replace io.Discard usage to fix NUMA copy() latencies
On NUMA systems copying from 8K buffer allocated via
io.Discard leads to large latency build-up for every
```
copy(new8kbuf, largebuf)
```
can in-cur upto 1ms worth of latencies on NUMA systems
due to memory sharding across NUMA nodes.
- This change switches to a new parquet library
- SelectObjectContent now takes a single lock at the beginning and holds it
during the operation. Previously the operation took a lock every time the
parquet library performed a Seek on the underlying object stream.
- Add basic support for LogicalType annotations for timestamps.
Return as soon as an AND fails and whenever an OR succeeds. Faster and more flexible.
For example makes `select * from S3object where _2 != '' AND _2 > 1` able to operate on empty fields.
Followup to #13900
- remove some duplicated code
- reported a bug, separately fixed in #13664
- using strings.ReplaceAll() when needed
- using filepath.ToSlash() use when needed
- remove all non-Go style comments from the codebase
Co-authored-by: Aditya Manthramurthy <donatello@users.noreply.github.com>
Testing with `mc sql --compression BZIP2 --csv-input "rd=\n,fh=USE,fd=;" --query="select COUNT(*) from S3Object" local2/testbucket/nyc-taxi-data-10M.csv.bz2`
Before 96.98s, after 10.79s. Uses about 70% CPU while running.
This is to ensure that there are no projects
that try to import `minio/minio/pkg` into
their own repo. Any such common packages should
go to `https://github.com/minio/pkg`
Harshavardhana
Aditya Manthramurthy
Klaus Post
ferhat elmas
jiuker
Abirdcfly