SSD cache + O_DIRECT problem

[sumokiama]

Given the Velox configuration:
enable-ssd-cache=true
memory-use-mmap=true
cache.ssd-enable-odirect=true

Velox is sending misaligned data to the SSD cache and the device throws errors:
E1107 19:53:48.763626 87470 SsdFile.cpp:446] [SSDCA] Failed to write to SSD, file name: /mnt2/ssd/velox20, size: 3, offset: 2548736256, error code: 22, error string: Invalid argument

Assuming there is no way that O_DIRECT can be made compatible with misaligned data, is there a way in Gluten via configuration to ensure alignment (in this case the drive has a 4KB blocksize)?

[PHILO-HE]

cc @zhouyuan

[FelixYBW]

Velox ssd cache isn't very useful in Gluten, it's not seriously tested in Gluten. As far as I know no Gluten customer really use it.
Our suggestion is to implement your own cache system like DBX delta cache.