TiDB Weekly

News & blog post

Last week, we published a post that shares how we use Backup & Restore (BR), a distributed backup and restore tool (that offers high backup and restore speeds—1 GB/s or more for 10 TB of data) to improve backup and restore speeds for large-scale TiDB clusters. If you specialize in database development, this post might inspire your backup and restore design work. If your application deals with huge amounts of data and you also attach great importance to data security and the efficiency of backup and restore, you can try TiDB with BR.

The full article is here:

How to Back Up and Restore a 10-TB Cluster at 1+ GB/s

Community

New contributors

tidb:

• wangming1993

pd:

• AndrewDi

docs:

• sumens
• ChristianLeow

tidb-operator:

• knightXun

binlog:

• tsthght

parser:

• hsqlu

chaos-mesh:

• iDube

Call for participation

TiDB

• All help-wanted issues in TiDB

TiKV

• All help-wanted issues in TiKV
• All help-wanted issues in PD

TiDB Change Data Capture (CDC)

• All help-wanted issues in TiDB Change Data Capture

Updates of the week

Progress

Last week, we landed 163 PRs in the TiDB repository, 14 PRs in the TiSpark repository, and 35 PRs in the TiKV and PD repositories.

TiDB

• Set length and frac when changing 0 to the decimal type
• Support the partition pruning for the floor(unix_timestamp()) partition expression
• Modify fields related to cop-tasks in the statement summary
• Use the single flight to load global variables
• Fix the infinite retry when the key-value Region continues to return the StaleCommand error
• Add sum_errors and sum_warnings to statement summary tables
• Do not eliminate the innermost NOT when pushing down NOT
• Fix the issue that the outer join cannot be simplified if a predicate just refers to the outer table
• Fix the issue that the default value of a sequence causes the not-null error in the primary key
• Unify the style for storage quota configuration names
• Fix the issue that generated columns might cause a server crash
• Fix the issue that the GC Worker stops working after a GC failure
• Fix the group by resolver for multiple items with the parameter marker
• Remove the enable-dynamic-config configuration item
• Push avg and distinct functions across unions
• Add the check for the expression evaluation in some executors
• Forbid truncating the view
• Refactor the code for multiple statements in one query
• Add the EnableCollectExecutionInfo configuration item

TiDB Dashboard

• Fix the incorrect Placement Driver (PD) TSO duration in the report
• Filter statements by SQL types
• Refine the page head of statements
• Add more node information and reorder the time consumption item

TiUP

• The tiup-cluster v0.4.9 is released.

TiKV

• Fix the batch empty request deadlock
• Fix make docker
• Check the state after resuming applying fsm
• Fix the wrong key being read on ingested files with global seqno and delta encoding
• Consider waking up messages when checking stale messages
• Support the encryption in snapshots

PD

• Fix the panic in the hot Region scheduler
• Re-implement the dynamic configuration

TiSpark

• Support TiDB 4.0

On-going TiDB event

TiDB Usability Challenge Program