Error when writing block size less than 4K to VDO volumes

Issue

• Error when writing to VDO volumes
• What block sizes does VDO support?
• Write error when writing to VDO volume
• Error creating Oracle database or files

• Example errors:

  • Using the dd utility:

  # dd if=/dev/urandom of=/dev/mapper/vdo1 bs=4096 count=12 oflag=direct
  12+0 records in
  12+0 records out
  49152 bytes (49 kB) copied, 0.0174504 s, 2.8 MB/s
  
  # dd if=/dev/urandom of=/dev/mapper/vdo1 bs=512 count=12 oflag=direct
  dd: error writing ‘/dev/mapper/vdo1’: Invalid argument
  1+0 records in
  0+0 records out
  0 bytes (0 B) copied, 0.000499272 s, 0.0 kB/s
  

  • Using the sanlock utility:

  [ ERROR ] Failed to execute stage 'Misc configuration': Cannot acquire host id: (u'9bbc8b4d-2288-403c-80df-3405d8671b2c', SanlockException(22, 'Sanlock lockspace add failure', 'Invalid argument'))
  

  • Using the vioperf utility:

  # vioperf --duration=60s
  Using direct io (buffer size=1048576, alignment=512) for directory "/VDO"
  Error creating aligned memory