hyperledger / fabric-x-committer / 21941111475

90%

Build Type

push

github

Committed by web-flow

Commit Message

[vc] split tables into predefined number of tablets (#311)

#### Type of change

- Improvement (improvement to code, performance, etc)
 
#### Description

When a new table is created, YugabyteDB starts with a single tablet that
handles all initial writes. Auto-splitting only kicks in after the
tablet reaches a size threshold (~1 GB by default), meaning the first N
transactions all funnel through one tablet on one tserver — creating a
severe bottleneck during the critical warm-up phase.

By pre-splitting tables at CREATE TABLE time (e.g., SPLIT INTO 3 TABLETS
for a 3-node cluster), data is hash-distributed across all tservers from
the very first write. This converts cold-start throughput from
single-tserver-bound to cluster-wide from block 1.

This applies to all three table types: metadata, tx_status, and
per-namespace state tables (ns_*). The setting auto-detects the DB
backend and is silently ignored on PostgreSQL, which has no tablet
concept.

By default, we are not enabling the table pre-split in config so that
the test can run without stress.

#### Related issues

  - resolves #308 #61

Signed-off-by: Senthilnathan <cendhu@gmail.com>

Run Details

31 of 37 new or added lines in 2 files covered. (83.78%)

2 existing lines in 1 file now uncovered.

9106 of 10238 relevant lines covered (88.94%)

1.29 hits per line