issues are fixed in new versions. It is recommended that you use the latest 3.1.x version. | ||
| ## Compatibility Changes | ||
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| + Tools | ||
| - TiDB Lightning | ||
| - Use the default configurations specified in the [TiDB Lightning Configuration](/reference/tools/tidb-lightning/config.md) for certain items not configured in the configuration file [#255](https://github.com/pingcap/tidb-lightning/pull/255) | ||
| - Add the `--tidb-password` CLI parameter to set the TiDB password [#253](https://github.com/pingcap/tidb-lightning/pull/253) | ||
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| ## New Features | ||
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| + TiDB | ||
| - Support adding the `AutoRandom` keyword in the column attribute to enable TiDB to automatically assign random integers to the primary key, which avoids the write hot spot caused by the `AUTO_INCREMENT` primary key [#14555](https://github.com/pingcap/tidb/pull/14555) | ||
| - Support creating or deleting column store replicas through DDL statements [#14537](https://github.com/pingcap/tidb/pull/14537) | ||
| - Add the feature that the optimizer can independently select different storage engines [#14537](https://github.com/pingcap/tidb/pull/14537) | ||
| - Add the feature that the SQL hint supports different storage engines [#14537](https://github.com/pingcap/tidb/pull/14537) | ||
| - Support reading data from followers by using the `tidb_replica_read` system variable [#13464](https://github.com/pingcap/tidb/pull/13464) | ||
| + TiKV | ||
| - Raftstore | ||
| - Add the `peer_address` parameter to connect other nodes to the TiKV server [#6491](https://github.com/tikv/tikv/pull/6491) | ||
| - Add the `read_index` and `read_index_resp` monitoring metrics to monitor the number of `ReadIndex` requests [#6610](https://github.com/tikv/tikv/pull/6610) | ||
| + PD Client | ||
| - Support reporting statistics of local threads to PD [#6605](https://github.com/tikv/tikv/pull/6605) | ||
| + Backup | ||
| - Replace the `RocksIOLimiter` flow control library with Rust’s `async-speed-limit` flow control library to eliminate extra memory copies when backing up a file [#6462](https://github.com/tikv/tikv/pull/6462) | ||
| + PD | ||
| - Tolerate backslash in the location label name [#2084](https://github.com/pingcap/pd/pull/2084) | ||
| + TiFlash | ||
| - Initial release | ||
| + TiDB Ansible | ||
| - Support deploying multiple Grafana/Prometheus/Alertmanager in one cluster [#1143](https://github.com/pingcap/tidb-ansible/pull/1143) | ||
| - Support deploying the TiFlash component [#1148](https://github.com/pingcap/tidb-ansible/pull/1148) | ||
| - Add monitoring metrics related to the TiFlash component [#1152](https://github.com/pingcap/tidb-ansible/pull/1152) | ||
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| ## Bug Fixes | ||
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| + TiKV | ||
| - Raftstore | ||
| - Fix the issue that the read requests cannot be processed because data is not properly read from Hibernate Regions [#6450](https://github.com/tikv/tikv/pull/6450) | ||
| - Fix the panic issue caused by the `ReadIndex` requests during the leader transfer process [#6613](https://github.com/tikv/tikv/pull/6613) | ||
| - Fix the issue that Hibernate Regions are not correctly awakened in some special conditions [#6730](https://github.com/tikv/tikv/pull/6730) [#6737](https://github.com/tikv/tikv/pull/6737) [#6972](https://github.com/tikv/tikv/pull/6972) | ||
| - Backup | ||
| - Fix the inconsistent data index during the restoration caused by the backup of the extra data [#6659](https://github.com/tikv/tikv/pull/6659) | ||
| - Fix the panic caused by incorrectly processing the deleted values during the backup [#6726](https://github.com/tikv/tikv/pull/6726) | ||
| + PD | ||
| - Fix the panic occurred because the rule checker fails to assign stores to Regions [#2161](https://github.com/pingcap/pd/pull/2161) | ||
| + Tools | ||
| - TiDB Lightning | ||
| - Fix the bug that the web interface does not work outside the Server mode [#259](https://github.com/pingcap/tidb-lightning/pull/259) | ||
| - BR (Backup and Restore) | ||
| - Fix the issue that BR cannot exit in time due to an unrecoverable error it encounters when restoring data [#152](https://github.com/pingcap/br/pull/152) | ||
| + TiDB Ansible | ||
| - Fix the issue that the rolling update command fails because the PD Leader cannot be obtained in some scenarios [#1122](https://github.com/pingcap/tidb-ansible/pull/1122) |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,113 @@ | ||
| --- | ||
| title: TiDB 3.1 RC Release Notes | ||
| category: Releases | ||
| --- | ||
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| # TiDB 3.1 RC Release Notes | ||
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| Release date: April 2, 2020 | ||
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| TiDB version: 3.1.0-rc | ||
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| TiDB Ansible version: 3.1.0-rc | ||
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| > **Warning:** | ||
| > | ||
| > Some known issues are found in this version, and these issues are fixed in new versions. It is recommended that you use the latest 3.1.x version. | ||
| ## New Features | ||
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| + TiDB | ||
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| - Use the binary search to re-implement partition pruning for better performance [#15678](https://github.com/pingcap/tidb/pull/15678) | ||
| - Support using the `RECOVER` syntax to recover the truncated table [#15460](https://github.com/pingcap/tidb/pull/15460) | ||
| - Add the `AUTO_RANDOM` ID cache for retrying statements and recovering tables [#15393](https://github.com/pingcap/tidb/pull/15393) | ||
| - Support restoring the state of the `AUTO_RANDOM` ID allocator using the `recover table` statement [#15393](https://github.com/pingcap/tidb/pull/15393) | ||
| - Support `YEAR`, `MONTH`, and `TO_DAY` functions as the partitioning keys of the Hash partitioned table [#15619](https://github.com/pingcap/tidb/pull/15619) | ||
| - Add the table ID to the schema-change related tables only when keys need to be locked in the `SELECT... FOR UPDATE` statement [#15708](https://github.com/pingcap/tidb/pull/15708) | ||
| - Add the feature of automatically reading data from different roles according to the load balancing policy and add the `leader-and-follower` system variable to enable this feature [#15721](https://github.com/pingcap/tidb/pull/15721) | ||
| - Support dynamically updating the TLS certificate every time TiDB establishes a new connection to update expired client certificate without restarting the RPC client side [#15163](https://github.com/pingcap/tidb/pull/15163) | ||
| - Upgrade PD Client to support loading the latest certificate every time TiDB establishes a new connection [#15425](https://github.com/pingcap/tidb/pull/15425) | ||
| - Forcibly use the HTTPS protocol with the configured TLS certificates between a TiDB server and a PD server, or between two TiDB servers when `cluster-ssl-*` is configured [#15430](https://github.com/pingcap/tidb/pull/15430) | ||
| - Add the MySQL-compatible `--require-secure-transport` startup option to force the client to enable TLS authentication during the configuration [#15442](https://github.com/pingcap/tidb/pull/15442) | ||
| - Add the `cluster-verify-cn` configuration item. After configuration, the status service can only be used when with the corresponding CN certificate [#15137](https://github.com/pingcap/tidb/pull/15137) | ||
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| + TiKV | ||
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| - Support backing up data with the Raw KV API [#7051](https://github.com/tikv/tikv/pull/7051) | ||
| - Support TLS authentication for the status server [#7142](https://github.com/tikv/tikv/pull/7142) | ||
| - Support TLS authentication for the KV server [#7305](https://github.com/tikv/tikv/pull/7305) | ||
| - Optimize the time to hold locks to improve the performance of backup [#7202](https://github.com/tikv/tikv/pull/7202) | ||
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| + PD | ||
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| - Support scheduling learner using `shuffle-region-scheduler` [#2235](https://github.com/pingcap/pd/pull/2235) | ||
| - Add commands in pd-ctl to configure Placement Rules [#2306](https://github.com/pingcap/pd/pull/2306) | ||
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| + Tools | ||
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| - TiDB Binlog | ||
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| * Support TLS authentication between the components [#931](https://github.com/pingcap/tidb-binlog/pull/931) [#937](https://github.com/pingcap/tidb-binlog/pull/937) [#939](https://github.com/pingcap/tidb-binlog/pull/939) | ||
| * Add the `kafka-client-id` configuration item in Drainer to configure Kafka's client ID [#929](https://github.com/pingcap/tidb-binlog/pull/929) | ||
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| - TiDB Lightning | ||
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| * Optimize the performance of TiDB Lightning [#281](https://github.com/pingcap/tidb-lightning/pull/281) [#275](https://github.com/pingcap/tidb-lightning/pull/275) | ||
| * Support TLS authentication for TiDB Lightning [#270](https://github.com/pingcap/tidb-lightning/pull/270) | ||
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| - BR | ||
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| * Optimize the log output [#189](https://github.com/pingcap/br/pull/189) | ||
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| + TiDB Ansible | ||
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| - Optimize the way the TiFlash data directories are created [#1242](https://github.com/pingcap/tidb-ansible/pull/1242) | ||
| - Add the `Write Amplification` monitoring item in TiFlash [#1234](https://github.com/pingcap/tidb-ansible/pull/1234) | ||
| - Optimize the error message of failed preflight checks when CPU epollexclusive is unavailable [#1243](https://github.com/pingcap/tidb-ansible/pull/1243) | ||
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| ## Bug Fixes | ||
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| + TiDB | ||
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| - Fix the information schema error caused by frequently updating the TiFlash replica [#14884](https://github.com/pingcap/tidb/pull/14884) | ||
| - Fix the issue that `last_insert_id` is incorrectly generated when applying `AUTO_RANDOM` [#15149](https://github.com/pingcap/tidb/pull/15149) | ||
| - Fix the issue that updating the status of TiFlash replica might cause the DDL operation to get stuck [#15161](https://github.com/pingcap/tidb/pull/15161) | ||
| - Forbid `Aggregation` pushdown and `TopN` pushdown when there are predicates that can not be pushed down [#15141](https://github.com/pingcap/tidb/pull/15141) | ||
| - Forbid the nested `view` creation [#15440](https://github.com/pingcap/tidb/pull/15440) | ||
| - Fix the error occurred when executing `SELECT CURRENT_ROLE()` after `SET ROLE ALL` [#15570](https://github.com/pingcap/tidb/pull/15570) | ||
| - Fix the failure to identify the `view` name when executing the `select view_name.col_name from view_name` statement [#15573](https://github.com/pingcap/tidb/pull/15573) | ||
| - Fix the issue that an error might occur when pre-processing DDL statements during the write of binlog information [#15444](https://github.com/pingcap/tidb/pull/15444) | ||
| - Fix the panic occurred when accessing both `view`s and partitioned tables [#15560](https://github.com/pingcap/tidb/pull/15560) | ||
| - Fix the error occurred when executing the `VALUES` function with the `update duplicate key` statement that contains the `bit(n)` data type [#15487](https://github.com/pingcap/tidb/pull/15487) | ||
| - Fix the issue that the specified maximum execution time fails to take effect in some scenarios [#15616](https://github.com/pingcap/tidb/pull/15616) | ||
| - Fix the issue that whether the current `ReadEngine` contains TiKV server is not checked when generating the execution plan using `Index Scan` [#15773](https://github.com/pingcap/tidb/pull/15773) | ||
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| + TiKV | ||
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| - Fix the issue of conflict check failure or data index inconsistency caused by inserting an existing key into a transaction and then deleting it immediately when disabling the consistency check parameter [#7112](https://github.com/tikv/tikv/pull/7112) | ||
| - Fix the calculation error when `TopN` compares unsigned integers [#7199](https://github.com/tikv/tikv/pull/7199) | ||
| - Introduce a flow control mechanism in Raftstore to solve the problem that without flow control, it might cause slow log tracking and cause the cluster to be stuck; and the problem that the large transaction size might cause the frequent reconnection among TiKV servers [#7087](https://github.com/tikv/tikv/pull/7087) [#7078](https://github.com/tikv/tikv/pull/7078) | ||
| - Fix the issue that pending read requests sent to replicas might be permanently blocked [#6543](https://github.com/tikv/tikv/pull/6543) | ||
| - Fix the issue that replica read might be blocked by applying snapshots [#7249](https://github.com/tikv/tikv/pull/7249) | ||
| - Fix the issue that transferring leader might cause TiKV to panic [#7240](https://github.com/tikv/tikv/pull/7240) | ||
| - Fix the issue that all SST files are filled with zeroes when backing up data to S3 [#6967](https://github.com/tikv/tikv/pull/6967) | ||
| - Fix the issue that the size of SST file is not recorded during backup, resulting in many empty Regions after restoration [#6983](https://github.com/tikv/tikv/pull/6983) | ||
| - Support AWS IAM web identity for backup [#7297](https://github.com/tikv/tikv/pull/7297) | ||
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| + PD | ||
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| - Fix the issue of incorrect Region information caused by data race when PD processes Region heartbeats [#2234](https://github.com/pingcap/pd/pull/2234) | ||
| - Fix the issue that `random-merge-scheduler` fails to follow location labels and Placement Rules [#2212](https://github.com/pingcap/pd/pull/2221) | ||
| - Fix the issue that a placement rule is overwritten by another placement rule with the same `startKey` and `endKey` [#2222](https://github.com/pingcap/pd/pull/2222) | ||
| - Fix the issue that the version number of API is inconsistent with that of PD server [#2192](https://github.com/pingcap/pd/pull/2192) | ||
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| + Tools | ||
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| - TiDB Lightning | ||
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| * Fix the bug that the `&` character is replaced by the `EOF` character in TiDB backend [#283](https://github.com/pingcap/tidb-lightning/pull/283) | ||
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| - BR | ||
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| * Fix the issue that BR cannot restore the TiFlash cluster data [#194](https://github.com/pingcap/br/pull/194) |
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